From 9c1c6a1ba786d58bd03e27ee49f89a5685e8e07b Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 22 Oct 2007 14:18:06 +0400 Subject: ACPI: sleep: Fix GPE suspend cleanup Commit 9b039330808b83acac3597535da26f47ad1862ce removed acpi_gpe_sleep_prepare(), the only function used at S5 transition Add call to generic acpi_enable_wake_device(). Reference: https://bugzilla.novell.com/show_bug.cgi?id=299882 Signed-off-by: Alexey Starikovskiy Acked-by: Rafael J. Wysocki Signed-off-by: Len Brown --- drivers/acpi/sleep/main.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/acpi') diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c index f3d3867303ec..2f9d3c19907c 100644 --- a/drivers/acpi/sleep/main.c +++ b/drivers/acpi/sleep/main.c @@ -410,6 +410,7 @@ static void acpi_power_off(void) /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ printk("%s called\n", __FUNCTION__); local_irq_disable(); + acpi_enable_wakeup_device(ACPI_STATE_S5); acpi_enter_sleep_state(ACPI_STATE_S5); } -- cgit v1.2.3-58-ga151 From 1dbc1fda5d8ca907f320b806005d4a447977d26a Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 22 Oct 2007 14:18:12 +0400 Subject: ACPI: suspend: Wrong order of GPE restore. acpi_leave_sleep_state() should have correct list of wake and runtime GPEs, which is available only after disable_wakeup_device() is called. Signed-off-by: Alexey Starikovskiy Acked-by: Rafael J. Wysocki Signed-off-by: Len Brown --- drivers/acpi/sleep/main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c index 2f9d3c19907c..2c0b6630f8ba 100644 --- a/drivers/acpi/sleep/main.c +++ b/drivers/acpi/sleep/main.c @@ -167,8 +167,8 @@ static void acpi_pm_finish(void) { u32 acpi_state = acpi_target_sleep_state; - acpi_leave_sleep_state(acpi_state); acpi_disable_wakeup_device(acpi_state); + acpi_leave_sleep_state(acpi_state); /* reset firmware waking vector */ acpi_set_firmware_waking_vector((acpi_physical_address) 0); @@ -272,8 +272,8 @@ static void acpi_hibernation_finish(void) * enable it here. */ acpi_enable(); - acpi_leave_sleep_state(ACPI_STATE_S4); acpi_disable_wakeup_device(ACPI_STATE_S4); + acpi_leave_sleep_state(ACPI_STATE_S4); /* reset firmware waking vector */ acpi_set_firmware_waking_vector((acpi_physical_address) 0); -- cgit v1.2.3-58-ga151 From 23de5d9ef2a4bbc4f733f58311bcb7cf6239c813 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 22 Oct 2007 14:18:18 +0400 Subject: ACPI: button: send initial lid state after add and resume Input layer should know about initial state of lid switch, even before first notify. Reference: https://bugzilla.novell.com/show_bug.cgi?id=326814 Signed-off-by: Alexey Starikovskiy Acked-by: Rafael J. Wysocki Signed-off-by: Len Brown --- drivers/acpi/button.c | 37 +++++++++++++++++++++++++++++-------- 1 file changed, 29 insertions(+), 8 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c index 301e832e6961..24a7865a57cb 100644 --- a/drivers/acpi/button.c +++ b/drivers/acpi/button.c @@ -78,6 +78,7 @@ MODULE_DEVICE_TABLE(acpi, button_device_ids); static int acpi_button_add(struct acpi_device *device); static int acpi_button_remove(struct acpi_device *device, int type); +static int acpi_button_resume(struct acpi_device *device); static int acpi_button_info_open_fs(struct inode *inode, struct file *file); static int acpi_button_state_open_fs(struct inode *inode, struct file *file); @@ -87,6 +88,7 @@ static struct acpi_driver acpi_button_driver = { .ids = button_device_ids, .ops = { .add = acpi_button_add, + .resume = acpi_button_resume, .remove = acpi_button_remove, }, }; @@ -253,6 +255,19 @@ static int acpi_button_remove_fs(struct acpi_device *device) /* -------------------------------------------------------------------------- Driver Interface -------------------------------------------------------------------------- */ +static int acpi_lid_send_state(struct acpi_button *button) +{ + unsigned long state; + acpi_status status; + + status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, + &state); + if (ACPI_FAILURE(status)) + return -ENODEV; + /* input layer checks if event is redundant */ + input_report_switch(button->input, SW_LID, !state); + return 0; +} static void acpi_button_notify(acpi_handle handle, u32 event, void *data) { @@ -265,15 +280,8 @@ static void acpi_button_notify(acpi_handle handle, u32 event, void *data) switch (event) { case ACPI_BUTTON_NOTIFY_STATUS: input = button->input; - if (button->type == ACPI_BUTTON_TYPE_LID) { - struct acpi_handle *handle = button->device->handle; - unsigned long state; - - if (!ACPI_FAILURE(acpi_evaluate_integer(handle, "_LID", - NULL, &state))) - input_report_switch(input, SW_LID, !state); - + acpi_lid_send_state(button); } else { int keycode = test_bit(KEY_SLEEP, input->keybit) ? KEY_SLEEP : KEY_POWER; @@ -336,6 +344,17 @@ static int acpi_button_install_notify_handlers(struct acpi_button *button) return ACPI_FAILURE(status) ? -ENODEV : 0; } +static int acpi_button_resume(struct acpi_device *device) +{ + struct acpi_button *button; + if (!device) + return -EINVAL; + button = acpi_driver_data(device); + if (button && button->type == ACPI_BUTTON_TYPE_LID) + return acpi_lid_send_state(button); + return 0; +} + static void acpi_button_remove_notify_handlers(struct acpi_button *button) { switch (button->type) { @@ -453,6 +472,8 @@ static int acpi_button_add(struct acpi_device *device) error = input_register_device(input); if (error) goto err_remove_handlers; + if (button->type == ACPI_BUTTON_TYPE_LID) + acpi_lid_send_state(button); if (device->wakeup.flags.valid) { /* Button's GPE is run-wake GPE */ -- cgit v1.2.3-58-ga151 From 080e412cc0bdb9ef8e7a983d5e008537e1c4d36c Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 22 Oct 2007 14:18:30 +0400 Subject: ACPI: EC: Replace atomic variables with bits Number of flags is about to be increased, so it is better to put them all into bits. No functional changes. Signed-off-by: Alexey Starikovskiy Acked-by: Rafael J. Wysocki Signed-off-by: Len Brown --- drivers/acpi/ec.c | 79 ++++++++++++++++++++++++++----------------------------- 1 file changed, 38 insertions(+), 41 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 7b4178393e34..08fbe62a2db4 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -65,7 +65,7 @@ enum ec_command { /* EC events */ enum ec_event { ACPI_EC_EVENT_OBF_1 = 1, /* Output buffer full */ - ACPI_EC_EVENT_IBF_0, /* Input buffer empty */ + ACPI_EC_EVENT_IBF_0, /* Input buffer empty */ }; #define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */ @@ -76,6 +76,11 @@ static enum ec_mode { EC_POLL, /* Input buffer empty */ } acpi_ec_mode = EC_INTR; +enum { + EC_FLAGS_WAIT_GPE = 0, /* Don't check status until GPE arrives */ + EC_FLAGS_QUERY_PENDING, /* Query is pending */ +}; + static int acpi_ec_remove(struct acpi_device *device, int type); static int acpi_ec_start(struct acpi_device *device); static int acpi_ec_stop(struct acpi_device *device, int type); @@ -116,9 +121,8 @@ static struct acpi_ec { unsigned long command_addr; unsigned long data_addr; unsigned long global_lock; + unsigned long flags; struct mutex lock; - atomic_t query_pending; - atomic_t event_count; wait_queue_head_t wait; struct list_head list; u8 handlers_installed; @@ -148,45 +152,42 @@ static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data) outb(data, ec->data_addr); } -static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event, - unsigned old_count) +static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event) { - u8 status = acpi_ec_read_status(ec); - if (old_count == atomic_read(&ec->event_count)) + if (test_bit(EC_FLAGS_WAIT_GPE, &ec->flags)) return 0; if (event == ACPI_EC_EVENT_OBF_1) { - if (status & ACPI_EC_FLAG_OBF) + if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_OBF) return 1; } else if (event == ACPI_EC_EVENT_IBF_0) { - if (!(status & ACPI_EC_FLAG_IBF)) + if (!(acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF)) return 1; } return 0; } -static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, - unsigned count, int force_poll) +static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll) { if (unlikely(force_poll) || acpi_ec_mode == EC_POLL) { unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); + clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); while (time_before(jiffies, delay)) { - if (acpi_ec_check_status(ec, event, 0)) + if (acpi_ec_check_status(ec, event)) return 0; } } else { - if (wait_event_timeout(ec->wait, - acpi_ec_check_status(ec, event, count), - msecs_to_jiffies(ACPI_EC_DELAY)) || - acpi_ec_check_status(ec, event, 0)) { + if (wait_event_timeout(ec->wait, acpi_ec_check_status(ec, event), + msecs_to_jiffies(ACPI_EC_DELAY))) + return 0; + clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); + if (acpi_ec_check_status(ec, event)) { return 0; - } else { - printk(KERN_ERR PREFIX "acpi_ec_wait timeout," - " status = %d, expect_event = %d\n", - acpi_ec_read_status(ec), event); } } - + printk(KERN_ERR PREFIX "acpi_ec_wait timeout," + " status = %d, expect_event = %d\n", + acpi_ec_read_status(ec), event); return -ETIME; } @@ -196,39 +197,38 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, int force_poll) { int result = 0; - unsigned count = atomic_read(&ec->event_count); + set_bit(EC_FLAGS_WAIT_GPE, &ec->flags); acpi_ec_write_cmd(ec, command); for (; wdata_len > 0; --wdata_len) { - result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count, force_poll); + result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, force_poll); if (result) { printk(KERN_ERR PREFIX "write_cmd timeout, command = %d\n", command); goto end; } - count = atomic_read(&ec->event_count); + set_bit(EC_FLAGS_WAIT_GPE, &ec->flags); acpi_ec_write_data(ec, *(wdata++)); } if (!rdata_len) { - result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count, force_poll); + result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, force_poll); if (result) { printk(KERN_ERR PREFIX "finish-write timeout, command = %d\n", command); goto end; } - } else if (command == ACPI_EC_COMMAND_QUERY) { - atomic_set(&ec->query_pending, 0); - } + } else if (command == ACPI_EC_COMMAND_QUERY) + clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); for (; rdata_len > 0; --rdata_len) { - result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, count, force_poll); + result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, force_poll); if (result) { printk(KERN_ERR PREFIX "read timeout, command = %d\n", command); goto end; } - count = atomic_read(&ec->event_count); + set_bit(EC_FLAGS_WAIT_GPE, &ec->flags); *(rdata++) = acpi_ec_read_data(ec); } end: @@ -261,7 +261,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command, /* Make sure GPE is enabled before doing transaction */ acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); - status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, 0, 0); + status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, 0); if (status) { printk(KERN_ERR PREFIX "input buffer is not empty, aborting transaction\n"); @@ -476,20 +476,18 @@ static void acpi_ec_gpe_query(void *ec_cxt) static u32 acpi_ec_gpe_handler(void *data) { acpi_status status = AE_OK; - u8 value; struct acpi_ec *ec = data; - atomic_inc(&ec->event_count); + clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); if (acpi_ec_mode == EC_INTR) { wake_up(&ec->wait); } - value = acpi_ec_read_status(ec); - if ((value & ACPI_EC_FLAG_SCI) && !atomic_read(&ec->query_pending)) { - atomic_set(&ec->query_pending, 1); - status = - acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec); + if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI) { + if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) + status = acpi_os_execute(OSL_EC_BURST_HANDLER, + acpi_ec_gpe_query, ec); } return status == AE_OK ? @@ -642,8 +640,7 @@ static struct acpi_ec *make_acpi_ec(void) if (!ec) return NULL; - atomic_set(&ec->query_pending, 1); - atomic_set(&ec->event_count, 1); + ec->flags = 1 << EC_FLAGS_QUERY_PENDING; mutex_init(&ec->lock); init_waitqueue_head(&ec->wait); INIT_LIST_HEAD(&ec->list); @@ -833,7 +830,7 @@ static int acpi_ec_start(struct acpi_device *device) ret = ec_install_handlers(ec); /* EC is fully operational, allow queries */ - atomic_set(&ec->query_pending, 0); + clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); return ret; } -- cgit v1.2.3-58-ga151 From 0c5d31f48e54b2e56e9cef8d49ffedaef1e0ea52 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 22 Oct 2007 14:18:36 +0400 Subject: ACPI: EC: Don't expect interrupt after last read There is no interrupt after last read according to spec, so don't set bit that we are expecting one. Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 08fbe62a2db4..5ce90ce22b58 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -228,7 +228,9 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, command); goto end; } - set_bit(EC_FLAGS_WAIT_GPE, &ec->flags); + /* Don't expect GPE after last read */ + if (rdata_len > 1) + set_bit(EC_FLAGS_WAIT_GPE, &ec->flags); *(rdata++) = acpi_ec_read_data(ec); } end: -- cgit v1.2.3-58-ga151 From 7843932ac42899b936085beaea8620d4489b8b3f Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 22 Oct 2007 14:18:43 +0400 Subject: ACPI: EC: auto select interrupt mode Start in POLL mode, and if we receive confirmation GPE, switch to INT mode. If confirmations are not sent, switch back to POLL. Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- Documentation/kernel-parameters.txt | 5 ---- drivers/acpi/ec.c | 51 ++++++++++++------------------------- 2 files changed, 16 insertions(+), 40 deletions(-) (limited to 'drivers/acpi') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index a13d69b2217d..727cc08f0f3b 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -586,11 +586,6 @@ and is between 256 and 4096 characters. It is defined in the file eata= [HW,SCSI] - ec_intr= [HW,ACPI] ACPI Embedded Controller interrupt mode - Format: - 0: polling mode - non-0: interrupt mode (default) - edd= [EDD] Format: {"of[f]" | "sk[ipmbr]"} See comment in arch/i386/boot/edd.S diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 5ce90ce22b58..50d55fe71a30 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -71,14 +71,10 @@ enum ec_event { #define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */ #define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ -static enum ec_mode { - EC_INTR = 1, /* Output buffer full */ - EC_POLL, /* Input buffer empty */ -} acpi_ec_mode = EC_INTR; - enum { EC_FLAGS_WAIT_GPE = 0, /* Don't check status until GPE arrives */ EC_FLAGS_QUERY_PENDING, /* Query is pending */ + EC_FLAGS_GPE_MODE, /* Expect GPE to be sent for status change */ }; static int acpi_ec_remove(struct acpi_device *device, int type); @@ -169,21 +165,23 @@ static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event) static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll) { - if (unlikely(force_poll) || acpi_ec_mode == EC_POLL) { - unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); - clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); - while (time_before(jiffies, delay)) { - if (acpi_ec_check_status(ec, event)) - return 0; - } - } else { + if (likely(test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) && + likely(!force_poll)) { if (wait_event_timeout(ec->wait, acpi_ec_check_status(ec, event), msecs_to_jiffies(ACPI_EC_DELAY))) return 0; clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); if (acpi_ec_check_status(ec, event)) { + clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); return 0; } + } else { + unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); + clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); + while (time_before(jiffies, delay)) { + if (acpi_ec_check_status(ec, event)) + return 0; + } } printk(KERN_ERR PREFIX "acpi_ec_wait timeout," " status = %d, expect_event = %d\n", @@ -481,18 +479,17 @@ static u32 acpi_ec_gpe_handler(void *data) struct acpi_ec *ec = data; clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); - - if (acpi_ec_mode == EC_INTR) { + if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) wake_up(&ec->wait); - } if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI) { if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) status = acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec); - } + } else if (unlikely(!test_bit(EC_FLAGS_GPE_MODE, &ec->flags))) + set_bit(EC_FLAGS_GPE_MODE, &ec->flags); - return status == AE_OK ? + return ACPI_SUCCESS(status) ? ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; } @@ -923,20 +920,4 @@ static void __exit acpi_ec_exit(void) return; } -#endif /* 0 */ - -static int __init acpi_ec_set_intr_mode(char *str) -{ - int intr; - - if (!get_option(&str, &intr)) - return 0; - - acpi_ec_mode = (intr) ? EC_INTR : EC_POLL; - - printk(KERN_NOTICE PREFIX "%s mode.\n", intr ? "interrupt" : "polling"); - - return 1; -} - -__setup("ec_intr=", acpi_ec_set_intr_mode); +#endif /* 0 */ -- cgit v1.2.3-58-ga151 From 1c55053c21706ccf1fdb26b4bb6d05c4a2782ffe Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 22 Oct 2007 14:18:50 +0400 Subject: ACPI: EC: Don't re-enable GPE for each transaction. With the auto selection of operation mode, absence of GPEs does not really degrade performance, so let PM code to handle enabling/disabling GPEs. This is a revert of 5d57a6a55ec0bdcb952dbcd3f8ffcde8a3ee9413, which was meant to be temporary. Reference: http://bugzilla.kernel.org/show_bug.cgi?id=7977 Signed-off-by: Alexey Starikovskiy Acked-by: Rafael J. Wysocki Signed-off-by: Len Brown --- drivers/acpi/ec.c | 5 ----- 1 file changed, 5 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 50d55fe71a30..41a21fcdbcb8 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -258,9 +258,6 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command, } } - /* Make sure GPE is enabled before doing transaction */ - acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); - status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, 0); if (status) { printk(KERN_ERR PREFIX @@ -638,12 +635,10 @@ static struct acpi_ec *make_acpi_ec(void) struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); if (!ec) return NULL; - ec->flags = 1 << EC_FLAGS_QUERY_PENDING; mutex_init(&ec->lock); init_waitqueue_head(&ec->wait); INIT_LIST_HEAD(&ec->list); - return ec; } -- cgit v1.2.3-58-ga151 From 66c5f4e7367b0085652931b2f3366de29e7ff5ec Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 22 Oct 2007 14:18:56 +0400 Subject: ACPI: EC: Add workaround for "optimized" controllers Some controllers do not send interrupts for OBF=1 event, but send them for IBF=0. Add workaround for them. Reference: http://bugzilla.kernel.org/show_bug.cgi?id=8459 Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 41a21fcdbcb8..202db575d5db 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -75,6 +75,7 @@ enum { EC_FLAGS_WAIT_GPE = 0, /* Don't check status until GPE arrives */ EC_FLAGS_QUERY_PENDING, /* Query is pending */ EC_FLAGS_GPE_MODE, /* Expect GPE to be sent for status change */ + EC_FLAGS_ONLY_IBF_GPE, /* Expect GPE only for IBF = 0 event */ }; static int acpi_ec_remove(struct acpi_device *device, int type); @@ -172,7 +173,12 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll) return 0; clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); if (acpi_ec_check_status(ec, event)) { - clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); + if (event == ACPI_EC_EVENT_OBF_1) + /* miss OBF = 1 GPE, don't expect it anymore */ + set_bit(EC_FLAGS_ONLY_IBF_GPE, &ec->flags); + else + /* missing GPEs, switch back to poll mode */ + clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); return 0; } } else { @@ -220,6 +226,8 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); for (; rdata_len > 0; --rdata_len) { + if (test_bit(EC_FLAGS_ONLY_IBF_GPE, &ec->flags)) + force_poll = 1; result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, force_poll); if (result) { printk(KERN_ERR PREFIX "read timeout, command = %d\n", -- cgit v1.2.3-58-ga151 From 95b937e3f52a7f5546c4bffe29886fe400bad1d1 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 22 Oct 2007 14:19:03 +0400 Subject: ACPI: EC: Output changes to operational mode Insert printk() for every change in operational mode. Signed-off-by: Alexey Starikovskiy Acked-by: Rafael J. Wysocki Signed-off-by: Len Brown --- drivers/acpi/ec.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 202db575d5db..bf60b24ebf54 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -173,12 +173,17 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll) return 0; clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); if (acpi_ec_check_status(ec, event)) { - if (event == ACPI_EC_EVENT_OBF_1) + if (event == ACPI_EC_EVENT_OBF_1) { /* miss OBF = 1 GPE, don't expect it anymore */ + printk(KERN_INFO PREFIX "missing OBF_1 confirmation," + "switching to degraded mode.\n"); set_bit(EC_FLAGS_ONLY_IBF_GPE, &ec->flags); - else + } else { /* missing GPEs, switch back to poll mode */ + printk(KERN_INFO PREFIX "missing IBF_1 confirmations," + "switch off interrupt mode.\n"); clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); + } return 0; } } else { @@ -491,8 +496,12 @@ static u32 acpi_ec_gpe_handler(void *data) if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) status = acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec); - } else if (unlikely(!test_bit(EC_FLAGS_GPE_MODE, &ec->flags))) + } else if (unlikely(!test_bit(EC_FLAGS_GPE_MODE, &ec->flags))) { + /* this is non-query, must be confirmation */ + printk(KERN_INFO PREFIX "non-query interrupt received," + " switching to interrupt mode\n"); set_bit(EC_FLAGS_GPE_MODE, &ec->flags); + } return ACPI_SUCCESS(status) ? ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; @@ -740,6 +749,8 @@ static int acpi_ec_add(struct acpi_device *device) acpi_ec_add_fs(device); printk(KERN_INFO PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n", ec->gpe, ec->command_addr, ec->data_addr); + printk(KERN_INFO PREFIX "driver started in %s mode\n", + (test_bit(EC_FLAGS_GPE_MODE, &ec->flags))?"interrupt":"poll"); return 0; } -- cgit v1.2.3-58-ga151 From c35923bc558074d4f5e6f9706e4cb9811ae55775 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 22 Oct 2007 14:19:09 +0400 Subject: ACPI: power: don't cache power resource state ACPI may change power resource state behind our back, so don't keep our local copy, which may not be valid. Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/bus.c | 6 ++--- drivers/acpi/power.c | 63 ++++++++++++++++++++-------------------------------- 2 files changed, 26 insertions(+), 43 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index fb2cff9a2d24..fdee82d37b7d 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -198,11 +198,9 @@ int acpi_bus_set_power(acpi_handle handle, int state) return -ENODEV; } /* - * Get device's current power state if it's unknown - * This means device power state isn't initialized or previous setting failed + * Get device's current power state */ - if ((device->power.state == ACPI_STATE_UNKNOWN) || device->flags.force_power_state) - acpi_bus_get_power(device->handle, &device->power.state); + acpi_bus_get_power(device->handle, &device->power.state); if ((state == device->power.state) && !device->flags.force_power_state) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", state)); diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c index 57b9a2998fd0..af1769a20c7a 100644 --- a/drivers/acpi/power.c +++ b/drivers/acpi/power.c @@ -86,7 +86,6 @@ struct acpi_power_resource { acpi_bus_id name; u32 system_level; u32 order; - int state; struct mutex resource_lock; struct list_head reference; }; @@ -128,33 +127,31 @@ acpi_power_get_context(acpi_handle handle, return 0; } -static int acpi_power_get_state(struct acpi_power_resource *resource) +static int acpi_power_get_state(struct acpi_power_resource *resource, int *state) { acpi_status status = AE_OK; unsigned long sta = 0; - if (!resource) + if (!resource || !state) return -EINVAL; status = acpi_evaluate_integer(resource->device->handle, "_STA", NULL, &sta); if (ACPI_FAILURE(status)) return -ENODEV; - if (sta & 0x01) - resource->state = ACPI_POWER_RESOURCE_STATE_ON; - else - resource->state = ACPI_POWER_RESOURCE_STATE_OFF; + *state = (sta & 0x01)?ACPI_POWER_RESOURCE_STATE_ON: + ACPI_POWER_RESOURCE_STATE_OFF; ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] is %s\n", - resource->name, resource->state ? "on" : "off")); + resource->name, state ? "on" : "off")); return 0; } static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state) { - int result = 0; + int result = 0, state1; struct acpi_power_resource *resource = NULL; u32 i = 0; @@ -168,11 +165,11 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state) result = acpi_power_get_context(list->handles[i], &resource); if (result) return result; - result = acpi_power_get_state(resource); + result = acpi_power_get_state(resource, &state1); if (result) return result; - *state = resource->state; + *state = state1; if (*state != ACPI_POWER_RESOURCE_STATE_ON) break; @@ -186,7 +183,7 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state) static int acpi_power_on(acpi_handle handle, struct acpi_device *dev) { - int result = 0; + int result = 0, state; int found = 0; acpi_status status = AE_OK; struct acpi_power_resource *resource = NULL; @@ -224,20 +221,14 @@ static int acpi_power_on(acpi_handle handle, struct acpi_device *dev) } mutex_unlock(&resource->resource_lock); - if (resource->state == ACPI_POWER_RESOURCE_STATE_ON) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] already on\n", - resource->name)); - return 0; - } - status = acpi_evaluate_object(resource->device->handle, "_ON", NULL, NULL); if (ACPI_FAILURE(status)) return -ENODEV; - result = acpi_power_get_state(resource); + result = acpi_power_get_state(resource, &state); if (result) return result; - if (resource->state != ACPI_POWER_RESOURCE_STATE_ON) + if (state != ACPI_POWER_RESOURCE_STATE_ON) return -ENOEXEC; /* Update the power resource's _device_ power state */ @@ -250,7 +241,7 @@ static int acpi_power_on(acpi_handle handle, struct acpi_device *dev) static int acpi_power_off_device(acpi_handle handle, struct acpi_device *dev) { - int result = 0; + int result = 0, state; acpi_status status = AE_OK; struct acpi_power_resource *resource = NULL; struct list_head *node, *next; @@ -281,20 +272,14 @@ static int acpi_power_off_device(acpi_handle handle, struct acpi_device *dev) } mutex_unlock(&resource->resource_lock); - if (resource->state == ACPI_POWER_RESOURCE_STATE_OFF) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] already off\n", - resource->name)); - return 0; - } - status = acpi_evaluate_object(resource->device->handle, "_OFF", NULL, NULL); if (ACPI_FAILURE(status)) return -ENODEV; - result = acpi_power_get_state(resource); + result = acpi_power_get_state(resource, &state); if (result) return result; - if (resource->state != ACPI_POWER_RESOURCE_STATE_OFF) + if (state != ACPI_POWER_RESOURCE_STATE_OFF) return -ENOEXEC; /* Update the power resource's _device_ power state */ @@ -494,7 +479,7 @@ static struct proc_dir_entry *acpi_power_dir; static int acpi_power_seq_show(struct seq_file *seq, void *offset) { int count = 0; - int result = 0; + int result = 0, state; struct acpi_power_resource *resource = NULL; struct list_head *node, *next; struct acpi_power_reference *ref; @@ -505,12 +490,12 @@ static int acpi_power_seq_show(struct seq_file *seq, void *offset) if (!resource) goto end; - result = acpi_power_get_state(resource); + result = acpi_power_get_state(resource, &state); if (result) goto end; seq_puts(seq, "state: "); - switch (resource->state) { + switch (state) { case ACPI_POWER_RESOURCE_STATE_ON: seq_puts(seq, "on\n"); break; @@ -591,7 +576,7 @@ static int acpi_power_remove_fs(struct acpi_device *device) static int acpi_power_add(struct acpi_device *device) { - int result = 0; + int result = 0, state; acpi_status status = AE_OK; struct acpi_power_resource *resource = NULL; union acpi_object acpi_object; @@ -622,11 +607,11 @@ static int acpi_power_add(struct acpi_device *device) resource->system_level = acpi_object.power_resource.system_level; resource->order = acpi_object.power_resource.resource_order; - result = acpi_power_get_state(resource); + result = acpi_power_get_state(resource, &state); if (result) goto end; - switch (resource->state) { + switch (state) { case ACPI_POWER_RESOURCE_STATE_ON: device->power.state = ACPI_STATE_D0; break; @@ -643,7 +628,7 @@ static int acpi_power_add(struct acpi_device *device) goto end; printk(KERN_INFO PREFIX "%s [%s] (%s)\n", acpi_device_name(device), - acpi_device_bid(device), resource->state ? "on" : "off"); + acpi_device_bid(device), state ? "on" : "off"); end: if (result) @@ -680,7 +665,7 @@ static int acpi_power_remove(struct acpi_device *device, int type) static int acpi_power_resume(struct acpi_device *device) { - int result = 0; + int result = 0, state; struct acpi_power_resource *resource = NULL; struct acpi_power_reference *ref; @@ -689,12 +674,12 @@ static int acpi_power_resume(struct acpi_device *device) resource = (struct acpi_power_resource *)acpi_driver_data(device); - result = acpi_power_get_state(resource); + result = acpi_power_get_state(resource, &state); if (result) return result; mutex_lock(&resource->resource_lock); - if ((resource->state == ACPI_POWER_RESOURCE_STATE_OFF) && + if (state == ACPI_POWER_RESOURCE_STATE_OFF && !list_empty(&resource->reference)) { ref = container_of(resource->reference.next, struct acpi_power_reference, node); mutex_unlock(&resource->resource_lock); -- cgit v1.2.3-58-ga151 From 968fc5dc2699434ea1cbddaf189f19c4eb4dbe55 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 22 Oct 2007 14:19:15 +0400 Subject: ACPI: Fan: fan device does not need own structure Signed-off-by: Alexey Starikovskiy Acked-by: Rafael J. Wysocki Signed-off-by: Len Brown --- drivers/acpi/fan.c | 32 +++++++------------------------- 1 file changed, 7 insertions(+), 25 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c index c81f6bdb68b8..a6e149d692cb 100644 --- a/drivers/acpi/fan.c +++ b/drivers/acpi/fan.c @@ -68,10 +68,6 @@ static struct acpi_driver acpi_fan_driver = { }, }; -struct acpi_fan { - struct acpi_device * device; -}; - /* -------------------------------------------------------------------------- FS Interface (/proc) -------------------------------------------------------------------------- */ @@ -80,12 +76,12 @@ static struct proc_dir_entry *acpi_fan_dir; static int acpi_fan_read_state(struct seq_file *seq, void *offset) { - struct acpi_fan *fan = seq->private; + struct acpi_device *device = seq->private; int state = 0; - if (fan) { - if (acpi_bus_get_power(fan->device->handle, &state)) + if (device) { + if (acpi_bus_get_power(device->handle, &state)) seq_printf(seq, "status: ERROR\n"); else seq_printf(seq, "status: %s\n", @@ -105,11 +101,10 @@ acpi_fan_write_state(struct file *file, const char __user * buffer, { int result = 0; struct seq_file *m = file->private_data; - struct acpi_fan *fan = m->private; + struct acpi_device *device = m->private; char state_string[12] = { '\0' }; - - if (!fan || (count > sizeof(state_string) - 1)) + if (count > sizeof(state_string) - 1) return -EINVAL; if (copy_from_user(state_string, buffer, count)) @@ -117,7 +112,7 @@ acpi_fan_write_state(struct file *file, const char __user * buffer, state_string[count] = '\0'; - result = acpi_bus_set_power(fan->device->handle, + result = acpi_bus_set_power(device->handle, simple_strtoul(state_string, NULL, 0)); if (result) return result; @@ -158,7 +153,7 @@ static int acpi_fan_add_fs(struct acpi_device *device) return -ENODEV; else { entry->proc_fops = &acpi_fan_state_ops; - entry->data = acpi_driver_data(device); + entry->data = device; entry->owner = THIS_MODULE; } @@ -191,14 +186,8 @@ static int acpi_fan_add(struct acpi_device *device) if (!device) return -EINVAL; - fan = kzalloc(sizeof(struct acpi_fan), GFP_KERNEL); - if (!fan) - return -ENOMEM; - - fan->device = device; strcpy(acpi_device_name(device), "Fan"); strcpy(acpi_device_class(device), ACPI_FAN_CLASS); - acpi_driver_data(device) = fan; result = acpi_bus_get_power(device->handle, &state); if (result) { @@ -227,18 +216,11 @@ static int acpi_fan_add(struct acpi_device *device) static int acpi_fan_remove(struct acpi_device *device, int type) { - struct acpi_fan *fan = NULL; - - if (!device || !acpi_driver_data(device)) return -EINVAL; - fan = acpi_driver_data(device); - acpi_fan_remove_fs(device); - kfree(fan); - return 0; } -- cgit v1.2.3-58-ga151 From 93ad7c07ad487b036add8760dabcc35666a550ef Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 22 Oct 2007 14:19:21 +0400 Subject: ACPI: Fan: Drop force_power_state acpi_device option force_power_state was used as a workaround for invalid cached power state of the device. We do not cache power state, so no need for workaround. Signed-off-by: Alexey Starikovskiy Acked-by: Rafael J. Wysocki Signed-off-by: Len Brown --- drivers/acpi/bus.c | 2 +- drivers/acpi/fan.c | 40 ---------------------------------------- include/acpi/acpi_bus.h | 3 +-- 3 files changed, 2 insertions(+), 43 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index fdee82d37b7d..49d432d0a12c 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -201,7 +201,7 @@ int acpi_bus_set_power(acpi_handle handle, int state) * Get device's current power state */ acpi_bus_get_power(device->handle, &device->power.state); - if ((state == device->power.state) && !device->flags.force_power_state) { + if (state == device->power.state) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", state)); return 0; diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c index a6e149d692cb..a5a5532db268 100644 --- a/drivers/acpi/fan.c +++ b/drivers/acpi/fan.c @@ -47,8 +47,6 @@ MODULE_LICENSE("GPL"); static int acpi_fan_add(struct acpi_device *device); static int acpi_fan_remove(struct acpi_device *device, int type); -static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state); -static int acpi_fan_resume(struct acpi_device *device); static const struct acpi_device_id fan_device_ids[] = { {"PNP0C0B", 0}, @@ -63,8 +61,6 @@ static struct acpi_driver acpi_fan_driver = { .ops = { .add = acpi_fan_add, .remove = acpi_fan_remove, - .suspend = acpi_fan_suspend, - .resume = acpi_fan_resume, }, }; @@ -195,10 +191,6 @@ static int acpi_fan_add(struct acpi_device *device) goto end; } - device->flags.force_power_state = 1; - acpi_bus_set_power(device->handle, state); - device->flags.force_power_state = 0; - result = acpi_fan_add_fs(device); if (result) goto end; @@ -224,38 +216,6 @@ static int acpi_fan_remove(struct acpi_device *device, int type) return 0; } -static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state) -{ - if (!device) - return -EINVAL; - - acpi_bus_set_power(device->handle, ACPI_STATE_D0); - - return AE_OK; -} - -static int acpi_fan_resume(struct acpi_device *device) -{ - int result = 0; - int power_state = 0; - - if (!device) - return -EINVAL; - - result = acpi_bus_get_power(device->handle, &power_state); - if (result) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Error reading fan power state\n")); - return result; - } - - device->flags.force_power_state = 1; - acpi_bus_set_power(device->handle, power_state); - device->flags.force_power_state = 0; - - return result; -} - static int __init acpi_fan_init(void) { int result = 0; diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 7b74b60a68a4..19c3ead2a90b 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -168,8 +168,7 @@ struct acpi_device_flags { u32 power_manageable:1; u32 performance_manageable:1; u32 wake_capable:1; /* Wakeup(_PRW) supported? */ - u32 force_power_state:1; - u32 reserved:19; + u32 reserved:20; }; /* File System */ -- cgit v1.2.3-58-ga151 From c9e4172cde0f793dbf48c99bdfd0abe7d18e4b09 Mon Sep 17 00:00:00 2001 From: Adrian Bunk Date: Wed, 24 Oct 2007 18:25:37 +0200 Subject: ACPI: battery: remove dead code After commit f1d4661abe05d0a2c014166042d15ed8b69ae8f2 this was dead code. Spotted by the Coverity checker. Signed-off-by: Adrian Bunk Acked-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/battery.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index 681e26b56b11..a291849f6c5d 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -554,10 +554,6 @@ static ssize_t acpi_battery_write_alarm(struct file *file, if (!battery || (count > sizeof(alarm_string) - 1)) return -EINVAL; - if (result) { - result = -ENODEV; - goto end; - } if (!acpi_battery_present(battery)) { result = -ENODEV; goto end; -- cgit v1.2.3-58-ga151 From 1544fdbc857cbe8afca16a521d3254346befeb06 Mon Sep 17 00:00:00 2001 From: Adrian Bunk Date: Wed, 24 Oct 2007 18:26:00 +0200 Subject: ACPI: EC: fix use-after-free This patch fixes a use-after-free introduced by commit 30c08574da0ead1a47797ce028218ce5b2de61c7 (ACPI: EC: Add new query handler to list head) Spotted by the Coverity checker. Signed-off-by: Adrian Bunk Acked-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index bf60b24ebf54..06b78e5e33a1 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -445,9 +445,9 @@ EXPORT_SYMBOL_GPL(acpi_ec_add_query_handler); void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit) { - struct acpi_ec_query_handler *handler; + struct acpi_ec_query_handler *handler, *tmp; mutex_lock(&ec->lock); - list_for_each_entry(handler, &ec->list, node) { + list_for_each_entry_safe(handler, tmp, &ec->list, node) { if (query_bit == handler->query_bit) { list_del(&handler->node); kfree(handler); -- cgit v1.2.3-58-ga151 From b19073a0be5e317d626b3b404e0039b59383891c Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Thu, 25 Oct 2007 17:10:47 -0400 Subject: ACPI: battery: Update battery information upon sysfs read. Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/battery.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/acpi') diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index a291849f6c5d..9da8cec80fd1 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -130,6 +130,8 @@ static int acpi_battery_technology(struct acpi_battery *battery) return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; } +static int acpi_battery_update(struct acpi_battery *battery); + static int acpi_battery_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) @@ -139,6 +141,7 @@ static int acpi_battery_get_property(struct power_supply *psy, if ((!acpi_battery_present(battery)) && psp != POWER_SUPPLY_PROP_PRESENT) return -ENODEV; + acpi_battery_update(battery); switch (psp) { case POWER_SUPPLY_PROP_STATUS: if (battery->state & 0x01) -- cgit v1.2.3-58-ga151 From 508df92d1f8d1921013cb4f45bb547d0eaff912a Mon Sep 17 00:00:00 2001 From: Andrey Borzenkov Date: Sun, 28 Oct 2007 12:50:09 +0300 Subject: ACPI: battery: register power_supply subdevice only when battery is present Make sure no power_supply object is present unless we actualy detect presence of battery. This fixes ghost batteries detected by HAL Signed-off-by: Andrey Borzenkov Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/battery.c | 130 ++++++++++++++++++++++++++++--------------------- 1 file changed, 75 insertions(+), 55 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index 9da8cec80fd1..489d3385efe4 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -388,29 +388,81 @@ static int acpi_battery_init_alarm(struct acpi_battery *battery) return acpi_battery_set_alarm(battery); } +static ssize_t acpi_battery_alarm_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); + return sprintf(buf, "%d\n", battery->alarm * 1000); +} + +static ssize_t acpi_battery_alarm_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + unsigned long x; + struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); + if (sscanf(buf, "%ld\n", &x) == 1) + battery->alarm = x/1000; + if (acpi_battery_present(battery)) + acpi_battery_set_alarm(battery); + return count; +} + +static struct device_attribute alarm_attr = { + .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE}, + .show = acpi_battery_alarm_show, + .store = acpi_battery_alarm_store, +}; + +static int sysfs_add_battery(struct acpi_battery *battery) +{ + int result; + + battery->update_time = 0; + result = acpi_battery_get_info(battery); + acpi_battery_init_alarm(battery); + if (result) + return result; + if (battery->power_unit) { + battery->bat.properties = charge_battery_props; + battery->bat.num_properties = + ARRAY_SIZE(charge_battery_props); + } else { + battery->bat.properties = energy_battery_props; + battery->bat.num_properties = + ARRAY_SIZE(energy_battery_props); + } + + battery->bat.name = acpi_device_bid(battery->device); + battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; + battery->bat.get_property = acpi_battery_get_property; + + result = power_supply_register(&battery->device->dev, &battery->bat); + if (result) + return result; + return device_create_file(battery->bat.dev, &alarm_attr); +} + +static void sysfs_remove_battery(struct acpi_battery *battery) +{ + if (!battery->bat.dev) + return; + device_remove_file(battery->bat.dev, &alarm_attr); + power_supply_unregister(&battery->bat); +} + static int acpi_battery_update(struct acpi_battery *battery) { - int saved_present = acpi_battery_present(battery); int result = acpi_battery_get_status(battery); - if (result || !acpi_battery_present(battery)) + if (result) return result; - if (saved_present != acpi_battery_present(battery) || - !battery->update_time) { - battery->update_time = 0; - result = acpi_battery_get_info(battery); - if (result) - return result; - if (battery->power_unit) { - battery->bat.properties = charge_battery_props; - battery->bat.num_properties = - ARRAY_SIZE(charge_battery_props); - } else { - battery->bat.properties = energy_battery_props; - battery->bat.num_properties = - ARRAY_SIZE(energy_battery_props); - } - acpi_battery_init_alarm(battery); + if (!acpi_battery_present(battery)) { + sysfs_remove_battery(battery); + return 0; } + if (!battery->bat.dev) + sysfs_add_battery(battery); return acpi_battery_get_state(battery); } @@ -687,33 +739,6 @@ static void acpi_battery_remove_fs(struct acpi_device *device) #endif -static ssize_t acpi_battery_alarm_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); - return sprintf(buf, "%d\n", battery->alarm * 1000); -} - -static ssize_t acpi_battery_alarm_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - unsigned long x; - struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); - if (sscanf(buf, "%ld\n", &x) == 1) - battery->alarm = x/1000; - if (acpi_battery_present(battery)) - acpi_battery_set_alarm(battery); - return count; -} - -static struct device_attribute alarm_attr = { - .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE}, - .show = acpi_battery_alarm_show, - .store = acpi_battery_alarm_store, -}; - /* -------------------------------------------------------------------------- Driver Interface -------------------------------------------------------------------------- */ @@ -731,7 +756,9 @@ static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) acpi_bus_generate_netlink_event(device->pnp.device_class, device->dev.bus_id, event, acpi_battery_present(battery)); - kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE); + /* acpi_batter_update could remove power_supply object */ + if (battery->bat.dev) + kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE); } static int acpi_battery_add(struct acpi_device *device) @@ -755,11 +782,6 @@ static int acpi_battery_add(struct acpi_device *device) if (result) goto end; #endif - battery->bat.name = acpi_device_bid(device); - battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; - battery->bat.get_property = acpi_battery_get_property; - result = power_supply_register(&battery->device->dev, &battery->bat); - result = device_create_file(battery->bat.dev, &alarm_attr); status = acpi_install_notify_handler(device->handle, ACPI_ALL_NOTIFY, acpi_battery_notify, battery); @@ -795,10 +817,7 @@ static int acpi_battery_remove(struct acpi_device *device, int type) #ifdef CONFIG_ACPI_PROCFS acpi_battery_remove_fs(device); #endif - if (battery->bat.dev) { - device_remove_file(battery->bat.dev, &alarm_attr); - power_supply_unregister(&battery->bat); - } + sysfs_remove_battery(battery); mutex_destroy(&battery->lock); kfree(battery); return 0; @@ -812,6 +831,7 @@ static int acpi_battery_resume(struct acpi_device *device) return -EINVAL; battery = acpi_driver_data(device); battery->update_time = 0; + acpi_battery_update(battery); return 0; } -- cgit v1.2.3-58-ga151 From 0bde7eee9489cc7cce08cf6eba05b4f42a6b2334 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Sun, 28 Oct 2007 15:33:10 +0300 Subject: ACPI: battery: Support for non-spec name for LiIon technology Support Li-Ion as possible name for technology. Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/battery.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/acpi') diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index 489d3385efe4..74caa07ad351 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -125,6 +125,8 @@ static int acpi_battery_technology(struct acpi_battery *battery) return POWER_SUPPLY_TECHNOLOGY_NiMH; if (!strcasecmp("LION", battery->type)) return POWER_SUPPLY_TECHNOLOGY_LION; + if (!strcasecmp("LI-ION", battery->type)) + return POWER_SUPPLY_TECHNOLOGY_LION; if (!strcasecmp("LiP", battery->type)) return POWER_SUPPLY_TECHNOLOGY_LIPO; return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; -- cgit v1.2.3-58-ga151 From 106449e870b3069c049a3486ae7b47995351270c Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 29 Oct 2007 23:29:40 +0300 Subject: ACPI: Battery: Allow extract string from integer Some machines return integer instead of expected string. Signed-off-by: Alexey Starikovskiy Tested-by: Andrey Borzenkov Tested-by: Frans Pop Signed-off-by: Len Brown --- drivers/acpi/battery.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index 74caa07ad351..c2ce0ad21693 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -262,7 +262,7 @@ static int extract_package(struct acpi_battery *battery, union acpi_object *package, struct acpi_offsets *offsets, int num) { - int i, *x; + int i; union acpi_object *element; if (package->type != ACPI_TYPE_PACKAGE) return -EFAULT; @@ -271,16 +271,21 @@ static int extract_package(struct acpi_battery *battery, return -EFAULT; element = &package->package.elements[i]; if (offsets[i].mode) { - if (element->type != ACPI_TYPE_STRING && - element->type != ACPI_TYPE_BUFFER) - return -EFAULT; - strncpy((u8 *)battery + offsets[i].offset, - element->string.pointer, 32); + u8 *ptr = (u8 *)battery + offsets[i].offset; + if (element->type == ACPI_TYPE_STRING || + element->type == ACPI_TYPE_BUFFER) + strncpy(ptr, element->string.pointer, 32); + else if (element->type == ACPI_TYPE_INTEGER) { + strncpy(ptr, (u8 *)&element->integer.value, + sizeof(acpi_integer)); + ptr[sizeof(acpi_integer)] = 0; + } else return -EFAULT; } else { - if (element->type != ACPI_TYPE_INTEGER) - return -EFAULT; - x = (int *)((u8 *)battery + offsets[i].offset); - *x = element->integer.value; + if (element->type == ACPI_TYPE_INTEGER) { + int *x = (int *)((u8 *)battery + + offsets[i].offset); + *x = element->integer.value; + } else return -EFAULT; } } return 0; -- cgit v1.2.3-58-ga151 From 5527c8bee27fa063dcec0e020fb8c242ba4270c2 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 29 Oct 2007 17:08:59 -0400 Subject: ACPI: use select POWER_SUPPLY for AC, BATTERY and SBS POWER_SUPPLY is needed for AC, battery, and SBS sysfs support. Use 'select' instead of 'depends on', as it is will not be selected by anything else, leading to confusion. Signed-off-by: Alexey Starikovskiy Tested-by: Frans Pop Signed-off-by: Andrew Morton Signed-off-by: Len Brown --- drivers/acpi/Kconfig | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 5d0e26a5c34c..ecd87d7aa9f6 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -88,7 +88,8 @@ config ACPI_PROC_EVENT config ACPI_AC tristate "AC Adapter" - depends on X86 && POWER_SUPPLY + depends on X86 + select POWER_SUPPLY default y help This driver adds support for the AC Adapter object, which indicates @@ -97,7 +98,8 @@ config ACPI_AC config ACPI_BATTERY tristate "Battery" - depends on X86 && POWER_SUPPLY + depends on X86 + select POWER_SUPPLY default y help This driver adds support for battery information through @@ -352,7 +354,7 @@ config ACPI_HOTPLUG_MEMORY config ACPI_SBS tristate "Smart Battery System" depends on X86 - depends on POWER_SUPPLY + select POWER_SUPPLY help This driver adds support for the Smart Battery System, another type of access to battery information, found on some laptops. -- cgit v1.2.3-58-ga151