From 812d73473af23dd738afa83ab77cd6c733b3721f Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 6 Oct 2009 12:18:05 +0000 Subject: isdn: accept CAPI Informational Info values as success Info values in the 0x00xx range are defined in the CAPI standard as "Informational, message processed successfully". Therefore a CONNECT_B3_CONF message with an Info value in that range should open an NCCI just as with Info==0. Impact: minor bugfix Signed-off-by: Tilman Schmidt Acked-by: Karsten Keil Signed-off-by: David S. Miller --- drivers/isdn/capi/capi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/isdn') diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c index 2d8352419c0d..65bf91e16a42 100644 --- a/drivers/isdn/capi/capi.c +++ b/drivers/isdn/capi/capi.c @@ -603,7 +603,7 @@ static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { u16 info = CAPIMSG_U16(skb->data, 12); // Info field - if (info == 0) { + if ((info & 0xff00) == 0) { mutex_lock(&cdev->ncci_list_mtx); capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); mutex_unlock(&cdev->ncci_list_mtx); -- cgit v1.2.3-58-ga151 From e48470217d1822e3566b657002c6f79bd7a77345 Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 6 Oct 2009 12:18:10 +0000 Subject: isdn: avoid races in capidrv In several places, capidrv sends a CAPI message to the ISDN device and then updates its internal state accordingly. If the response message from the device arrives before the state is updated, it may be rejected or processed incorrectly. Avoid these races by updating the state before emitting the message. Impact: bugfix Signed-off-by: Tilman Schmidt Acked-by: Karsten Keil Signed-off-by: David S. Miller --- drivers/isdn/capi/capidrv.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) (limited to 'drivers/isdn') diff --git a/drivers/isdn/capi/capidrv.c b/drivers/isdn/capi/capidrv.c index 650120261abf..4921eae71acb 100644 --- a/drivers/isdn/capi/capidrv.c +++ b/drivers/isdn/capi/capidrv.c @@ -671,8 +671,8 @@ static void n0(capidrv_contr * card, capidrv_ncci * ncci) NULL, /* Useruserdata */ /* $$$$ */ NULL /* Facilitydataarray */ ); - send_message(card, &cmsg); plci_change_state(card, ncci->plcip, EV_PLCI_DISCONNECT_REQ); + send_message(card, &cmsg); cmd.command = ISDN_STAT_BHUP; cmd.driver = card->myid; @@ -924,8 +924,8 @@ static void handle_incoming_call(capidrv_contr * card, _cmsg * cmsg) */ capi_cmsg_answer(cmsg); cmsg->Reject = 1; /* ignore */ - send_message(card, cmsg); plci_change_state(card, plcip, EV_PLCI_CONNECT_REJECT); + send_message(card, cmsg); printk(KERN_INFO "capidrv-%d: incoming call %s,%d,%d,%s ignored\n", card->contrnr, cmd.parm.setup.phone, @@ -974,8 +974,8 @@ static void handle_incoming_call(capidrv_contr * card, _cmsg * cmsg) case 2: /* Call will be rejected. */ capi_cmsg_answer(cmsg); cmsg->Reject = 2; /* reject call, normal call clearing */ - send_message(card, cmsg); plci_change_state(card, plcip, EV_PLCI_CONNECT_REJECT); + send_message(card, cmsg); break; default: @@ -983,8 +983,8 @@ static void handle_incoming_call(capidrv_contr * card, _cmsg * cmsg) capi_cmsg_answer(cmsg); cmsg->Reject = 8; /* reject call, destination out of order */ - send_message(card, cmsg); plci_change_state(card, plcip, EV_PLCI_CONNECT_REJECT); + send_message(card, cmsg); break; } return; @@ -1020,8 +1020,8 @@ static void handle_plci(_cmsg * cmsg) card->bchans[plcip->chan].disconnecting = 1; plci_change_state(card, plcip, EV_PLCI_DISCONNECT_IND); capi_cmsg_answer(cmsg); - send_message(card, cmsg); plci_change_state(card, plcip, EV_PLCI_DISCONNECT_RESP); + send_message(card, cmsg); break; case CAPI_DISCONNECT_CONF: /* plci */ @@ -1078,8 +1078,8 @@ static void handle_plci(_cmsg * cmsg) if (card->bchans[plcip->chan].incoming) { capi_cmsg_answer(cmsg); - send_message(card, cmsg); plci_change_state(card, plcip, EV_PLCI_CONNECT_ACTIVE_IND); + send_message(card, cmsg); } else { capidrv_ncci *nccip; capi_cmsg_answer(cmsg); @@ -1098,13 +1098,14 @@ static void handle_plci(_cmsg * cmsg) NULL /* NCPI */ ); nccip->msgid = cmsg->Messagenumber; + plci_change_state(card, plcip, + EV_PLCI_CONNECT_ACTIVE_IND); + ncci_change_state(card, nccip, EV_NCCI_CONNECT_B3_REQ); send_message(card, cmsg); cmd.command = ISDN_STAT_DCONN; cmd.driver = card->myid; cmd.arg = plcip->chan; card->interface.statcallb(&cmd); - plci_change_state(card, plcip, EV_PLCI_CONNECT_ACTIVE_IND); - ncci_change_state(card, nccip, EV_NCCI_CONNECT_B3_REQ); } break; @@ -1193,8 +1194,8 @@ static void handle_ncci(_cmsg * cmsg) goto notfound; capi_cmsg_answer(cmsg); - send_message(card, cmsg); ncci_change_state(card, nccip, EV_NCCI_CONNECT_B3_ACTIVE_IND); + send_message(card, cmsg); cmd.command = ISDN_STAT_BCONN; cmd.driver = card->myid; @@ -1222,8 +1223,8 @@ static void handle_ncci(_cmsg * cmsg) 0, /* Reject */ NULL /* NCPI */ ); - send_message(card, cmsg); ncci_change_state(card, nccip, EV_NCCI_CONNECT_B3_RESP); + send_message(card, cmsg); break; } printk(KERN_ERR "capidrv-%d: no mem for ncci, sorry\n", card->contrnr); @@ -1299,8 +1300,8 @@ static void handle_ncci(_cmsg * cmsg) card->bchans[nccip->chan].disconnecting = 1; ncci_change_state(card, nccip, EV_NCCI_DISCONNECT_B3_IND); capi_cmsg_answer(cmsg); - send_message(card, cmsg); ncci_change_state(card, nccip, EV_NCCI_DISCONNECT_B3_RESP); + send_message(card, cmsg); break; case CAPI_DISCONNECT_B3_CONF: /* ncci */ @@ -2014,8 +2015,8 @@ static void send_listen(capidrv_contr *card) card->cipmask, card->cipmask2, NULL, NULL); - send_message(card, &cmdcmsg); listen_change_state(card, EV_LISTEN_REQ); + send_message(card, &cmdcmsg); } static void listentimerfunc(unsigned long x) -- cgit v1.2.3-58-ga151 From 9803f79695f552265d5c70f148876b5e2a77dd6a Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 6 Oct 2009 12:18:15 +0000 Subject: isdn: make capidrv module parameter "debugmode" writeable Being able to change the debugmode module parameter of capidrv on the fly is quite useful for debugging and doesn't do any harm. Signed-off-by: Tilman Schmidt Signed-off-by: David S. Miller --- drivers/isdn/capi/capidrv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/isdn') diff --git a/drivers/isdn/capi/capidrv.c b/drivers/isdn/capi/capidrv.c index 4921eae71acb..3e6d17f42a98 100644 --- a/drivers/isdn/capi/capidrv.c +++ b/drivers/isdn/capi/capidrv.c @@ -40,7 +40,7 @@ static int debugmode = 0; MODULE_DESCRIPTION("CAPI4Linux: Interface to ISDN4Linux"); MODULE_AUTHOR("Carsten Paeth"); MODULE_LICENSE("GPL"); -module_param(debugmode, uint, 0); +module_param(debugmode, uint, S_IRUGO|S_IWUSR); /* -------- type definitions ----------------------------------------- */ -- cgit v1.2.3-58-ga151 From 3305adffc556f7998b40c31afcef4c8755ce919a Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 6 Oct 2009 12:18:26 +0000 Subject: gigaset: fix reject/hangup handling Signal D channel disconnect in a few cases where it was missed, including when an incoming call is disconnected before it was accepted. Impact: error handling improvement Signed-off-by: Tilman Schmidt Signed-off-by: David S. Miller --- drivers/isdn/gigaset/ev-layer.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/isdn') diff --git a/drivers/isdn/gigaset/ev-layer.c b/drivers/isdn/gigaset/ev-layer.c index 2d91049571a4..ff2ec2ce2168 100644 --- a/drivers/isdn/gigaset/ev-layer.c +++ b/drivers/isdn/gigaset/ev-layer.c @@ -707,6 +707,11 @@ static void disconnect(struct at_state_t **at_state_p) if (bcs) { /* B channel assigned: invoke hardware specific handler */ cs->ops->close_bchannel(bcs); + /* notify LL */ + if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) { + bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL); + gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DHUP); + } } else { /* no B channel assigned: just deallocate */ spin_lock_irqsave(&cs->lock, flags); -- cgit v1.2.3-58-ga151 From ee239d9901c13040598f6c46d5017869c6d14e2e Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 6 Oct 2009 12:18:31 +0000 Subject: gigaset: linearize skb The code of the Gigaset driver assumes that sk_buff-s coming from the ISDN4Linux subsystem are always linear. Explicitly calling skb_linearize() is cheap if they are, but much more robust in case they ever aren't. Impact: robustness improvement Signed-off-by: Tilman Schmidt Signed-off-by: David S. Miller --- drivers/isdn/gigaset/i4l.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/isdn') diff --git a/drivers/isdn/gigaset/i4l.c b/drivers/isdn/gigaset/i4l.c index 9b22f9cf2f33..322f16ebc6ec 100644 --- a/drivers/isdn/gigaset/i4l.c +++ b/drivers/isdn/gigaset/i4l.c @@ -51,6 +51,12 @@ static int writebuf_from_LL(int driverID, int channel, int ack, return -ENODEV; } bcs = &cs->bcs[channel]; + + /* can only handle linear sk_buffs */ + if (skb_linearize(skb) < 0) { + dev_err(cs->dev, "%s: skb_linearize failed\n", __func__); + return -ENOMEM; + } len = skb->len; gig_dbg(DEBUG_LLDATA, -- cgit v1.2.3-58-ga151 From eb4459ff3a3bdedb7a4da03fb9da2ba800b19f74 Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 6 Oct 2009 12:18:36 +0000 Subject: gigaset: handle isoc frame errors more gracefully Don't drop the remainder of an URB if an isochronous frame has an error. Impact: error handling improvement Signed-off-by: Tilman Schmidt Signed-off-by: David S. Miller --- drivers/isdn/gigaset/bas-gigaset.c | 18 +++++++----------- 1 file changed, 7 insertions(+), 11 deletions(-) (limited to 'drivers/isdn') diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c index 781c4041f7b0..9e7108a3109b 100644 --- a/drivers/isdn/gigaset/bas-gigaset.c +++ b/drivers/isdn/gigaset/bas-gigaset.c @@ -1331,28 +1331,24 @@ static void read_iso_tasklet(unsigned long data) rcvbuf = urb->transfer_buffer; totleft = urb->actual_length; for (frame = 0; totleft > 0 && frame < BAS_NUMFRAMES; frame++) { - if (unlikely(urb->iso_frame_desc[frame].status)) { + numbytes = urb->iso_frame_desc[frame].actual_length; + if (unlikely(urb->iso_frame_desc[frame].status)) dev_warn(cs->dev, - "isochronous read: frame %d: %s\n", - frame, + "isochronous read: frame %d[%d]: %s\n", + frame, numbytes, get_usb_statmsg( urb->iso_frame_desc[frame].status)); - break; - } - numbytes = urb->iso_frame_desc[frame].actual_length; - if (unlikely(numbytes > BAS_MAXFRAME)) { + if (unlikely(numbytes > BAS_MAXFRAME)) dev_warn(cs->dev, "isochronous read: frame %d: " "numbytes (%d) > BAS_MAXFRAME\n", frame, numbytes); - break; - } if (unlikely(numbytes > totleft)) { dev_warn(cs->dev, "isochronous read: frame %d: " "numbytes (%d) > totleft (%d)\n", frame, numbytes, totleft); - break; + numbytes = totleft; } offset = urb->iso_frame_desc[frame].offset; if (unlikely(offset + numbytes > BAS_INBUFSIZE)) { @@ -1361,7 +1357,7 @@ static void read_iso_tasklet(unsigned long data) "offset (%d) + numbytes (%d) " "> BAS_INBUFSIZE\n", frame, offset, numbytes); - break; + numbytes = BAS_INBUFSIZE - offset; } gigaset_isoc_receive(rcvbuf + offset, numbytes, bcs); totleft -= numbytes; -- cgit v1.2.3-58-ga151 From 2038724cc785b3b186f0dfb0f8bfcea6468d9c4f Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 6 Oct 2009 12:18:41 +0000 Subject: gigaset: announce if built with debugging Mention in the driver load announcement whether the driver was built with debugging messages enabled, to facilitate support. Impact: informational message Signed-off-by: Tilman Schmidt Signed-off-by: David S. Miller --- drivers/isdn/gigaset/common.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/isdn') diff --git a/drivers/isdn/gigaset/common.c b/drivers/isdn/gigaset/common.c index e4141bf8b2f3..edbcaa3887f1 100644 --- a/drivers/isdn/gigaset/common.c +++ b/drivers/isdn/gigaset/common.c @@ -22,6 +22,12 @@ #define DRIVER_AUTHOR "Hansjoerg Lipp , Tilman Schmidt , Stefan Eilers" #define DRIVER_DESC "Driver for Gigaset 307x" +#ifdef CONFIG_GIGASET_DEBUG +#define DRIVER_DESC_DEBUG " (debug build)" +#else +#define DRIVER_DESC_DEBUG "" +#endif + /* Module parameters */ int gigaset_debuglevel = DEBUG_DEFAULT; EXPORT_SYMBOL_GPL(gigaset_debuglevel); @@ -1110,7 +1116,7 @@ static int __init gigaset_init_module(void) if (gigaset_debuglevel == 1) gigaset_debuglevel = DEBUG_DEFAULT; - pr_info(DRIVER_DESC "\n"); + pr_info(DRIVER_DESC DRIVER_DESC_DEBUG "\n"); return 0; } -- cgit v1.2.3-58-ga151 From 05eae94f2a2b6a05f10495c77162d0fecae67264 Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 6 Oct 2009 12:18:46 +0000 Subject: gigaset: fix device ERROR response handling Clear out pending command that got rejected with 'ERROR' response. This fixes the bug where unloading the driver module would hang with the message: "gigaset: not searching scheduled commands: busy" after a device communication error. Impact: error handling bugfix Signed-off-by: Tilman Schmidt Signed-off-by: David S. Miller --- drivers/isdn/gigaset/ev-layer.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) (limited to 'drivers/isdn') diff --git a/drivers/isdn/gigaset/ev-layer.c b/drivers/isdn/gigaset/ev-layer.c index ff2ec2ce2168..926370a74981 100644 --- a/drivers/isdn/gigaset/ev-layer.c +++ b/drivers/isdn/gigaset/ev-layer.c @@ -207,7 +207,6 @@ struct reply_t gigaset_tab_nocid[] = /* leave dle mode */ {RSP_INIT, 0, 0,SEQ_DLE0, 201, 5, {0}, "^SDLE=0\r"}, {RSP_OK, 201,201, -1, 202,-1}, - //{RSP_ZDLE, 202,202, 0, 202, 0, {ACT_ERROR}},//DELETE {RSP_ZDLE, 202,202, 0, 0, 0, {ACT_DLE0}}, {RSP_NODEV, 200,249, -1, 0, 0, {ACT_FAKEDLE0}}, {RSP_ERROR, 200,249, -1, 0, 0, {ACT_FAILDLE0}}, @@ -265,6 +264,7 @@ struct reply_t gigaset_tab_nocid[] = {EV_SHUTDOWN, -1, -1, -1, -1,-1, {ACT_SHUTDOWN}}, //FIXME /* misc. */ + {RSP_ERROR, -1, -1, -1, -1, -1, {ACT_ERROR} }, {RSP_EMPTY, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME {RSP_ZCFGT, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME {RSP_ZCFG, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME @@ -328,10 +328,9 @@ struct reply_t gigaset_tab_cid[] = {RSP_INIT, -1, -1,SEQ_HUP, 401, 5, {0}, "+VLS=0\r"}, /* hang up */ //-1,-1? {RSP_OK, 401,401, -1, 402, 5}, {RSP_ZVLS, 402,402, 0, 403, 5}, - {RSP_ZSAU, 403,403,ZSAU_DISCONNECT_REQ, -1,-1, {ACT_DEBUG}}, /* if not remote hup */ - //{RSP_ZSAU, 403,403,ZSAU_NULL, 401, 0, {ACT_ERROR}}, //DELETE//FIXME -> DLE0 // should we do this _before_ hanging up for base driver? - {RSP_ZSAU, 403,403,ZSAU_NULL, 0, 0, {ACT_DISCONNECT}}, //FIXME -> DLE0 // should we do this _before_ hanging up for base driver? - {RSP_NODEV, 401,403, -1, 0, 0, {ACT_FAKEHUP}}, //FIXME -> DLE0 // should we do this _before_ hanging up for base driver? + {RSP_ZSAU, 403, 403, ZSAU_DISCONNECT_REQ, -1, -1, {ACT_DEBUG} }, + {RSP_ZSAU, 403, 403, ZSAU_NULL, 0, 0, {ACT_DISCONNECT} }, + {RSP_NODEV, 401, 403, -1, 0, 0, {ACT_FAKEHUP} }, {RSP_ERROR, 401,401, -1, 0, 0, {ACT_ABORTHUP}}, {EV_TIMEOUT, 401,403, -1, 0, 0, {ACT_ABORTHUP}}, @@ -1434,11 +1433,12 @@ static void do_action(int action, struct cardstate *cs, cs->gotfwver = -1; dev_err(cs->dev, "could not read firmware version.\n"); break; -#ifdef CONFIG_GIGASET_DEBUG case ACT_ERROR: - *p_genresp = 1; - *p_resp_code = RSP_ERROR; + gig_dbg(DEBUG_ANY, "%s: ERROR response in ConState %d", + __func__, at_state->ConState); + cs->cur_at_seq = SEQ_NONE; break; +#ifdef CONFIG_GIGASET_DEBUG case ACT_TEST: { static int count = 3; //2; //1; -- cgit v1.2.3-58-ga151 From b5f581d55f7fef8d18773386faaa4304dbc2454b Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 6 Oct 2009 12:18:51 +0000 Subject: gigaset: improve error recovery When the Gigaset base stops responding, try resetting the USB connection to recover. Impact: error handling improvement Signed-off-by: Tilman Schmidt Signed-off-by: David S. Miller --- drivers/isdn/gigaset/bas-gigaset.c | 69 +++++++++++++++++++++++++------------- 1 file changed, 45 insertions(+), 24 deletions(-) (limited to 'drivers/isdn') diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c index 9e7108a3109b..5ed1d99eb9f3 100644 --- a/drivers/isdn/gigaset/bas-gigaset.c +++ b/drivers/isdn/gigaset/bas-gigaset.c @@ -134,6 +134,7 @@ struct bas_cardstate { #define BS_ATRDPEND 0x040 /* urb_cmd_in in use */ #define BS_ATWRPEND 0x080 /* urb_cmd_out in use */ #define BS_SUSPEND 0x100 /* USB port suspended */ +#define BS_RESETTING 0x200 /* waiting for HD_RESET_INTERRUPT_PIPE_ACK */ static struct gigaset_driver *driver = NULL; @@ -319,6 +320,21 @@ static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag) return -EINVAL; } +/* set/clear bits in base connection state, return previous state + */ +static inline int update_basstate(struct bas_cardstate *ucs, + int set, int clear) +{ + unsigned long flags; + int state; + + spin_lock_irqsave(&ucs->lock, flags); + state = ucs->basstate; + ucs->basstate = (state & ~clear) | set; + spin_unlock_irqrestore(&ucs->lock, flags); + return state; +} + /* error_hangup * hang up any existing connection because of an unrecoverable error * This function may be called from any context and takes care of scheduling @@ -350,12 +366,9 @@ static inline void error_hangup(struct bc_state *bcs) */ static inline void error_reset(struct cardstate *cs) { - /* close AT command channel to recover (ignore errors) */ - req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT); - - //FIXME try to recover without bothering the user - dev_err(cs->dev, - "unrecoverable error - please disconnect Gigaset base to reset\n"); + /* reset interrupt pipe to recover (ignore errors) */ + update_basstate(cs->hw.bas, BS_RESETTING, 0); + req_submit(cs->bcs, HD_RESET_INTERRUPT_PIPE, 0, BAS_TIMEOUT); } /* check_pending @@ -398,8 +411,13 @@ static void check_pending(struct bas_cardstate *ucs) case HD_DEVICE_INIT_ACK: /* no reply expected */ ucs->pending = 0; break; - /* HD_READ_ATMESSAGE, HD_WRITE_ATMESSAGE, HD_RESET_INTERRUPTPIPE - * are handled separately and should never end up here + case HD_RESET_INTERRUPT_PIPE: + if (!(ucs->basstate & BS_RESETTING)) + ucs->pending = 0; + break; + /* + * HD_READ_ATMESSAGE and HD_WRITE_ATMESSAGE are handled separately + * and should never end up here */ default: dev_warn(&ucs->interface->dev, @@ -449,21 +467,6 @@ static void cmd_in_timeout(unsigned long data) error_reset(cs); } -/* set/clear bits in base connection state, return previous state - */ -inline static int update_basstate(struct bas_cardstate *ucs, - int set, int clear) -{ - unsigned long flags; - int state; - - spin_lock_irqsave(&ucs->lock, flags); - state = ucs->basstate; - ucs->basstate = (state & ~clear) | set; - spin_unlock_irqrestore(&ucs->lock, flags); - return state; -} - /* read_ctrl_callback * USB completion handler for control pipe input * called by the USB subsystem in interrupt context @@ -762,7 +765,8 @@ static void read_int_callback(struct urb *urb) break; case HD_RESET_INTERRUPT_PIPE_ACK: - gig_dbg(DEBUG_USBREQ, "HD_RESET_INTERRUPT_PIPE_ACK"); + update_basstate(ucs, 0, BS_RESETTING); + dev_notice(cs->dev, "interrupt pipe reset\n"); break; case HD_SUSPEND_END: @@ -1429,6 +1433,7 @@ static void req_timeout(unsigned long data) case HD_CLOSE_ATCHANNEL: dev_err(bcs->cs->dev, "timeout closing AT channel\n"); + error_reset(bcs->cs); break; case HD_CLOSE_B2CHANNEL: @@ -1438,6 +1443,13 @@ static void req_timeout(unsigned long data) error_reset(bcs->cs); break; + case HD_RESET_INTERRUPT_PIPE: + /* error recovery escalation */ + dev_err(bcs->cs->dev, + "reset interrupt pipe timeout, attempting USB reset\n"); + usb_queue_reset_device(bcs->cs->hw.bas->interface); + break; + default: dev_warn(bcs->cs->dev, "request 0x%02x timed out, clearing\n", pending); @@ -1930,6 +1942,15 @@ static int gigaset_write_cmd(struct cardstate *cs, goto notqueued; } + /* translate "+++" escape sequence sent as a single separate command + * into "close AT channel" command for error recovery + * The next command will reopen the AT channel automatically. + */ + if (len == 3 && !memcmp(buf, "+++", 3)) { + rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT); + goto notqueued; + } + if (len > IF_WRITEBUF) len = IF_WRITEBUF; if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) { -- cgit v1.2.3-58-ga151 From cd7f50e25156711f16ce253c49c91adc4368849c Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 6 Oct 2009 12:18:56 +0000 Subject: gigaset: correct debugging output selection Dump payload data consistently only when DEBUG_STREAM_DUMP debug bit is set. Impact: debugging aid Signed-off-by: Tilman Schmidt Signed-off-by: David S. Miller --- drivers/isdn/gigaset/isocdata.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'drivers/isdn') diff --git a/drivers/isdn/gigaset/isocdata.c b/drivers/isdn/gigaset/isocdata.c index bed38fcc432b..7fd32f07fb47 100644 --- a/drivers/isdn/gigaset/isocdata.c +++ b/drivers/isdn/gigaset/isocdata.c @@ -429,7 +429,7 @@ static inline int hdlc_buildframe(struct isowbuf_t *iwb, return -EAGAIN; } - dump_bytes(DEBUG_STREAM, "snd data", in, count); + dump_bytes(DEBUG_STREAM_DUMP, "snd data", in, count); /* bitstuff and checksum input data */ fcs = PPP_INITFCS; @@ -448,7 +448,6 @@ static inline int hdlc_buildframe(struct isowbuf_t *iwb, /* put closing flag and repeat byte for flag idle */ isowbuf_putflag(iwb); end = isowbuf_donewrite(iwb); - dump_bytes(DEBUG_STREAM_DUMP, "isowbuf", iwb->data, end + 1); return end; } @@ -482,6 +481,8 @@ static inline int trans_buildframe(struct isowbuf_t *iwb, } gig_dbg(DEBUG_STREAM, "put %d bytes", count); + dump_bytes(DEBUG_STREAM_DUMP, "snd data", in, count); + write = iwb->write; do { c = bitrev8(*in++); @@ -583,7 +584,7 @@ static inline void hdlc_done(struct bc_state *bcs) procskb->tail -= 2; gig_dbg(DEBUG_ISO, "%s: good frame (%d octets)", __func__, procskb->len); - dump_bytes(DEBUG_STREAM, + dump_bytes(DEBUG_STREAM_DUMP, "rcv data", procskb->data, procskb->len); bcs->hw.bas->goodbytes += procskb->len; gigaset_rcv_skb(procskb, bcs->cs, bcs); @@ -878,6 +879,8 @@ static inline void trans_receive(unsigned char *src, unsigned count, dobytes--; } if (dobytes == 0) { + dump_bytes(DEBUG_STREAM_DUMP, + "rcv data", skb->data, skb->len); gigaset_rcv_skb(skb, bcs->cs, bcs); bcs->skb = skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN); if (!skb) { -- cgit v1.2.3-58-ga151 From 1cec9727fbfd7baff2034796154be1a0297bcedd Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Tue, 6 Oct 2009 12:19:01 +0000 Subject: gigaset: add kerneldoc comments Add kerneldoc comments to some functions in the Gigaset driver. Impact: documentation Signed-off-by: Tilman Schmidt Signed-off-by: David S. Miller --- drivers/isdn/gigaset/asyncdata.c | 28 +++++---- drivers/isdn/gigaset/common.c | 126 ++++++++++++++++++++++++++++++++------- drivers/isdn/gigaset/ev-layer.c | 9 ++- drivers/isdn/gigaset/i4l.c | 17 ++++++ drivers/isdn/gigaset/interface.c | 9 +++ drivers/isdn/gigaset/isocdata.c | 21 +++---- 6 files changed, 166 insertions(+), 44 deletions(-) (limited to 'drivers/isdn') diff --git a/drivers/isdn/gigaset/asyncdata.c b/drivers/isdn/gigaset/asyncdata.c index 234cc5d53312..44a58e6f8f65 100644 --- a/drivers/isdn/gigaset/asyncdata.c +++ b/drivers/isdn/gigaset/asyncdata.c @@ -334,7 +334,14 @@ static inline int iraw_loop(unsigned char c, unsigned char *src, int numbytes, return startbytes - numbytes; } -/* process a block of data received from the device +/** + * gigaset_m10x_input() - process a block of data received from the device + * @inbuf: received data and device descriptor structure. + * + * Called by hardware module {ser,usb}_gigaset with a block of received + * bytes. Separates the bytes received over the serial data channel into + * user data and command replies (locked/unlocked) according to the + * current state of the interface. */ void gigaset_m10x_input(struct inbuf_t *inbuf) { @@ -543,16 +550,17 @@ static struct sk_buff *iraw_encode(struct sk_buff *skb, int head, int tail) return iraw_skb; } -/* gigaset_send_skb - * called by common.c to queue an skb for sending - * and start transmission if necessary - * parameters: - * B Channel control structure - * skb +/** + * gigaset_m10x_send_skb() - queue an skb for sending + * @bcs: B channel descriptor structure. + * @skb: data to send. + * + * Called by i4l.c to encode and queue an skb for sending, and start + * transmission if necessary. + * * Return value: - * number of bytes accepted for sending - * (skb->len if ok, 0 if out of buffer space) - * or error code (< 0, eg. -EINVAL) + * number of bytes accepted for sending (skb->len) if ok, + * error code < 0 (eg. -ENOMEM) on error */ int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb) { diff --git a/drivers/isdn/gigaset/common.c b/drivers/isdn/gigaset/common.c index edbcaa3887f1..33dcd8d72b7c 100644 --- a/drivers/isdn/gigaset/common.c +++ b/drivers/isdn/gigaset/common.c @@ -38,6 +38,17 @@ MODULE_PARM_DESC(debug, "debug level"); #define VALID_MINOR 0x01 #define VALID_ID 0x02 +/** + * gigaset_dbg_buffer() - dump data in ASCII and hex for debugging + * @level: debugging level. + * @msg: message prefix. + * @len: number of bytes to dump. + * @buf: data to dump. + * + * If the current debugging level includes one of the bits set in @level, + * @len bytes starting at @buf are logged to dmesg at KERN_DEBUG prio, + * prefixed by the text @msg. + */ void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg, size_t len, const unsigned char *buf) { @@ -280,6 +291,20 @@ static void clear_events(struct cardstate *cs) spin_unlock_irqrestore(&cs->ev_lock, flags); } +/** + * gigaset_add_event() - add event to device event queue + * @cs: device descriptor structure. + * @at_state: connection state structure. + * @type: event type. + * @ptr: pointer parameter for event. + * @parameter: integer parameter for event. + * @arg: pointer parameter for event. + * + * Allocate an event queue entry from the device's event queue, and set it up + * with the parameters given. + * + * Return value: added event + */ struct event_t *gigaset_add_event(struct cardstate *cs, struct at_state_t *at_state, int type, void *ptr, int parameter, void *arg) @@ -404,6 +429,15 @@ static void make_invalid(struct cardstate *cs, unsigned mask) spin_unlock_irqrestore(&drv->lock, flags); } +/** + * gigaset_freecs() - free all associated ressources of a device + * @cs: device descriptor structure. + * + * Stops all tasklets and timers, unregisters the device from all + * subsystems it was registered to, deallocates the device structure + * @cs and all structures referenced from it. + * Operations on the device should be stopped before calling this. + */ void gigaset_freecs(struct cardstate *cs) { int i; @@ -512,7 +546,12 @@ static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct bc_state *bcs, inbuf->inputstate = inputstate; } -/* append received bytes to inbuf */ +/** + * gigaset_fill_inbuf() - append received data to input buffer + * @inbuf: buffer structure. + * @src: received data. + * @numbytes: number of bytes received. + */ int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src, unsigned numbytes) { @@ -612,20 +651,22 @@ static struct bc_state *gigaset_initbcs(struct bc_state *bcs, return NULL; } -/* gigaset_initcs +/** + * gigaset_initcs() - initialize device structure + * @drv: hardware driver the device belongs to + * @channels: number of B channels supported by device + * @onechannel: !=0 if B channel data and AT commands share one + * communication channel (M10x), + * ==0 if B channels have separate communication channels (base) + * @ignoreframes: number of frames to ignore after setting up B channel + * @cidmode: !=0: start in CallID mode + * @modulename: name of driver module for LL registration + * * Allocate and initialize cardstate structure for Gigaset driver * Calls hardware dependent gigaset_initcshw() function * Calls B channel initialization function gigaset_initbcs() for each B channel - * parameters: - * drv hardware driver the device belongs to - * channels number of B channels supported by device - * onechannel !=0: B channel data and AT commands share one - * communication channel - * ==0: B channels have separate communication channels - * ignoreframes number of frames to ignore after setting up B channel - * cidmode !=0: start in CallID mode - * modulename name of driver module (used for I4L registration) - * return value: + * + * Return value: * pointer to cardstate structure */ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels, @@ -843,6 +884,17 @@ static void cleanup_cs(struct cardstate *cs) } +/** + * gigaset_start() - start device operations + * @cs: device descriptor structure. + * + * Prepares the device for use by setting up communication parameters, + * scheduling an EV_START event to initiate device initialization, and + * waiting for completion of the initialization. + * + * Return value: + * 1 - success, 0 - error + */ int gigaset_start(struct cardstate *cs) { unsigned long flags; @@ -885,9 +937,15 @@ error: } EXPORT_SYMBOL_GPL(gigaset_start); -/* gigaset_shutdown - * check if a device is associated to the cardstate structure and stop it - * return value: 0 if ok, -1 if no device was associated +/** + * gigaset_shutdown() - shut down device operations + * @cs: device descriptor structure. + * + * Deactivates the device by scheduling an EV_SHUTDOWN event and + * waiting for completion of the shutdown. + * + * Return value: + * 0 - success, -1 - error (no device associated) */ int gigaset_shutdown(struct cardstate *cs) { @@ -918,6 +976,13 @@ exit: } EXPORT_SYMBOL_GPL(gigaset_shutdown); +/** + * gigaset_stop() - stop device operations + * @cs: device descriptor structure. + * + * Stops operations on the device by scheduling an EV_STOP event and + * waiting for completion of the shutdown. + */ void gigaset_stop(struct cardstate *cs) { mutex_lock(&cs->mutex); @@ -1026,6 +1091,14 @@ struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty) return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start); } +/** + * gigaset_freedriver() - free all associated ressources of a driver + * @drv: driver descriptor structure. + * + * Unregisters the driver from the system and deallocates the driver + * structure @drv and all structures referenced from it. + * All devices should be shut down before calling this. + */ void gigaset_freedriver(struct gigaset_driver *drv) { unsigned long flags; @@ -1041,14 +1114,16 @@ void gigaset_freedriver(struct gigaset_driver *drv) } EXPORT_SYMBOL_GPL(gigaset_freedriver); -/* gigaset_initdriver +/** + * gigaset_initdriver() - initialize driver structure + * @minor: First minor number + * @minors: Number of minors this driver can handle + * @procname: Name of the driver + * @devname: Name of the device files (prefix without minor number) + * * Allocate and initialize gigaset_driver structure. Initialize interface. - * parameters: - * minor First minor number - * minors Number of minors this driver can handle - * procname Name of the driver - * devname Name of the device files (prefix without minor number) - * return value: + * + * Return value: * Pointer to the gigaset_driver structure on success, NULL on failure. */ struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors, @@ -1101,6 +1176,13 @@ error: } EXPORT_SYMBOL_GPL(gigaset_initdriver); +/** + * gigaset_blockdriver() - block driver + * @drv: driver descriptor structure. + * + * Prevents the driver from attaching new devices, in preparation for + * deregistration. + */ void gigaset_blockdriver(struct gigaset_driver *drv) { drv->blocked = 1; diff --git a/drivers/isdn/gigaset/ev-layer.c b/drivers/isdn/gigaset/ev-layer.c index 926370a74981..cc768caa38f5 100644 --- a/drivers/isdn/gigaset/ev-layer.c +++ b/drivers/isdn/gigaset/ev-layer.c @@ -473,8 +473,13 @@ static int cid_of_response(char *s) //FIXME is ;+ at end of non-CID response really impossible? } -/* This function will be called via task queue from the callback handler. - * We received a modem response and have to handle it.. +/** + * gigaset_handle_modem_response() - process received modem response + * @cs: device descriptor structure. + * + * Called by asyncdata/isocdata if a block of data received from the + * device must be processed as a modem command response. The data is + * already in the cs structure. */ void gigaset_handle_modem_response(struct cardstate *cs) { diff --git a/drivers/isdn/gigaset/i4l.c b/drivers/isdn/gigaset/i4l.c index 322f16ebc6ec..654489d836cd 100644 --- a/drivers/isdn/gigaset/i4l.c +++ b/drivers/isdn/gigaset/i4l.c @@ -85,6 +85,14 @@ static int writebuf_from_LL(int driverID, int channel, int ack, return cs->ops->send_skb(bcs, skb); } +/** + * gigaset_skb_sent() - acknowledge sending an skb + * @bcs: B channel descriptor structure. + * @skb: sent data. + * + * Called by hardware module {bas,ser,usb}_gigaset when the data in a + * skb has been successfully sent, for signalling completion to the LL. + */ void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb) { unsigned len; @@ -461,6 +469,15 @@ int gigaset_isdn_setup_accept(struct at_state_t *at_state) return 0; } +/** + * gigaset_isdn_icall() - signal incoming call + * @at_state: connection state structure. + * + * Called by main module to notify the LL that an incoming call has been + * received. @at_state contains the parameters of the call. + * + * Return value: call disposition (ICALL_*) + */ int gigaset_isdn_icall(struct at_state_t *at_state) { struct cardstate *cs = at_state->cs; diff --git a/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c index f33ac27de643..6a8e1384e7bd 100644 --- a/drivers/isdn/gigaset/interface.c +++ b/drivers/isdn/gigaset/interface.c @@ -616,6 +616,15 @@ void gigaset_if_free(struct cardstate *cs) tty_unregister_device(drv->tty, cs->minor_index); } +/** + * gigaset_if_receive() - pass a received block of data to the tty device + * @cs: device descriptor structure. + * @buffer: received data. + * @len: number of bytes received. + * + * Called by asyncdata/isocdata if a block of data received from the + * device must be sent to userspace through the ttyG* device. + */ void gigaset_if_receive(struct cardstate *cs, unsigned char *buffer, size_t len) { diff --git a/drivers/isdn/gigaset/isocdata.c b/drivers/isdn/gigaset/isocdata.c index 7fd32f07fb47..9f3ef7b4248c 100644 --- a/drivers/isdn/gigaset/isocdata.c +++ b/drivers/isdn/gigaset/isocdata.c @@ -976,16 +976,17 @@ void gigaset_isoc_input(struct inbuf_t *inbuf) /* == data output ========================================================== */ -/* gigaset_send_skb - * called by common.c to queue an skb for sending - * and start transmission if necessary - * parameters: - * B Channel control structure - * skb - * return value: - * number of bytes accepted for sending - * (skb->len if ok, 0 if out of buffer space) - * or error code (< 0, eg. -EINVAL) +/** + * gigaset_isoc_send_skb() - queue an skb for sending + * @bcs: B channel descriptor structure. + * @skb: data to send. + * + * Called by i4l.c to queue an skb for sending, and start transmission if + * necessary. + * + * Return value: + * number of bytes accepted for sending (skb->len) if ok, + * error code < 0 (eg. -ENODEV) on error */ int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb) { -- cgit v1.2.3-58-ga151