diff options
| author | Kees Cook <keescook@chromium.org> | 2017-10-20 13:47:08 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-23 01:30:11 +0100 |
| commit | 33ad61d0f799656e8987e9c80e6e15151bb857f3 (patch) | |
| tree | 5987395998bae1ba966523f9d728ff0c5c29cbc9 /drivers/isdn | |
| parent | e27afb84b4680570b64c958dfcba9e0b3da92fc9 (diff) | |
isdn/gigaset: Provide cardstate context for bas timer callbacks
While the work callback uses the urb to find cardstate from bas_cardstate,
this may not be valid for timer callbacks. Instead, introduce a direct
pointer back to the cardstate from bas_cardstate for use in timer
callbacks.
Reported-by: Paul Bolle <pebolle@tiscali.nl>
Fixes: 4cfea08e6251 ("isdn/gigaset: Convert timers to use timer_setup()")
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Johan Hovold <johan@kernel.org>
Cc: gigaset307x-common@lists.sourceforge.net
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/isdn')
| -rw-r--r-- | drivers/isdn/gigaset/bas-gigaset.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c index c990c6bbffc2..20d0a080a2b0 100644 --- a/drivers/isdn/gigaset/bas-gigaset.c +++ b/drivers/isdn/gigaset/bas-gigaset.c @@ -89,6 +89,7 @@ static int start_cbsend(struct cardstate *); struct bas_cardstate { struct usb_device *udev; /* USB device pointer */ + struct cardstate *cs; struct usb_interface *interface; /* interface for this device */ unsigned char minor; /* starting minor number */ @@ -436,8 +437,7 @@ static void check_pending(struct bas_cardstate *ucs) static void cmd_in_timeout(struct timer_list *t) { struct bas_cardstate *ucs = from_timer(ucs, t, timer_cmd_in); - struct urb *urb = ucs->urb_int_in; - struct cardstate *cs = urb->context; + struct cardstate *cs = ucs->cs; int rc; if (!ucs->rcvbuf_size) { @@ -643,8 +643,7 @@ static void int_in_work(struct work_struct *work) static void int_in_resubmit(struct timer_list *t) { struct bas_cardstate *ucs = from_timer(ucs, t, timer_int_in); - struct urb *urb = ucs->urb_int_in; - struct cardstate *cs = urb->context; + struct cardstate *cs = ucs->cs; int rc; if (ucs->retry_int_in++ >= BAS_RETRY) { @@ -1446,8 +1445,7 @@ error: static void req_timeout(struct timer_list *t) { struct bas_cardstate *ucs = from_timer(ucs, t, timer_ctrl); - struct urb *urb = ucs->urb_int_in; - struct cardstate *cs = urb->context; + struct cardstate *cs = ucs->cs; int pending; unsigned long flags; @@ -1843,8 +1841,7 @@ static void write_command_callback(struct urb *urb) static void atrdy_timeout(struct timer_list *t) { struct bas_cardstate *ucs = from_timer(ucs, t, timer_atrdy); - struct urb *urb = ucs->urb_int_in; - struct cardstate *cs = urb->context; + struct cardstate *cs = ucs->cs; dev_warn(cs->dev, "timeout waiting for HD_READY_SEND_ATDATA\n"); @@ -2217,6 +2214,7 @@ static int gigaset_initcshw(struct cardstate *cs) } spin_lock_init(&ucs->lock); + ucs->cs = cs; timer_setup(&ucs->timer_ctrl, req_timeout, 0); timer_setup(&ucs->timer_atrdy, atrdy_timeout, 0); timer_setup(&ucs->timer_cmd_in, cmd_in_timeout, 0); |