From 85a83560afa69862639fb2d6f670b4440a003335 Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Sun, 23 May 2010 01:02:08 +0000 Subject: isdn/capi: make reset_ctr op truly optional The CAPI controller operation reset_ctr is marked as optional, and not all drivers do implement it. Add a check to the kernel CAPI whether it exists before trying to call it. Signed-off-by: Tilman Schmidt Acked-by: Karsten Keil Signed-off-by: David S. Miller --- drivers/isdn/capi/kcapi.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/isdn') diff --git a/drivers/isdn/capi/kcapi.c b/drivers/isdn/capi/kcapi.c index bd00dceacaf0..bde3c88b8b27 100644 --- a/drivers/isdn/capi/kcapi.c +++ b/drivers/isdn/capi/kcapi.c @@ -1147,6 +1147,12 @@ load_unlock_out: if (ctr->state == CAPI_CTR_DETECTED) goto reset_unlock_out; + if (ctr->reset_ctr == NULL) { + printk(KERN_DEBUG "kcapi: reset: no reset function\n"); + retval = -ESRCH; + goto reset_unlock_out; + } + ctr->reset_ctr(ctr); retval = wait_on_ctr_state(ctr, CAPI_CTR_DETECTED); -- cgit v1.2.3 From e487639dc8ca6bd6c19a4140f45ebc88da56ddd5 Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Sun, 23 May 2010 01:02:38 +0000 Subject: isdn/gigaset: remove dummy CAPI method implementations Dummy implementations for the optional CAPI controller operations load_firmware and reset_ctr can cause userspace callers to hang indefinitely. It's better not to implement them at all. Signed-off-by: Tilman Schmidt Acked-by: Karsten Keil Signed-off-by: David S. Miller --- drivers/isdn/gigaset/capi.c | 28 ++-------------------------- 1 file changed, 2 insertions(+), 26 deletions(-) (limited to 'drivers/isdn') diff --git a/drivers/isdn/gigaset/capi.c b/drivers/isdn/gigaset/capi.c index 964a55fb1486..e72f86bccaa5 100644 --- a/drivers/isdn/gigaset/capi.c +++ b/drivers/isdn/gigaset/capi.c @@ -932,30 +932,6 @@ void gigaset_isdn_stop(struct cardstate *cs) * ============================ */ -/* - * load firmware - */ -static int gigaset_load_firmware(struct capi_ctr *ctr, capiloaddata *data) -{ - struct cardstate *cs = ctr->driverdata; - - /* AVM specific operation, not needed for Gigaset -- ignore */ - dev_notice(cs->dev, "load_firmware ignored\n"); - - return 0; -} - -/* - * reset (deactivate) controller - */ -static void gigaset_reset_ctr(struct capi_ctr *ctr) -{ - struct cardstate *cs = ctr->driverdata; - - /* AVM specific operation, not needed for Gigaset -- ignore */ - dev_notice(cs->dev, "reset_ctr ignored\n"); -} - /* * register CAPI application */ @@ -2213,8 +2189,8 @@ int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid) iif->ctr.driverdata = cs; strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name)); iif->ctr.driver_name = "gigaset"; - iif->ctr.load_firmware = gigaset_load_firmware; - iif->ctr.reset_ctr = gigaset_reset_ctr; + iif->ctr.load_firmware = NULL; + iif->ctr.reset_ctr = NULL; iif->ctr.register_appl = gigaset_register_appl; iif->ctr.release_appl = gigaset_release_appl; iif->ctr.send_message = gigaset_send_message; -- cgit v1.2.3