From 5dd791e743207ae2cfc2711a7a2e882a307b9f5a Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Thu, 1 Jan 2009 02:35:24 +0000 Subject: add DVB_DEVICE_TYPE= to uevent From: Kay Sievers Signed-off-by: Kay Sievers Signed-off-by: Mauro Carvalho Chehab --- linux/drivers/media/dvb/dvb-core/dvbdev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'linux/drivers/media/dvb/dvb-core') diff --git a/linux/drivers/media/dvb/dvb-core/dvbdev.c b/linux/drivers/media/dvb/dvb-core/dvbdev.c index fa1adf9dd..4267b2b87 100644 --- a/linux/drivers/media/dvb/dvb-core/dvbdev.c +++ b/linux/drivers/media/dvb/dvb-core/dvbdev.c @@ -456,8 +456,9 @@ static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env) { struct dvb_device *dvbdev = dev_get_drvdata(dev); - add_uevent_var(env, "DVB_DEVICE_NUM=%d", dvbdev->id); add_uevent_var(env, "DVB_ADAPTER_NUM=%d", dvbdev->adapter->num); + add_uevent_var(env, "DVB_DEVICE_TYPE=%s", dnames[dvbdev->type]); + add_uevent_var(env, "DVB_DEVICE_NUM=%d", dvbdev->id); return 0; } #endif -- cgit v1.2.3 From d501f9bc006435bddc6c5a93b717f12ef47584a9 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Mon, 5 Jan 2009 02:19:06 -0200 Subject: dvb_frontend: Fix some sparse warnings due to static symbols From: Mauro Carvalho Chehab /home/v4l/master/v4l/dvb_frontend.c:838:19: warning: symbol 'dtv_cmds' was not declared. Should it be static? /home/v4l/master/v4l/dvb_frontend.c:1035:6: warning: symbol 'dtv_property_dump' was not declared. Should it be static? /home/v4l/master/v4l/dvb_frontend.c:1066:5: warning: symbol 'is_legacy_delivery_system' was not declared. Should it be static? /home/v4l/master/v4l/dvb_frontend.c:1080:6: warning: symbol 'dtv_property_cache_sync' was not declared. Should it be static? /home/v4l/master/v4l/dvb_frontend.c:1132:6: warning: symbol 'dtv_property_legacy_params_sync' was not declared. Should it be static? /home/v4l/master/v4l/dvb_frontend.c:1187:6: warning: symbol 'dtv_property_adv_params_sync' was not declared. Should it be static? /home/v4l/master/v4l/dvb_frontend.c:1222:6: warning: symbol 'dtv_property_cache_submit' was not declared. Should it be static? /home/v4l/master/v4l/dvb_frontend.c:1253:5: warning: symbol 'dtv_property_process_get' was not declared. Should it be static? /home/v4l/master/v4l/dvb_frontend.c:1362:5: warning: symbol 'dtv_property_process_set' was not declared. Should it be static? Priority: normal Signed-off-by: Mauro Carvalho Chehab --- linux/drivers/media/dvb/dvb-core/dvb_frontend.c | 26 ++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) (limited to 'linux/drivers/media/dvb/dvb-core') diff --git a/linux/drivers/media/dvb/dvb-core/dvb_frontend.c b/linux/drivers/media/dvb/dvb-core/dvb_frontend.c index d1a9e587c..01a9ceb37 100644 --- a/linux/drivers/media/dvb/dvb-core/dvb_frontend.c +++ b/linux/drivers/media/dvb/dvb-core/dvb_frontend.c @@ -835,7 +835,7 @@ static int dvb_frontend_check_parameters(struct dvb_frontend *fe, return 0; } -struct dtv_cmds_h dtv_cmds[] = { +static struct dtv_cmds_h dtv_cmds[] = { [DTV_TUNE] = { .name = "DTV_TUNE", .cmd = DTV_TUNE, @@ -1032,7 +1032,7 @@ struct dtv_cmds_h dtv_cmds[] = { }, }; -void dtv_property_dump(struct dtv_property *tvp) +static void dtv_property_dump(struct dtv_property *tvp) { int i; @@ -1063,7 +1063,7 @@ void dtv_property_dump(struct dtv_property *tvp) dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data); } -int is_legacy_delivery_system(fe_delivery_system_t s) +static int is_legacy_delivery_system(fe_delivery_system_t s) { if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) || (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) || @@ -1077,7 +1077,8 @@ int is_legacy_delivery_system(fe_delivery_system_t s) * drivers can use a single set_frontend tuning function, regardless of whether * it's being used for the legacy or new API, reducing code and complexity. */ -void dtv_property_cache_sync(struct dvb_frontend *fe, struct dvb_frontend_parameters *p) +static void dtv_property_cache_sync(struct dvb_frontend *fe, + struct dvb_frontend_parameters *p) { struct dtv_frontend_properties *c = &fe->dtv_property_cache; @@ -1129,7 +1130,7 @@ void dtv_property_cache_sync(struct dvb_frontend *fe, struct dvb_frontend_parame /* Ensure the cached values are set correctly in the frontend * legacy tuning structures, for the advanced tuning API. */ -void dtv_property_legacy_params_sync(struct dvb_frontend *fe) +static void dtv_property_legacy_params_sync(struct dvb_frontend *fe) { struct dtv_frontend_properties *c = &fe->dtv_property_cache; struct dvb_frontend_private *fepriv = fe->frontend_priv; @@ -1184,7 +1185,7 @@ void dtv_property_legacy_params_sync(struct dvb_frontend *fe) /* Ensure the cached values are set correctly in the frontend * legacy tuning structures, for the legacy tuning API. */ -void dtv_property_adv_params_sync(struct dvb_frontend *fe) +static void dtv_property_adv_params_sync(struct dvb_frontend *fe) { struct dtv_frontend_properties *c = &fe->dtv_property_cache; struct dvb_frontend_private *fepriv = fe->frontend_priv; @@ -1219,7 +1220,7 @@ void dtv_property_adv_params_sync(struct dvb_frontend *fe) } } -void dtv_property_cache_submit(struct dvb_frontend *fe) +static void dtv_property_cache_submit(struct dvb_frontend *fe) { struct dtv_frontend_properties *c = &fe->dtv_property_cache; @@ -1250,8 +1251,9 @@ static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file, static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file, unsigned int cmd, void *parg); -int dtv_property_process_get(struct dvb_frontend *fe, struct dtv_property *tvp, - struct inode *inode, struct file *file) +static int dtv_property_process_get(struct dvb_frontend *fe, + struct dtv_property *tvp, + struct inode *inode, struct file *file) { int r = 0; @@ -1359,8 +1361,10 @@ int dtv_property_process_get(struct dvb_frontend *fe, struct dtv_property *tvp, return r; } -int dtv_property_process_set(struct dvb_frontend *fe, struct dtv_property *tvp, - struct inode *inode, struct file *file) +static int dtv_property_process_set(struct dvb_frontend *fe, + struct dtv_property *tvp, + struct inode *inode, + struct file *file) { int r = 0; struct dvb_frontend_private *fepriv = fe->frontend_priv; -- cgit v1.2.3 From fb1a0811d58fdbf564fa22b7fb268969c40af175 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Thu, 8 Jan 2009 23:28:09 -0200 Subject: backport changeset f41ced8f108cc80f16509b907cd7ac93944459bc From: Mauro Carvalho Chehab Author: Laurent Pinchart Check fops_get() return value Several subsystem open handlers dereference the fops_get() return value without checking it for nullness. This opens a race condition between the open handler and module unloading. A module can be marked as being unloaded (MODULE_STATE_GOING) before its exit function is called and gets the chance to unregister the driver. During that window open handlers can still be called, and fops_get() will fail in try_module_get() and return a NULL pointer. This change checks the fops_get() return value and returns -ENODEV if NULL. kernel-sync: Signed-off-by: Mauro Carvalho Chehab --- linux/drivers/media/dvb/dvb-core/dvbdev.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'linux/drivers/media/dvb/dvb-core') diff --git a/linux/drivers/media/dvb/dvb-core/dvbdev.c b/linux/drivers/media/dvb/dvb-core/dvbdev.c index 4267b2b87..940114768 100644 --- a/linux/drivers/media/dvb/dvb-core/dvbdev.c +++ b/linux/drivers/media/dvb/dvb-core/dvbdev.c @@ -84,6 +84,10 @@ static int dvb_device_open(struct inode *inode, struct file *file) file->private_data = dvbdev; old_fops = file->f_op; file->f_op = fops_get(dvbdev->fops); + if (file->f_op == NULL) { + file->f_op = old_fops; + goto fail; + } if(file->f_op->open) err = file->f_op->open(inode,file); if (err) { @@ -95,6 +99,7 @@ static int dvb_device_open(struct inode *inode, struct file *file) unlock_kernel(); return err; } +fail: up_read(&minor_rwsem); unlock_kernel(); return -ENODEV; -- cgit v1.2.3