diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2010-10-27 09:30:32 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-11-08 22:35:57 -0200 |
| commit | 0edf2e5e2bd0ae7689ce8a57ae3c87cc1f0c6548 (patch) | |
| tree | 3a7cfbea0c456f44b79db2985d8e6e7085fa4152 /drivers/media/video/se401.c | |
| parent | 2c2742da1e590f426e8d85ce4e33b69142245fb8 (diff) | |
[media] v4l: kill the BKL
All of the hard problems for BKL removal appear to be solved in the
v4l-dvb/master tree. This removes the BKL from the various open
functions that do not need it, or only use it to protect an
open count.
The zoran driver is nontrivial in this regard, so I introduce
a new mutex that locks both the open/release and the ioctl
functions. Someone with access to the hardware can probably
improve that by using the existing lock in all cases.
Finally, all drivers that still use the locked version of the
ioctl function now get called under a new mutex instead of
the BKL.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/se401.c')
| -rw-r--r-- | drivers/media/video/se401.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/media/video/se401.c b/drivers/media/video/se401.c index 41d0166c0f9..41360d7c3e9 100644 --- a/drivers/media/video/se401.c +++ b/drivers/media/video/se401.c @@ -31,7 +31,6 @@ static const char version[] = "0.24"; #include <linux/init.h> #include <linux/vmalloc.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #include <linux/pagemap.h> #include <linux/usb.h> #include "se401.h" @@ -951,9 +950,9 @@ static int se401_open(struct file *file) struct usb_se401 *se401 = (struct usb_se401 *)dev; int err = 0; - lock_kernel(); + mutex_lock(&se401->lock); if (se401->user) { - unlock_kernel(); + mutex_unlock(&se401->lock); return -EBUSY; } se401->fbuf = rvmalloc(se401->maxframesize * SE401_NUMFRAMES); @@ -962,7 +961,7 @@ static int se401_open(struct file *file) else err = -ENOMEM; se401->user = !err; - unlock_kernel(); + mutex_unlock(&se401->lock); return err; } |