From d56dc61265d2527a63ab5b0f03199a43cd89ca36 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Wed, 30 Jul 2008 08:43:36 -0300 Subject: V4L/DVB (8613): v4l: move BKL down to the driver level. The BKL is now moved from the video_open function in v4l2-dev.c to the various drivers. It seems about a third of the drivers already has a lock of some sort protecting the open(), another third uses video_exclusive_open (yuck!) and the last third required adding the BKL in their open function. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx88/cx88-blackbird.c | 8 +++++++- drivers/media/video/cx88/cx88-video.c | 10 ++++++++-- 2 files changed, 15 insertions(+), 3 deletions(-) (limited to 'drivers/media/video/cx88') diff --git a/drivers/media/video/cx88/cx88-blackbird.c b/drivers/media/video/cx88/cx88-blackbird.c index 9a1374a38ec..1b7e2e44b80 100644 --- a/drivers/media/video/cx88/cx88-blackbird.c +++ b/drivers/media/video/cx88/cx88-blackbird.c @@ -1057,12 +1057,15 @@ static int mpeg_open(struct inode *inode, struct file *file) struct cx8802_driver *drv = NULL; int err; + lock_kernel(); dev = cx8802_get_device(inode); dprintk( 1, "%s\n", __func__); - if (dev == NULL) + if (dev == NULL) { + unlock_kernel(); return -ENODEV; + } /* Make sure we can acquire the hardware */ drv = cx8802_get_driver(dev, CX88_MPEG_BLACKBIRD); @@ -1077,6 +1080,7 @@ static int mpeg_open(struct inode *inode, struct file *file) if (blackbird_initialize_codec(dev) < 0) { if (drv) drv->request_release(drv); + unlock_kernel(); return -EINVAL; } dprintk(1,"open minor=%d\n",minor); @@ -1086,6 +1090,7 @@ static int mpeg_open(struct inode *inode, struct file *file) if (NULL == fh) { if (drv) drv->request_release(drv); + unlock_kernel(); return -ENOMEM; } file->private_data = fh; @@ -1101,6 +1106,7 @@ static int mpeg_open(struct inode *inode, struct file *file) /* FIXME: locking against other video device */ cx88_set_scale(dev->core, dev->width, dev->height, fh->mpegq.field); + unlock_kernel(); return 0; } diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c index ef4d56ea002..61e03d4703f 100644 --- a/drivers/media/video/cx88/cx88-video.c +++ b/drivers/media/video/cx88/cx88-video.c @@ -773,6 +773,7 @@ static int video_open(struct inode *inode, struct file *file) enum v4l2_buf_type type = 0; int radio = 0; + lock_kernel(); list_for_each_entry(h, &cx8800_devlist, devlist) { if (h->video_dev->minor == minor) { dev = h; @@ -788,8 +789,10 @@ static int video_open(struct inode *inode, struct file *file) dev = h; } } - if (NULL == dev) + if (NULL == dev) { + unlock_kernel(); return -ENODEV; + } core = dev->core; @@ -798,8 +801,10 @@ static int video_open(struct inode *inode, struct file *file) /* allocate + initialize per filehandle data */ fh = kzalloc(sizeof(*fh),GFP_KERNEL); - if (NULL == fh) + if (NULL == fh) { + unlock_kernel(); return -ENOMEM; + } file->private_data = fh; fh->dev = dev; fh->radio = radio; @@ -832,6 +837,7 @@ static int video_open(struct inode *inode, struct file *file) cx88_set_stereo(core,V4L2_TUNER_MODE_STEREO,1); cx88_call_i2c_clients(core,AUDC_SET_RADIO,NULL); } + unlock_kernel(); return 0; } -- cgit v1.2.3