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[media] em28xx-v4l: simplify em28xx_v4l2_open() by using v4l2_fh_open()

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Instead of calling

...
struct v4l2_fh *fh = kzalloc(sizeof(*fh), GFP_KERNEL);
filp->private_data = fh;
v4l2_fh_init(fh, vdev);
v4l2_fh_add(fh);
...

simply use function v4l2_fh_open() which does all of these calls for us.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Frank Schaefer 2014-07-25 14:48:57 -03:00 committed by Mauro Carvalho Chehab
parent 917ba6b0b6
commit 3c0f90e14c
1 changed files with 7 additions and 8 deletions
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15
drivers/media/usb/em28xx/em28xx-video.c
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@ -1868,7 +1868,7 @@ static int em28xx_v4l2_open(struct file *filp)
struct em28xx *dev = video_drvdata(filp);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
enum v4l2_buf_type fh_type = 0;
struct v4l2_fh *fh;
int ret;
switch (vdev->vfl_type) {
case VFL_TYPE_GRABBER:
@ -1889,14 +1889,14 @@ static int em28xx_v4l2_open(struct file *filp)
if (mutex_lock_interruptible(&dev->lock))
return -ERESTARTSYS;
fh = kzalloc(sizeof(struct v4l2_fh), GFP_KERNEL);
if (!fh) {
em28xx_errdev("em28xx-video.c: Out of memory?!\n");
ret = v4l2_fh_open(filp);
if (ret) {
em28xx_errdev("%s: v4l2_fh_open() returned error %d\n",
__func__, ret);
mutex_unlock(&dev->lock);
return -ENOMEM;
return ret;
}
v4l2_fh_init(fh, vdev);
filp->private_data = fh;
if (v4l2->users == 0) {
em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
@ -1921,7 +1921,6 @@ static int em28xx_v4l2_open(struct file *filp)
v4l2->users++;
mutex_unlock(&dev->lock);
v4l2_fh_add(fh);
return 0;
}