From a5ef91c9a55c89e8c57e628d371107cdfe2d0bd9 Mon Sep 17 00:00:00 2001 From: Dean Anderson Date: Thu, 8 Apr 2010 23:46:08 -0300 Subject: [PATCH] V4L/DVB: s2255drv: removal of big kernel lock big kernel lock removed from open function. v4l2 code does not require locking the open function except to check asynchronous firmware load state, which is protected by a mutex Signed-off-by: Dean Anderson Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/s2255drv.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) diff --git a/drivers/media/video/s2255drv.c b/drivers/media/video/s2255drv.c index 4c5d367..83ee93d 100644 --- a/drivers/media/video/s2255drv.c +++ b/drivers/media/video/s2255drv.c @@ -1753,7 +1753,6 @@ static int s2255_open(struct file *file) int state; dprintk(1, "s2255: open called (dev=%s)\n", video_device_node_name(vdev)); - lock_kernel(); for (i = 0; i < MAX_CHANNELS; i++) if (&dev->vdev[i] == vdev) { cur_channel = i; @@ -1769,7 +1768,6 @@ static int s2255_open(struct file *file) switch (state) { case S2255_FW_DISCONNECTING: mutex_unlock(&dev->open_lock); - unlock_kernel(); return -ENODEV; case S2255_FW_FAILED: s2255_dev_err(&dev->udev->dev, @@ -1809,30 +1807,24 @@ static int s2255_open(struct file *file) break; case S2255_FW_FAILED: printk(KERN_INFO "2255 firmware load failed.\n"); - unlock_kernel(); return -ENODEV; case S2255_FW_DISCONNECTING: printk(KERN_INFO "%s: disconnecting\n", __func__); - unlock_kernel(); return -ENODEV; case S2255_FW_LOADED_DSPWAIT: case S2255_FW_NOTLOADED: printk(KERN_INFO "%s: firmware not loaded yet" "please try again later\n", __func__); - unlock_kernel(); return -EAGAIN; default: printk(KERN_INFO "%s: unknown state\n", __func__); - unlock_kernel(); return -EFAULT; } /* allocate + initialize per filehandle data */ fh = kzalloc(sizeof(*fh), GFP_KERNEL); - if (NULL == fh) { - unlock_kernel(); + if (NULL == fh) return -ENOMEM; - } file->private_data = fh; fh->dev = dev; fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; @@ -1860,7 +1852,6 @@ static int s2255_open(struct file *file) fh->type, V4L2_FIELD_INTERLACED, sizeof(struct s2255_buffer), fh); - unlock_kernel(); return 0; } -- 2.7.4