V4L/DVB (9194): stk-webcam: fix crash on close after disconnect
This patch prevents stk-webcam from updating usb device information
once the camera has been removed. This prevents a crash that would
otherwise occur if the camera is disconnected while it is still in
use.
Signed-off-by: David Ellingsworth <david@identd.dyndns.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/stk-webcam.c b/drivers/media/video/stk-webcam.c
index f1d5b3e..edaea49 100644
--- a/drivers/media/video/stk-webcam.c
+++ b/drivers/media/video/stk-webcam.c
@@ -559,7 +559,7 @@
urb = dev->isobufs[i].urb;
if (urb) {
- if (atomic_read(&dev->urbs_used))
+ if (atomic_read(&dev->urbs_used) && is_present(dev))
usb_kill_urb(urb);
usb_free_urb(urb);
}
@@ -688,18 +688,14 @@
{
struct stk_camera *dev = fp->private_data;
- if (dev->owner != fp) {
- usb_autopm_put_interface(dev->interface);
- return 0;
+ if (dev->owner == fp) {
+ stk_stop_stream(dev);
+ stk_free_buffers(dev);
+ dev->owner = NULL;
}
- stk_stop_stream(dev);
-
- stk_free_buffers(dev);
-
- dev->owner = NULL;
-
- usb_autopm_put_interface(dev->interface);
+ if(is_present(dev))
+ usb_autopm_put_interface(dev->interface);
return 0;
}
