Use usb_get_dev() to increment the reference count of the usb device
structure in order to avoid releasing the structure while it is still in
use. And use usb_put_dev() to decrement the reference count and thus,
when it will be equal to 0 the structure will be released.
Reported-by: Salah Triki <salah.triki@xxxxxxxxx>
Signed-off-by: Cai Huoqing <caihuoqing@xxxxxxxxx>
---
drivers/media/usb/stkwebcam/stk-webcam.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/media/usb/stkwebcam/stk-webcam.c b/drivers/media/usb/stkwebcam/stk-webcam.c
index 0e231e576dc3..b54a23c6842e 100644
--- a/drivers/media/usb/stkwebcam/stk-webcam.c
+++ b/drivers/media/usb/stkwebcam/stk-webcam.c
@@ -1234,6 +1234,7 @@ static void stk_v4l_dev_release(struct video_device *vd)
if (dev->sio_bufs != NULL || dev->isobufs != NULL)
pr_err("We are leaking memory\n");
usb_put_intf(dev->interface);
+ usb_put_dev(dev->udev);
}
static const struct video_device stk_v4l_data = {
@@ -1309,7 +1310,7 @@ static int stk_camera_probe(struct usb_interface *interface,
init_waitqueue_head(&dev->wait_frame);
dev->first_init = 1; /* webcam LED management */
- dev->udev = udev;
+ dev->udev = usb_get_dev(udev);
dev->interface = interface;
usb_get_intf(interface);
--
2.25.1
