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path: root/drivers/usb/misc/appledisplay.c
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Diffstat (limited to 'drivers/usb/misc/appledisplay.c')
-rw-r--r--drivers/usb/misc/appledisplay.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/usb/misc/appledisplay.c b/drivers/usb/misc/appledisplay.c
index ac92725458b5..ba1eaabc7796 100644
--- a/drivers/usb/misc/appledisplay.c
+++ b/drivers/usb/misc/appledisplay.c
@@ -164,7 +164,12 @@ static int appledisplay_bl_get_brightness(struct backlight_device *bd)
0,
pdata->msgdata, 2,
ACD_USB_TIMEOUT);
- brightness = pdata->msgdata[1];
+ if (retval < 2) {
+ if (retval >= 0)
+ retval = -EMSGSIZE;
+ } else {
+ brightness = pdata->msgdata[1];
+ }
mutex_unlock(&pdata->sysfslock);
if (retval < 0)
@@ -299,6 +304,7 @@ error:
if (pdata) {
if (pdata->urb) {
usb_kill_urb(pdata->urb);
+ cancel_delayed_work_sync(&pdata->work);
if (pdata->urbdata)
usb_free_coherent(pdata->udev, ACD_URB_BUFFER_LEN,
pdata->urbdata, pdata->urb->transfer_dma);