When a device was disconnected the driver may hang at waiting for urbs it never
will get. Fix this by using a timeout while waiting for the used semaphore.
There is still a memory leak if a timeout happens, but at least the driver
now continues his disconnect routine.
Cc: <sta...@vger.kernel.org>
Signed-off-by: Alexander Holler <hol...@ahsoftware.de>
---
drivers/video/udlfb.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/video/udlfb.c b/drivers/video/udlfb.c
index 86d449e..db6cc66 100644
--- a/drivers/video/udlfb.c
+++ b/drivers/video/udlfb.c
@@ -1832,8 +1832,9 @@ static void dlfb_free_urb_list(struct dlfb_data *dev)
/* keep waiting and freeing, until we've got 'em all */
while (count--) {
- /* Getting interrupted means a leak, but ok at disconnect */
- ret = down_interruptible(&dev->urbs.limit_sem);
+ /* Timeout likely occurs at disconnect (resulting in a leak) */
+ ret = down_timeout_killable(&dev->urbs.limit_sem,
+ FREE_URB_TIMEOUT);
if (ret)
break;
--
1.7.11.7
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