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HID: u2fzero: properly handle timeouts in usb_submit_urb

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[ Upstream commit 43775e62c4 ]

The wait_for_completion_timeout function returns 0 if timed out or a
positive value if completed. Hence, "less than zero" comparison always
misses timeouts and doesn't kill the URB as it should, leading to
re-sending it while it is active.

Fixes: 42337b9d4d ("HID: add driver for U2F Zero built-in LED and RNG")
Signed-off-by: Andrej Shadura <andrew.shadura@collabora.co.uk>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Andrej Shadura
2021-10-19 17:29:17 +02:00
committed by Greg Kroah-Hartman
parent e2f0bff411
commit 4310970d0b
1 changed files with 1 additions and 1 deletions
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2
drivers/hid/hid-u2fzero.c
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@@ -132,7 +132,7 @@ static int u2fzero_recv(struct u2fzero_device *dev,
ret = (wait_for_completion_timeout(
&ctx.done, msecs_to_jiffies(USB_CTRL_SET_TIMEOUT)));
if (ret < 0) {
if (ret == 0) {
usb_kill_urb(dev->urb);
hid_err(hdev, "urb submission timed out");
} else {