watchdog: rc32434_wdt: fix ioctl error handling

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[ Upstream commit 10e7ac22cd ]

Calling return copy_to_user(...) in an ioctl will not do the right thing
if there's a pagefault: copy_to_user returns the number of bytes not
copied in this case.

Fix up watchdog/rc32434_wdt to do
	return copy_to_user(...)) ?  -EFAULT : 0;

instead.

Cc: stable@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

...

This commit is contained in:

Michael S. Tsirkin 2016-02-28 17:44:09 +02:00 • committed by Sasha Levin

parent 463c16b5e6

commit 58d550f06d

1 changed files with 1 additions and 1 deletions

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drivers/watchdog/rc32434_wdt.c

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