Commit 2d21f37e authored Dec 04, 2019 by Marcel Holtmann Committed by Greg Kroah-Hartman Jan 14, 2020

HID: uhid: Fix returning EPOLLOUT from uhid_char_poll



commit be54e7461ffdc5809b67d2aeefc1ddc9a91470c7 upstream.

Always return EPOLLOUT from uhid_char_poll to allow polling /dev/uhid
for writable state.

Fixes: 1f9dec1e ("HID: uhid: allow poll()'ing on uhid devices")
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: stable@vger.kernel.org
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 31d06cc8

drivers/hid/uhid.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -775,7 +775,7 @@ static __poll_t uhid_char_poll(struct file file, poll_table wait)
	if (uhid->head != uhid->tail)		if (uhid->head != uhid->tail)
	return EPOLLIN \| EPOLLRDNORM;		return EPOLLIN \| EPOLLRDNORM;

	return 0;		return EPOLLOUT \| EPOLLWRNORM;
	}		}

	static const struct file_operations uhid_fops = {		static const struct file_operations uhid_fops = {