From: Marcel Holtmann <marcel@holtmann.org>
Date: Wed, 4 Dec 2019 02:43:55 +0000 (+0100)
Subject: HID: uhid: Fix returning EPOLLOUT from uhid_char_poll
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=be54e7461ffdc5809b67d2aeefc1ddc9a91470c7;p=linux.git

HID: uhid: Fix returning EPOLLOUT from uhid_char_poll

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

Fixes: 1f9dec1e0164 ("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>
---

diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index fa0cc08998273..935c3d0a3b636 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -772,7 +772,7 @@ static __poll_t uhid_char_poll(struct file *file, poll_table *wait)
 	if (uhid->head != uhid->tail)
 		return EPOLLIN | EPOLLRDNORM;
 
-	return 0;
+	return EPOLLOUT | EPOLLWRNORM;
 }
 
 static const struct file_operations uhid_fops = {