From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Sat, 20 Mar 2021 00:27:16 +0000 (-0700)
Subject: HID: do not use down_interruptible() when unbinding devices
X-Git-Tag: v4.19.198~344
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eb38cd3037d00267297f3f5635dd19dc54353ad1;p=thirdparty%2Fkernel%2Fstable.git

HID: do not use down_interruptible() when unbinding devices

[ Upstream commit f2145f8dc566c4f3b5a8deb58dcd12bed4e20194 ]

Action of unbinding driver from a device is not cancellable and should not
fail, and driver core does not pay attention to the result of "remove"
method, therefore using down_interruptible() in hid_device_remove() does
not make sense.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index acbbc21e62338..4549fbb741563 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -2124,12 +2124,8 @@ static int hid_device_remove(struct device *dev)
 {
 	struct hid_device *hdev = to_hid_device(dev);
 	struct hid_driver *hdrv;
-	int ret = 0;
 
-	if (down_interruptible(&hdev->driver_input_lock)) {
-		ret = -EINTR;
-		goto end;
-	}
+	down(&hdev->driver_input_lock);
 	hdev->io_started = false;
 
 	hdrv = hdev->driver;
@@ -2144,8 +2140,8 @@ static int hid_device_remove(struct device *dev)
 
 	if (!hdev->io_started)
 		up(&hdev->driver_input_lock);
-end:
-	return ret;
+
+	return 0;
 }
 
 static ssize_t modalias_show(struct device *dev, struct device_attribute *a,