[PATCH 4.19 077/421] HID: do not use down_interruptible() when unbinding devices

Greg Kroah-Hartman
2021-07-19T16:08:52Z

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>

[ 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>
---
drivers/hid/hid-core.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index acbbc21e6233..4549fbb74156 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,
--
2.30.2