reset: bail if try_module_get() fails

stable inclusion
from stable-5.10.52
commit 884d09d1f18ca9a8c21ce3b7fe228d6ee858a6c7
bugzilla: 175542 https://gitee.com/openeuler/kernel/issues/I4DTKU

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=884d09d1f18ca9a8c21ce3b7fe228d6ee858a6c7

--------------------------------

[ Upstream commit 4fb26fb8 ]

Abort instead of returning a new reset control for a reset controller
device that is going to have its module unloaded.
Reported-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Fixes: 61fc4131 ("reset: Add reset controller API")
Acked-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20210607082615.15160-1-p.zabel@pengutronix.deSigned-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/reset/core.c

@@ -567,7 +567,10 @@ static struct reset_control *__reset_control_get_internal(
 	if (!rstc)
 		return ERR_PTR(-ENOMEM);
 
-	try_module_get(rcdev->owner);
+	if (!try_module_get(rcdev->owner)) {
+		kfree(rstc);
+		return ERR_PTR(-ENODEV);
+	}
 
 	rstc->rcdev = rcdev;
 	list_add(&rstc->list, &rcdev->reset_control_head);