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reset: bail if try_module_get() fails 

[ Upstream commit 4fb26fb83f0def3d39c14e268bcd4003aae8fade ]

Abort instead of returning a new reset control for a reset controller
device that is going to have its module unloaded.

Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Fixes: 61fc413176 ("reset: Add reset controller API")
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20210607082615.15160-1-p.zabel@pengutronix.de
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Philipp Zabel 2021-06-07 10:26:15 +02:00 committed by Greg Kroah-Hartman
parent 04bb5b3ea0
commit 8ef43fa464
1 changed files with 4 additions and 1 deletions
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5
drivers/reset/core.c
View File

@ -565,7 +565,10 @@ 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);