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reset: bail if try_module_get() fails

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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>
This commit is contained in:
Philipp Zabel
2021-06-07 10:26:15 +02:00
parent 91105ed604
commit 4fb26fb83f
1 changed files with 4 additions and 1 deletions
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5
drivers/reset/core.c
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@@ -774,7 +774,10 @@ __reset_control_get_internal(struct reset_controller_dev *rcdev,
if (!rstc) if (!rstc)
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);
try_module_get(rcdev->owner); if (!try_module_get(rcdev->owner)) {
kfree(rstc);
return ERR_PTR(-ENODEV);
}
rstc->rcdev = rcdev; rstc->rcdev = rcdev;
list_add(&rstc->list, &rcdev->reset_control_head); list_add(&rstc->list, &rcdev->reset_control_head);