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pinctrl: core: Remove extra kref_get which blocks hogs being freed 

commit aafd56fc79 upstream.

kref_init starts with the reference count at 1, which will be balanced
by the pinctrl_put in pinctrl_unregister. The additional kref_get in
pinctrl_claim_hogs will increase this count to 2 and cause the hogs to
not get freed when pinctrl_unregister is called.

Fixes: 6118714275 ("pinctrl: core: Fix pinctrl_register_and_init() with pinctrl_enable()")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200228154142.13860-1-ckeepax@opensource.cirrus.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Charles Keepax 2020-02-28 15:41:42 +00:00 committed by Greg Kroah-Hartman
parent d2df67d741
commit f5ace0987a
1 changed files with 0 additions and 1 deletions
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drivers/pinctrl/core.c
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@ -2025,7 +2025,6 @@ static int pinctrl_claim_hogs(struct pinctrl_dev *pctldev)
return PTR_ERR(pctldev->p);
}
kref_get(&pctldev->p->users);
pctldev->hog_default =
pinctrl_lookup_state(pctldev->p, PINCTRL_STATE_DEFAULT);
if (IS_ERR(pctldev->hog_default)) {