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

commit aafd56fc79041bf36f97712d4b35208cbe07db90 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: 6118714275f0 ("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>

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 2bbd8ee..6381745 100644 (file)
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -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)) {