[PATCH] pinctrl: airoha: fix bias readback in airoha_pinconf_get()

[Vikrant Yadav]

In airoha_pinconf_get(), the last branch of bias check
"else if (pull_up || pull_down)", has no check on the requested
parameter. It was meant to reject PIN_CONFIG_BIAS_DISABLE when a pull
is enabled, but it also runs for PIN_CONFIG_BIAS_PULL_UP and
PIN_CONFIG_BIAS_PULL_DOWN. When the pin really has that pull set, the
earlier PULL_UP/PULL_DOWN checks do not reject it, so the execution
reaches this branch, which returns -EINVAL. Reading back a pull-up or
pull-down therefore always fails.

Signed-off-by: Vikrant Yadav <vikrantyadav4802@xxxxxxxxx>
---
 drivers/pinctrl/airoha/pinctrl-airoha.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/airoha/pinctrl-airoha.c b/drivers/pinctrl/airoha/pinctrl-airoha.c
index f505a3f69c5d..8cf4592cbc73 100644
--- a/drivers/pinctrl/airoha/pinctrl-airoha.c
+++ b/drivers/pinctrl/airoha/pinctrl-airoha.c
@@ -554,7 +554,7 @@ static int airoha_pinconf_get(struct pinctrl_dev *pctrl_dev,
 		else if (param == PIN_CONFIG_BIAS_PULL_DOWN &&
 			 !(pull_down && !pull_up))
 			return -EINVAL;
-		else if (pull_up || pull_down)
+		else if (param == PIN_CONFIG_BIAS_DISABLE && (pull_up || pull_down))
 			return -EINVAL;
 
 		arg = 1;
-- 
2.34.1