pinctrl: rockchip: fix pinmux reset in rockchip_pmx_set

rockchip_pmx_set reset all pinmuxs in group to 0 in the case of error,
add missing bank data retrieval in that code to avoid setting mux on
unexpected pins.

Fixes: 1479718 ("pinctrl: rockchip: add return value to rockchip_set_mux")
Reviewed-by: Heiko Stuebner <[email protected]>
Signed-off-by: Huang-Huang Bao <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Linus Walleij <[email protected]>

Author: EHfive

drivers/pinctrl/pinctrl-rockchip.c

@@ -2751,8 +2751,10 @@ static int rockchip_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
 
 	if (ret) {
 		/* revert the already done pin settings */
-		for (cnt--; cnt >= 0; cnt--)
+		for (cnt--; cnt >= 0; cnt--) {
+			bank = pin_to_bank(info, pins[cnt]);
 			rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
+		}
 
 		return ret;
 	}