linux-kernel - [PATCH 4/6] pinctrl: rockchip: do not set gpio if bank invalid

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Date:   Mon, 31 Aug 2020 16:47:51 +0800
From:   Jianqun Xu <jay.xu@...k-chips.com>
To:     linus.walleij@...aro.org, heiko@...ech.de
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-rockchip@...ts.infradead.org,
        Jianqun Xu <jay.xu@...k-chips.com>
Subject: [PATCH 4/6] pinctrl: rockchip: do not set gpio if bank invalid

Add valid check for gpio bank.

Change-Id: Ib03e2910a7316bd61df18236151e371c4d04077a
Signed-off-by: Jianqun Xu <jay.xu@...k-chips.com>
---
 drivers/pinctrl/pinctrl-rockchip.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 265d64b8c4f5..6080573155f6 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -2687,6 +2687,9 @@ static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 				return rc;
 			break;
 		case PIN_CONFIG_OUTPUT:
+			if (!bank->valid)
+				return -ENOTSUPP;
+
 			rockchip_gpio_set(&bank->gpio_chip,
 					  pin - bank->pin_base, arg);
 			rc = _rockchip_pmx_gpio_set_direction(&bank->gpio_chip,
@@ -2752,6 +2755,9 @@ static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
 		arg = 1;
 		break;
 	case PIN_CONFIG_OUTPUT:
+		if (!bank->valid)
+			return -ENOTSUPP;
+
 		rc = rockchip_get_mux(bank, pin - bank->pin_base);
 		if (rc != RK_FUNC_GPIO)
 			return -EINVAL;
-- 
2.17.1