linux-kernel - [PATCH] pinctl: ti: iodelay: fix error checking on pinctrl_count_index_with

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Message-Id: <20190920122030.14340-1-colin.king@canonical.com>
Date:   Fri, 20 Sep 2019 14:20:30 +0200
From:   Colin King <colin.king@...onical.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Tony Lindgren <tony@...mide.com>,
        YueHaibing <yuehaibing@...wei.com>, Nishanth Menon <nm@...com>,
        Tero Kristo <t-kristo@...com>, linux-gpio@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] pinctl: ti: iodelay: fix error checking on pinctrl_count_index_with_args call

From: Colin Ian King <colin.king@...onical.com>

The call to pinctrl_count_index_with_args checks for a -EINVAL return
however this function calls pinctrl_get_list_and_count and this can
return -ENOENT. Rather than check for a specific error, fix this by
checking for any error return to catch the -ENOENT case.

Addresses-Coverity: ("Improper use of negative")
Fixes: 003910ebc83b ("pinctrl: Introduce TI IOdelay configuration driver")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/pinctrl/ti/pinctrl-ti-iodelay.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/ti/pinctrl-ti-iodelay.c b/drivers/pinctrl/ti/pinctrl-ti-iodelay.c
index e5e7f1f22813..b522ca010332 100644
--- a/drivers/pinctrl/ti/pinctrl-ti-iodelay.c
+++ b/drivers/pinctrl/ti/pinctrl-ti-iodelay.c
@@ -496,7 +496,7 @@ static int ti_iodelay_dt_node_to_map(struct pinctrl_dev *pctldev,
 		return -EINVAL;
 
 	rows = pinctrl_count_index_with_args(np, name);
-	if (rows == -EINVAL)
+	if (rows < 0)
 		return rows;
 
 	*map = devm_kzalloc(iod->dev, sizeof(**map), GFP_KERNEL);
-- 
2.20.1