linux-kernel - [PATCH] i2c: mlxbf: Fix an error pointer vs NULL check

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Message-Id: <20201204074111.1359-1-vulab@iscas.ac.cn>
Date:   Fri,  4 Dec 2020 07:41:11 +0000
From:   Xu Wang <vulab@...as.ac.cn>
To:     kblaiech@...dia.com
Cc:     linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] i2c: mlxbf: Fix an error pointer vs NULL check

In case of error, the function devm_ioremap() returns NULL pointer not
ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.

Signed-off-by: Xu Wang <vulab@...as.ac.cn>
---
 drivers/i2c/busses/i2c-mlxbf.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mlxbf.c b/drivers/i2c/busses/i2c-mlxbf.c
index 33574d40ea9c..73a58beb7b82 100644
--- a/drivers/i2c/busses/i2c-mlxbf.c
+++ b/drivers/i2c/busses/i2c-mlxbf.c
@@ -1258,9 +1258,9 @@ static int mlxbf_i2c_get_gpio(struct platform_device *pdev,
 		return -EFAULT;
 
 	gpio_res->io = devm_ioremap(dev, params->start, size);
-	if (IS_ERR(gpio_res->io)) {
+	if (!gpio_res->io) {
 		devm_release_mem_region(dev, params->start, size);
-		return PTR_ERR(gpio_res->io);
+		return -ENOMEM;
 	}
 
 	return 0;
@@ -1323,9 +1323,9 @@ static int mlxbf_i2c_get_corepll(struct platform_device *pdev,
 		return -EFAULT;
 
 	corepll_res->io = devm_ioremap(dev, params->start, size);
-	if (IS_ERR(corepll_res->io)) {
+	if (!corepll_res->io) {
 		devm_release_mem_region(dev, params->start, size);
-		return PTR_ERR(corepll_res->io);
+		return -ENOMEM;
 	}
 
 	return 0;
-- 
2.17.1