linux-kernel - [PATCH] soc: ixp4xx: npe: Fix an IS

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Date:   Tue, 18 Jun 2019 14:54:10 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     arm@...nel.org
Cc:     Krzysztof Halasa <khalasa@...p.pl>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] soc: ixp4xx: npe: Fix an IS_ERR() vs NULL check in probe

The devm_ioremap_resource() function doesn't return NULL, it returns
error pointers.

Fixes: 0b458d7b10f8 ("soc: ixp4xx: npe: Pass addresses as resources")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
---
 drivers/soc/ixp4xx/ixp4xx-npe.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/soc/ixp4xx/ixp4xx-npe.c b/drivers/soc/ixp4xx/ixp4xx-npe.c
index bc10e3194809..ec90b44fa0cd 100644
--- a/drivers/soc/ixp4xx/ixp4xx-npe.c
+++ b/drivers/soc/ixp4xx/ixp4xx-npe.c
@@ -695,8 +695,8 @@ static int ixp4xx_npe_probe(struct platform_device *pdev)
 			continue; /* NPE already disabled or not present */
 		}
 		npe->regs = devm_ioremap_resource(dev, res);
-		if (!npe->regs)
-			return -ENOMEM;
+		if (IS_ERR(npe->regs))
+			return PTR_ERR(npe->regs);
 
 		if (npe_reset(npe)) {
 			dev_info(dev, "NPE%d at 0x%08x-0x%08x does not reset\n",
-- 
2.20.1