linux-kernel - [PATCH -next] video: fbdev: imxfb: fix return value check in imxfb

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Date:   Fri, 29 Jul 2022 10:41:34 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <linux-fbdev@...r.kernel.org>
CC:     <u.kleine-koenig@...gutronix.de>, <deller@....de>
Subject: [PATCH -next] video: fbdev: imxfb: fix return value check in imxfb_probe()

If devm_ioremap_resource() fails, it never return NULL, replace
NULL test with IS_ERR().

Fixes: b083c22d5114 ("video: fbdev: imxfb: Convert request_mem_region + ioremap to devm_ioremap_resource")
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/video/fbdev/imxfb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c
index c48477893dd0..d97d7456d15a 100644
--- a/drivers/video/fbdev/imxfb.c
+++ b/drivers/video/fbdev/imxfb.c
@@ -971,9 +971,9 @@ static int imxfb_probe(struct platform_device *pdev)
 	}
 
 	fbi->regs = devm_ioremap_resource(&pdev->dev, res);
-	if (fbi->regs == NULL) {
+	if (IS_ERR(fbi->regs)) {
 		dev_err(&pdev->dev, "Cannot map frame buffer registers\n");
-		ret = -ENOMEM;
+		ret = PTR_ERR(fbi->regs);
 		goto failed_ioremap;
 	}
 
-- 
2.25.1