linux-kernel - [PATCH] plat-omap: check return value of ioremap()

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Message-Id: <20220425110845.415439-1-renyu@nfschina.com>
Date:   Mon, 25 Apr 2022 19:08:45 +0800
From:   Ren Yu <renyu@...china.com>
To:     tony@...mide.com
Cc:     aaro.koskinen@....fi, linux@...linux.org.uk,
        linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, liqiong@...china.com,
        yuzhe@...china.com, Ren Yu <renyu@...china.com>
Subject: [PATCH] plat-omap: check return value of ioremap()

When ioremap() failed,return err

Signed-off-by: Ren Yu <renyu@...china.com>
---
 arch/arm/plat-omap/debug-leds.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/plat-omap/debug-leds.c b/arch/arm/plat-omap/debug-leds.c
index 2b698d074874..bf5034e10f6e 100644
--- a/arch/arm/plat-omap/debug-leds.c
+++ b/arch/arm/plat-omap/debug-leds.c
@@ -109,6 +109,9 @@ static int fpga_probe(struct platform_device *pdev)
 		return -ENODEV;
 
 	fpga = ioremap(iomem->start, resource_size(iomem));
+	if (!fpga)
+		return -ENOMEM;
+
 	writew_relaxed(0xff, &fpga->leds);
 
 	for (i = 0; i < ARRAY_SIZE(dbg_leds); i++) {
-- 
2.25.1