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Date: Thu, 30 Sep 2021 13:09:28 +0300 From: Claudiu Beznea <claudiu.beznea@...rochip.com> To: <sre@...nel.org>, <nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>, <ludovic.desroches@...rochip.com> CC: <linux-pm@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, Claudiu Beznea <claudiu.beznea@...rochip.com>, Cristian Birsan <cristian.birsan@...rochip.com> Subject: [PATCH] power: reset: at91-reset: check properly the return value of devm_of_iomap devm_of_iomap() returns error code or valid pointer. Check its return value with IS_ERR(). Fixes: bd3127733f2c ("power: reset: at91-reset: use devm_of_iomap") Reported-by: Cristian Birsan <cristian.birsan@...rochip.com> Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com> --- drivers/power/reset/at91-reset.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c index 026649409135..64def79d557a 100644 --- a/drivers/power/reset/at91-reset.c +++ b/drivers/power/reset/at91-reset.c @@ -193,7 +193,7 @@ static int __init at91_reset_probe(struct platform_device *pdev) return -ENOMEM; reset->rstc_base = devm_of_iomap(&pdev->dev, pdev->dev.of_node, 0, NULL); - if (!reset->rstc_base) { + if (IS_ERR(reset->rstc_base)) { dev_err(&pdev->dev, "Could not map reset controller address\n"); return -ENODEV; } @@ -203,7 +203,7 @@ static int __init at91_reset_probe(struct platform_device *pdev) for_each_matching_node_and_match(np, at91_ramc_of_match, &match) { reset->ramc_lpr = (u32)match->data; reset->ramc_base[idx] = devm_of_iomap(&pdev->dev, np, 0, NULL); - if (!reset->ramc_base[idx]) { + if (IS_ERR(reset->ramc_base[idx])) { dev_err(&pdev->dev, "Could not map ram controller address\n"); of_node_put(np); return -ENODEV; -- 2.25.1
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