linux-kernel - [PATCH] irqchip/qcom-mpm: Fix IS_ERR() vs NULL check in qcom_mpm

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Message-ID: <22e1f4de-edce-4791-bd2d-2b2e98529492@moroto.mountain>
Date: Thu, 1 Feb 2024 15:17:50 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: Thomas Gleixner <tglx@...utronix.de>,
	Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
	Shawn Guo <shawn.guo@...aro.org>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH] irqchip/qcom-mpm: Fix IS_ERR() vs NULL check in
 qcom_mpm_init()

The devm_ioremap() function doesn't return error pointers, it returns
NULL on error.  Update the check accordingly.

Fixes: 221b110d87c2 ("irqchip/qcom-mpm: Support passing a slice of SRAM as reg space")
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
 drivers/irqchip/irq-qcom-mpm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-qcom-mpm.c b/drivers/irqchip/irq-qcom-mpm.c
index cda5838d2232..7942d8eb3d00 100644
--- a/drivers/irqchip/irq-qcom-mpm.c
+++ b/drivers/irqchip/irq-qcom-mpm.c
@@ -389,8 +389,8 @@ static int qcom_mpm_init(struct device_node *np, struct device_node *parent)
 		/* Don't use devm_ioremap_resource, as we're accessing a shared region. */
 		priv->base = devm_ioremap(dev, res.start, resource_size(&res));
 		of_node_put(msgram_np);
-		if (IS_ERR(priv->base))
-			return PTR_ERR(priv->base);
+		if (!priv->base)
+			return -ENOMEM;
 	} else {
 		/* Otherwise, fall back to simple MMIO. */
 		priv->base = devm_platform_ioremap_resource(pdev, 0);
-- 
2.43.0