linux-kernel - [PATCH 2/2] slimbus: qcom-ctrl: Fix devm_ioremap

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Message-ID: <20180109092644.wa4ubwxkcvc3lyza@mwanda>
Date:   Tue, 9 Jan 2018 12:26:44 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 2/2] slimbus: qcom-ctrl: Fix devm_ioremap_resource() error
 handling

devm_ioremap_resource() returns error pointers, not NULL so the check
needs to be fixed.

Fixes: ad7fcbc308b0 ("slimbus: qcom: Add Qualcomm Slimbus controller driver")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/slimbus/qcom-ctrl.c b/drivers/slimbus/qcom-ctrl.c
index 3ab59209cbdc..6bf95bf33299 100644
--- a/drivers/slimbus/qcom-ctrl.c
+++ b/drivers/slimbus/qcom-ctrl.c
@@ -528,9 +528,9 @@ static int qcom_slim_probe(struct platform_device *pdev)
 
 	slim_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ctrl");
 	ctrl->base = devm_ioremap_resource(ctrl->dev, slim_mem);
-	if (!ctrl->base) {
+	if (IS_ERR(ctrl->base)) {
 		dev_err(&pdev->dev, "IOremap failed\n");
-		return -ENOMEM;
+		return PTR_ERR(ctrl->base);
 	}
 
 	sctrl->set_laddr = qcom_set_laddr;