linux-kernel - [PATCH 1/2] bus: fsl-mc: add back accidentally dropped error check

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Date:   Thu,  5 Nov 2020 17:30:49 +0200
From:   Laurentiu Tudor <laurentiu.tudor@....com>
To:     linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     diana.craciun@....nxp.com, ioana.ciornei@....com,
        Laurentiu Tudor <laurentiu.tudor@....com>
Subject: [PATCH 1/2] bus: fsl-mc: add back accidentally dropped error check

A previous patch accidentally dropped an error check, so add it back.

Fixes: aef85b56c3c1 ("bus: fsl-mc: MC control registers are not always available")
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@....com>
---
 drivers/bus/fsl-mc/fsl-mc-bus.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c
index 76a6ee505d33..806766b1b45f 100644
--- a/drivers/bus/fsl-mc/fsl-mc-bus.c
+++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
@@ -967,8 +967,11 @@ static int fsl_mc_bus_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, mc);
 
 	plat_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	if (plat_res)
+	if (plat_res) {
 		mc->fsl_mc_regs = devm_ioremap_resource(&pdev->dev, plat_res);
+		if (IS_ERR(mc->fsl_mc_regs))
+			return PTR_ERR(mc->fsl_mc_regs);
+	}
 
 	if (mc->fsl_mc_regs && IS_ENABLED(CONFIG_ACPI) &&
 	    !dev_of_node(&pdev->dev)) {
-- 
2.17.1