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mmc: mtk-sd: check for valid optional memory resource 

'top_base' memory region is optional. Check that the resource is valid
before using it. This avoid getting a "invalid resource" error message
printed by the kernel.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
hifive-unleashed-5.2
Fabien Parent 2019-04-03 21:30:50 +02:00 committed by Ulf Hansson
parent c278150e0d
commit b65be63551
1 changed files with 5 additions and 3 deletions
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8
drivers/mmc/host/mtk-sd.c
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@ -2134,9 +2134,11 @@ static int msdc_drv_probe(struct platform_device *pdev)
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
host->top_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(host->top_base))
host->top_base = NULL;
if (res) {
host->top_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(host->top_base))
host->top_base = NULL;
}
ret = mmc_regulator_get_supply(mmc);
if (ret)