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Commit 45c7a490 authored by Jaehoon Chung's avatar Jaehoon Chung Committed by Ulf Hansson
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mmc: dw_mmc-pltfm: fix the potential NULL pointer dereference 



platform_get_resource can be returned the NULL pointer.
Then regs->start should be referred to NULL Pointer.
devm_ioremap_resource() checks whether res is NULL or not.

Signed-off-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: default avatarShawn Lin <shawn.lin@rock-chips.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 07d9a380

drivers/mmc/host/dw_mmc-pltfm.c

+3 −2
Original line number Diff line number Diff line
@@ -46,12 +46,13 @@ int dw_mci_pltfm_register(struct platform_device *pdev, 
	host->pdata = pdev->dev.platform_data;



	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	/* Get registers' physical base address */

	host->phy_regs = regs->start;

	host->regs = devm_ioremap_resource(&pdev->dev, regs);

	if (IS_ERR(host->regs))

		return PTR_ERR(host->regs);



	/* Get registers' physical base address */

	host->phy_regs = regs->start;



	platform_set_drvdata(pdev, host);

	return dw_mci_probe(host);

}