From 45c7a4908a307a023e237a64a3eadcafc4836493 Mon Sep 17 00:00:00 2001 From: Jaehoon Chung <jh80.chung@samsung.com> Date: Fri, 21 Oct 2016 19:57:57 +0900 Subject: [PATCH] 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: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com> Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> --- drivers/mmc/host/dw_mmc-pltfm.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c index c0bb0c793e84..dbbc4303bdd0 100644 --- a/drivers/mmc/host/dw_mmc-pltfm.c +++ b/drivers/mmc/host/dw_mmc-pltfm.c @@ -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); } -- GitLab