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| author | Jaehoon Chung <jh80.chung@samsung.com> | 2016-10-21 19:57:57 +0900 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-10-25 10:39:40 +0200 |
| commit | 45c7a4908a307a023e237a64a3eadcafc4836493 (patch) | |
| tree | 5b2d7e769f68865a6531fc2455ebf33345f25f01 /drivers/mmc/host/dw_mmc-pltfm.c | |
| parent | 07d9a380680d1c0eb51ef87ff2eab5c994949e69 (diff) | |
| download | blackbird-obmc-linux-45c7a4908a307a023e237a64a3eadcafc4836493.tar.gz blackbird-obmc-linux-45c7a4908a307a023e237a64a3eadcafc4836493.zip | |
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>
Diffstat (limited to 'drivers/mmc/host/dw_mmc-pltfm.c')
| -rw-r--r-- | drivers/mmc/host/dw_mmc-pltfm.c | 5 |
1 files 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); } |
