4.14-stable review patch. If anyone has any objections, please let me know.
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From: Jaehoon Chung jh80.chung@samsung.com
commit e22842dd64bf86753d3f2b6ea474d73fc1e6ca24 upstream.
Before enabling the clock, dwmmc exynos driver is trying to access the register. Then the kernel panic can be occurred.
Signed-off-by: Jaehoon Chung jh80.chung@samsung.com Reviewed-by: Chanwoo Choi cw00.choi@samsung.com Tested-by: Chanwoo Choi cw00.choi@samsung.com Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mmc/host/dw_mmc-exynos.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
--- a/drivers/mmc/host/dw_mmc-exynos.c +++ b/drivers/mmc/host/dw_mmc-exynos.c @@ -165,9 +165,15 @@ static void dw_mci_exynos_set_clksel_tim static int dw_mci_exynos_runtime_resume(struct device *dev) { struct dw_mci *host = dev_get_drvdata(dev); + int ret; + + ret = dw_mci_runtime_resume(dev); + if (ret) + return ret;
dw_mci_exynos_config_smu(host); - return dw_mci_runtime_resume(dev); + + return ret; }
/**