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Subject[PATCH 4.15 020/105] mmc: dw_mmc: exynos: fix the suspend/resume issue for exynos5433
Date
4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

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;
}

/**

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