dw_mci_exynos_resume_noirq() performs DWMMC register access without ensuring that respective clocks are enabled. This might cause external abort on some systems (observed on Exynos5433 based boards). Fix this by adding needed prepare_enable/disable_unprepare calls. Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> --- drivers/mmc/host/dw_mmc-exynos.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c index 3164681108ae..6125b68726b0 100644 --- a/drivers/mmc/host/dw_mmc-exynos.c +++ b/drivers/mmc/host/dw_mmc-exynos.c @@ -193,6 +193,9 @@ static int dw_mci_exynos_resume_noirq(struct device *dev) struct dw_mci_exynos_priv_data *priv = host->priv; u32 clksel; + clk_prepare_enable(host->biu_clk); + clk_prepare_enable(host->ciu_clk); + if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 || priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) clksel = mci_readl(host, CLKSEL64); @@ -207,6 +210,9 @@ static int dw_mci_exynos_resume_noirq(struct device *dev) mci_writel(host, CLKSEL, clksel); } + clk_disable_unprepare(host->biu_clk); + clk_disable_unprepare(host->ciu_clk); + return 0; } #else -- 2.17.1 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
