mmc: sdhci-esdhc-imx: fix runtime pm unblance issue

Since we're using common esdhc_send_command for tuning commands and
the core code will call pm_runtime_put after command is finished.
So we add a pm_runtime_get_sync here to get the blance.

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 22df371a7aa1..5690b1bdab13 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -723,6 +723,7 @@ static void esdhc_prepare_tuning(struct sdhci_host *host, u32 val)
         /* reset controller before tuning or it may fail on some cards */
         esdhc_reset(host, ESDHC_SYS_CTRL_RSTA);
 
+        pm_runtime_get_sync(host->mmc->parent);
         reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
         reg |= ESDHC_MIX_CTRL_EXE_TUNE | ESDHC_MIX_CTRL_SMPCLK_SEL |
                         ESDHC_MIX_CTRL_FBCLK_SEL;