add pm_runtime_get_sync() before access MSDC_PS register
Signed-off-by: Chaotian Jing <chaotian.jing@xxxxxxxxxxxx>
---
drivers/mmc/host/mtk-sd.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 82a97ac..a56b16d 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -1054,13 +1054,15 @@ static int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios)
static int msdc_card_busy(struct mmc_host *mmc)
{
struct msdc_host *host = mmc_priv(mmc);
- u32 status = readl(host->base + MSDC_PS);
+ u32 status;
- /* check if any pin between dat[0:3] is low */
- if (((status >> 16) & 0xf) != 0xf)
- return 1;
+ pm_runtime_get_sync(host->dev);
+ status = readl(host->base + MSDC_PS);
+ pm_runtime_mark_last_busy(host->dev);
+ pm_runtime_put_autosuspend(host->dev);
- return 0;
+ /* check if any pin between dat[0:3] is low */
+ return !!(((status >> 16) & 0xf) != 0xf);
}
static void msdc_request_timeout(struct work_struct *work)
--
1.8.1.1.dirty
--
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