Prepare for adding an additional ufshcd_clock_scaling_prepare() call
with a different timeout.
Reviewed-by: Avri Altman <avri.altman@xxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
---
drivers/ufs/core/ufshcd.c | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index b5d9088b7de3..a7d1cf2377e1 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -1121,6 +1121,12 @@ static u32 ufshcd_pending_cmds(struct ufs_hba *hba)
return pending;
}
+/*
+ * Wait until all pending SCSI commands and TMFs have finished or the timeout
+ * has expired.
+ *
+ * Return: 0 upon success; -EBUSY upon timeout.
+ */
static int ufshcd_wait_for_doorbell_clr(struct ufs_hba *hba,
u64 wait_timeout_us)
{
@@ -1225,9 +1231,14 @@ static int ufshcd_scale_gear(struct ufs_hba *hba, bool scale_up)
return ret;
}
-static int ufshcd_clock_scaling_prepare(struct ufs_hba *hba)
+/*
+ * Wait until all pending SCSI commands and TMFs have finished or the timeout
+ * has expired.
+ *
+ * Return: 0 upon success; -EBUSY upon timeout.
+ */
+static int ufshcd_clock_scaling_prepare(struct ufs_hba *hba, u64 timeout_us)
{
- #define DOORBELL_CLR_TOUT_US (1000 * 1000) /* 1 sec */
int ret = 0;
/*
* make sure that there are no outstanding requests when
@@ -1237,7 +1248,7 @@ static int ufshcd_clock_scaling_prepare(struct ufs_hba *hba)
down_write(&hba->clk_scaling_lock);
if (!hba->clk_scaling.is_allowed ||
- ufshcd_wait_for_doorbell_clr(hba, DOORBELL_CLR_TOUT_US)) {
+ ufshcd_wait_for_doorbell_clr(hba, timeout_us)) {
ret = -EBUSY;
up_write(&hba->clk_scaling_lock);
ufshcd_scsi_unblock_requests(hba);
@@ -1275,7 +1286,7 @@ static int ufshcd_devfreq_scale(struct ufs_hba *hba, bool scale_up)
int ret = 0;
bool is_writelock = true;
- ret = ufshcd_clock_scaling_prepare(hba);
+ ret = ufshcd_clock_scaling_prepare(hba, 1 * USEC_PER_SEC);
if (ret)
return ret;
