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FROMLIST: scsi: ufs: Pass the clock scaling timeout as an argument

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Prepare for adding an additional ufshcd_clock_scaling_prepare() call
with a different timeout.

Bug: 227177294
Link: https://lore.kernel.org/all/20220427233855.2685505-4-bvanassche@acm.org/
Change-Id: I67a569b074c292a3c37f20a1b1e36f95b682c5e8
Signed-off-by: Bart Van Assche <bvanassche@google.com>
This commit is contained in:
Bart Van Assche
2022-03-29 15:37:26 -07:00
parent bbbbbc3ae7
commit 3e234bd251
1 changed files with 15 additions and 4 deletions
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19
drivers/scsi/ufs/ufshcd.c
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@@ -1078,6 +1078,12 @@ static bool ufshcd_is_devfreq_scaling_required(struct ufs_hba *hba,
return false;
}
/*
* 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)
{
@@ -1182,9 +1188,14 @@ 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
@@ -1193,7 +1204,7 @@ static int ufshcd_clock_scaling_prepare(struct ufs_hba *hba)
ufshcd_scsi_block_requests(hba);
down_write(&hba->clk_scaling_lock);
if (ufshcd_wait_for_doorbell_clr(hba, DOORBELL_CLR_TOUT_US)) {
if (ufshcd_wait_for_doorbell_clr(hba, timeout_us)) {
ret = -EBUSY;
up_write(&hba->clk_scaling_lock);
ufshcd_scsi_unblock_requests(hba);
@@ -1234,7 +1245,7 @@ static int ufshcd_devfreq_scale(struct ufs_hba *hba, bool scale_up)
if (!hba->clk_scaling.is_allowed)
return -EBUSY;
ret = ufshcd_clock_scaling_prepare(hba);
ret = ufshcd_clock_scaling_prepare(hba, 1 * USEC_PER_SEC);
if (ret)
return ret;