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scsi: ufs: core: Pass the clock scaling timeout as an argument
Prepare for adding an additional ufshcd_clock_scaling_prepare() call with a different timeout. Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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1 changed files with 15 additions and 4 deletions
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@ -1121,6 +1121,12 @@ static u32 ufshcd_pending_cmds(struct ufs_hba *hba)
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return pending;
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}
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/*
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* Wait until all pending SCSI commands and TMFs have finished or the timeout
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* has expired.
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*
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* Return: 0 upon success; -EBUSY upon timeout.
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*/
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static int ufshcd_wait_for_doorbell_clr(struct ufs_hba *hba,
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u64 wait_timeout_us)
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{
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@ -1225,9 +1231,14 @@ static int ufshcd_scale_gear(struct ufs_hba *hba, bool scale_up)
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return ret;
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}
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static int ufshcd_clock_scaling_prepare(struct ufs_hba *hba)
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/*
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* Wait until all pending SCSI commands and TMFs have finished or the timeout
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* has expired.
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*
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* Return: 0 upon success; -EBUSY upon timeout.
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*/
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static int ufshcd_clock_scaling_prepare(struct ufs_hba *hba, u64 timeout_us)
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{
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#define DOORBELL_CLR_TOUT_US (1000 * 1000) /* 1 sec */
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int ret = 0;
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/*
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* make sure that there are no outstanding requests when
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@ -1237,7 +1248,7 @@ static int ufshcd_clock_scaling_prepare(struct ufs_hba *hba)
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down_write(&hba->clk_scaling_lock);
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if (!hba->clk_scaling.is_allowed ||
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ufshcd_wait_for_doorbell_clr(hba, DOORBELL_CLR_TOUT_US)) {
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ufshcd_wait_for_doorbell_clr(hba, timeout_us)) {
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ret = -EBUSY;
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up_write(&hba->clk_scaling_lock);
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ufshcd_scsi_unblock_requests(hba);
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@ -1275,7 +1286,7 @@ static int ufshcd_devfreq_scale(struct ufs_hba *hba, bool scale_up)
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int ret = 0;
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bool is_writelock = true;
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ret = ufshcd_clock_scaling_prepare(hba);
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ret = ufshcd_clock_scaling_prepare(hba, 1 * USEC_PER_SEC);
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if (ret)
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return ret;
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