diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2021-10-27 16:06:14 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-11-30 06:37:04 +0300 |
| commit | ddba1cf7a506b09b3583bcac2d64ec88bd4e3a96 (patch) | |
| tree | 8f64fa994690f7ced58bdeb48f63167013569204 /drivers/scsi/ufs/ufs-hisi.c | |
| parent | 659109a45c6c5a3c81a8ce35dea59318c44cfa6e (diff) | |
| download | linux-ddba1cf7a506b09b3583bcac2d64ec88bd4e3a96.tar.xz | |
scsi: ufs: Let devices remain runtime suspended during system suspend
If the UFS Device WLUN is runtime suspended and is in the same power mode,
link state, and b_rpm_dev_flush_capable (BKOP or WB buffer flush etc)
state, then it can remain runtime suspended instead of being runtime
resumed and then system suspended.
The following patch has cleared the way for that to happen:
scsi: core: pm: Only runtime resume if necessary
So amend the logic accordingly.
Note, the ufs-hisi driver uses different RPM and SPM, but it is made
explicit by a new parameter to suspend prepare.
Link: https://lore.kernel.org/r/20211027130614.406985-2-adrian.hunter@intel.com
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/ufs/ufs-hisi.c')
| -rw-r--r-- | drivers/scsi/ufs/ufs-hisi.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/scsi/ufs/ufs-hisi.c b/drivers/scsi/ufs/ufs-hisi.c index 8c7e8d321746..ab1a7ebd89b1 100644 --- a/drivers/scsi/ufs/ufs-hisi.c +++ b/drivers/scsi/ufs/ufs-hisi.c @@ -396,6 +396,12 @@ out: return ret; } +static int ufs_hisi_suspend_prepare(struct device *dev) +{ + /* RPM and SPM are different. Refer ufs_hisi_suspend() */ + return __ufshcd_suspend_prepare(dev, false); +} + static int ufs_hisi_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op, enum ufs_notify_change_status status) { @@ -578,7 +584,7 @@ static int ufs_hisi_remove(struct platform_device *pdev) static const struct dev_pm_ops ufs_hisi_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(ufshcd_system_suspend, ufshcd_system_resume) SET_RUNTIME_PM_OPS(ufshcd_runtime_suspend, ufshcd_runtime_resume, NULL) - .prepare = ufshcd_suspend_prepare, + .prepare = ufs_hisi_suspend_prepare, .complete = ufshcd_resume_complete, }; |