During system resume, ufshcd_system_resume() won't resume UFS host if
runtime suspended. After that, scsi_bus_resume() try to set SCSI host's
RPM status to RPM_ACTIVE, this will fail because UFS host's RPM status
is still RPM_SUSPENDED. So fix it.
scsi host0: scsi_runtime_suspend()
ufshcd_runtime_suspend()
scsi host0: scsi_bus_suspend()
ufshcd_system_suspend()
----------------------------------
ufshcd_pltfrm_resume()
scsi host0: scsi_bus_resume()
scsi host0: scsi_bus_resume_common()
scsi host0: pm_runtime_set_active(dev)
scsi host0: runtime PM trying to activate child device host0 but parent
(8800000.ufshc) is not active
Fixes: 57d104c153d3 ("ufs: add UFS power management support")
Signed-off-by: Yang Yang <yang.yang@xxxxxxxx>
---
drivers/scsi/ufs/ufshcd.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index b8f573a02713..9e666e1ad58c 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -8767,11 +8767,7 @@ int ufshcd_system_resume(struct ufs_hba *hba)
if (!hba)
return -EINVAL;
- if (!hba->is_powered || pm_runtime_suspended(hba->dev))
- /*
- * Let the runtime resume take care of resuming
- * if runtime suspended.
- */
+ if (!hba->is_powered)
goto out;
else
ret = ufshcd_resume(hba, UFS_SYSTEM_PM);
@@ -8779,8 +8775,15 @@ int ufshcd_system_resume(struct ufs_hba *hba)
trace_ufshcd_system_resume(dev_name(hba->dev), ret,
ktime_to_us(ktime_sub(ktime_get(), start)),
hba->curr_dev_pwr_mode, hba->uic_link_state);
- if (!ret)
+ if (!ret) {
hba->is_sys_suspended = false;
+
+ if (pm_runtime_suspended(hba->dev)) {
+ pm_runtime_disable(hba->dev);
+ pm_runtime_set_active(hba->dev);
+ pm_runtime_enable(hba->dev);
+ }
+ }
return ret;
}
EXPORT_SYMBOL(ufshcd_system_resume);
--
2.17.1
