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Subject[PATCH 3/3] scsi: ufs: reset the ufs device before link startup retry
Date
If the link startup command fails, trigger hardware reset to reset
the UFS device before link startup retry.

Signed-off-by: DooHyun Hwang <dh0421.hwang@samsung.com>
---
drivers/scsi/ufs/ufshcd.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 32cb3b0dcbcf..a87e98631a72 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4644,7 +4644,15 @@ static int ufshcd_link_startup(struct ufs_hba *hba)
(u32)ret);

if (link_startup_again) {
+ int err = 0;
+
link_startup_again = false;
+
+ /* Reset the attached device before retrying */
+ err = ufshcd_vops_device_reset(hba);
+ if (err && (err != -EOPNOTSUPP))
+ ufshcd_update_evt_hist(hba, UFS_EVT_DEV_RESET, err);
+
retries = DME_LINKSTARTUP_RETRIES;
goto link_startup;
}
--
2.29.0
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