On 2021-03-02 03:19, Adrian Hunter wrote:
If ufshcd_probe_hba() fails it sets ufshcd_state to UFSHCD_STATE_ERROR,
however, if it is called again, as it is within a loop in
ufshcd_reset_and_restore(), and succeeds, then it will not set the
state
back to UFSHCD_STATE_OPERATIONAL unless the state was
UFSHCD_STATE_RESET.
That can result in the state being UFSHCD_STATE_ERROR even though
ufshcd_reset_and_restore() is successful and returns zero.
Fix by initializing the state to UFSHCD_STATE_RESET in the start of
each
loop in ufshcd_reset_and_restore(). If there is an error,
ufshcd_reset_and_restore() will change the state to UFSHCD_STATE_ERROR,
otherwise ufshcd_probe_hba() will have set the state appropriately.
Fixes: 4db7a2360597 ("scsi: ufs: Fix concurrency of error handler and
other error recovery paths")
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
drivers/scsi/ufs/ufshcd.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 77161750c9fb..91a403afe038 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -7031,6 +7031,8 @@ static int ufshcd_reset_and_restore(struct
ufs_hba *hba)
spin_unlock_irqrestore(hba->host->host_lock, flags);
do {
+ hba->ufshcd_state = UFSHCD_STATE_RESET;
+
/* Reset the attached device */
ufshcd_device_reset(hba);
Hi Adrian,
I've proposed a fix to get it addressed -
https://lore.kernel.org/patchwork/patch/1383817/
Thanks,
Can Guo.
