Commit 782e2efb authored by Daejun Park's avatar Daejun Park Committed by Martin K. Petersen
Browse files

scsi: ufs: Fix NOP OUT timeout value 

Boot occasionally fails with some Samsung low-power UFS devices. The reason
is that these devices have a little bit higher latency for NOP OUT
responses. This causes boot to fail because the NOP OUT command is issued
during initialization to check whether the device transport protocol is
ready or not. Increase NOP_OUT_TIMEOUT value from 30 to 50ms.

Link: https://lore.kernel.org/r/231786897.01599016081767.JavaMail.epsvc@epcpadp2


Acked-by: default avatarAvri Altman <avri.altman@wdc.com>
Signed-off-by: default avatarDaejun Park <daejun7.park@samsung.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 3d49f742

drivers/scsi/ufs/ufshcd.c

+2 −2
Original line number Diff line number Diff line
@@ -36,8 +36,8 @@ 


/* NOP OUT retries waiting for NOP IN response */

#define NOP_OUT_RETRIES    10

/* Timeout after 30 msecs if NOP OUT hangs without response */

#define NOP_OUT_TIMEOUT    30 /* msecs */

/* Timeout after 50 msecs if NOP OUT hangs without response */

#define NOP_OUT_TIMEOUT    50 /* msecs */



/* Query request retries */

#define QUERY_REQ_RETRIES 3