In some Samsung UFS devices, there is some booting fail issue with low-power UFS device. The reason of this issue is the UFS device has a little bit longer latency for NOP OUT response. It causes booting fail because NOP OUT command is issued during initialization to check whether the device transport protocol is ready or not. This issue is resolved by releasing NOP_OUT_TIMEOUT value. NOP_OUT_TIMEOUT: 30ms -> 50ms Signed-off-by: Daejun Park <daejun7.park@xxxxxxxxxxx> --- drivers/scsi/ufs/ufshcd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 06e2439d523c..5cbd0e9e4ef8 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -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 -- 2.17.1
