If read the MAXQ field value verbatim, can use a value that is one less than the supported Queue. So read the MAXQ field value and incremented it by one below is the specification Maximum number of Queues (MAXQ): Maximum number of Queues this controller can support. In this version of specification, maximum value is 31. NOTE To support 1:1 topology, the Host HW controller must support HW resources for MAXQ number of Completion Queues too. Host SW may use less number of completion queues for N:1 topology..:1 Queue 0: 1 Queue 1: 2 Queues … 31: 32 Queues 32-255 : reserved Signed-off-by: SEO HOYOUNG <hy50.seo@xxxxxxxxxxx> --- drivers/ufs/core/ufs-mcq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c index 31df052fbc41..a1ee3318c605 100644 --- a/drivers/ufs/core/ufs-mcq.c +++ b/drivers/ufs/core/ufs-mcq.c @@ -150,7 +150,7 @@ static int ufshcd_mcq_config_nr_queues(struct ufs_hba *hba) u32 hba_maxq, rem, tot_queues; struct Scsi_Host *host = hba->host; - hba_maxq = FIELD_GET(MAX_QUEUE_SUP, hba->mcq_capabilities); + hba_maxq = FIELD_GET(MAX_QUEUE_SUP, hba->mcq_capabilities) + 1; tot_queues = UFS_MCQ_NUM_DEV_CMD_QUEUES + read_queues + poll_queues + rw_queues; -- 2.26.0
