Hi, SEO HOYOUNG <hy50.seo@xxxxxxxxxxx> 於 2023年4月19日 週三 下午5:56寫道： > > 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 > This seems to be the same patch uploaded by Powen: https://patchwork.kernel.org/project/linux-scsi/patch/20230307065448.15279-4-powen.kao@xxxxxxxxxxxx/
