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scsi: hisi_sas: Put reserved tags in lower region of tagset

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To be consistent with blk-mq, put the reserved tags in the lower region of
the tagset. Eventually we hope to get rid of all this reserved tag
management.

Signed-off-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1666091763-11023-4-git-send-email-john.garry@huawei.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
John Garry 2022-10-18 19:15:59 +08:00 • committed by Martin K. Petersen
parent 295fd2330a
commit f7d190a94e
1 changed files with 7 additions and 7 deletions
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14
drivers/scsi/hisi_sas/hisi_sas_main.c
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@ -183,16 +183,16 @@ static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
void *bitmap = hisi_hba->slot_index_tags;
if (rq)
return rq->tag;
return rq->tag + HISI_SAS_RESERVED_IPTT;
spin_lock(&hisi_hba->lock);
index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
index = find_next_zero_bit(bitmap, HISI_SAS_RESERVED_IPTT,
hisi_hba->last_slot_index + 1);
if (index >= hisi_hba->slot_index_count) {
if (index >= HISI_SAS_RESERVED_IPTT) {
index = find_next_zero_bit(bitmap,
hisi_hba->slot_index_count,
HISI_SAS_UNRESERVED_IPTT);
if (index >= hisi_hba->slot_index_count) {
HISI_SAS_RESERVED_IPTT,
0);
if (index >= HISI_SAS_RESERVED_IPTT) {
spin_unlock(&hisi_hba->lock);
return -SAS_QUEUE_FULL;
}
@ -2216,7 +2216,7 @@ int hisi_sas_alloc(struct hisi_hba *hisi_hba)
if (!hisi_hba->sata_breakpoint)
goto err_out;
hisi_hba->last_slot_index = HISI_SAS_UNRESERVED_IPTT;
hisi_hba->last_slot_index = 0;
hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
if (!hisi_hba->wq) {