scsi: hisi_sas: correct an error setting of memory allocation size for DQ at Debugfs feature

We allocate memory base on hisi_hba->hw->complete_hdr_size for DQ, but
it was wrong.For the structure, which used to save DQ, is
struct hisi_sas_cmd_hdr, and this size is not saved at
variables: complete_hdr_size.

So we need to correct it.
Signed-off-by: NLuo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: NJohn Garry <john.garry@huawei.com>

Feature or Bugfix:Bugfix
Signed-off-by: Nluojiaxing <luojiaxing@huawei.com>
Reviewed-by: Nchenxiang <chenxiang66@hisilicon.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/scsi/hisi_sas/hisi_sas_main.c

@@ -2641,7 +2641,7 @@ static void hisi_sas_debugfs_snapshot_cq_reg(struct hisi_hba *hisi_hba)
 
 static void hisi_sas_debugfs_snapshot_dq_reg(struct hisi_hba *hisi_hba)
 {
-	int queue_entry_size = hisi_hba->hw->complete_hdr_size;
+	int queue_entry_size = sizeof(struct hisi_sas_cmd_hdr);
 	int i;
 
 	for (i = 0; i < hisi_hba->queue_count; i++)
@@ -3104,7 +3104,7 @@ void hisi_sas_debugfs_init(struct hisi_hba *hisi_hba)
 	}
 
 	/* Alloc buffer for dq */
-	sz = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
+	sz = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
 	for (d = 0; d < hisi_hba->queue_count; d++) {
 		hisi_hba->debugfs_cmd_hdr[d] =
 			devm_kmalloc(dev, sz, GFP_KERNEL);