hisi_sas: Remove dependency on of_irq_count

Originally the driver would use of_irq_count to calculate how much
memory is required for storing the interrupt names, since the number of
interrupt sources for the controller is variable.  Since of_irq_count
cannot be used by the driver, use fixed names.
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/hisi_sas/hisi_sas.h

@@ -38,8 +38,6 @@
 #define HISI_SAS_MAX_SSP_RESP_SZ (sizeof(struct ssp_frame_hdr) + 1024)
 #define HISI_SAS_MAX_SMP_RESP_SZ 1028
 
-#define HISI_SAS_NAME_LEN 32
-
 struct hisi_hba;
 
 enum {
@@ -178,7 +176,6 @@ struct hisi_hba {
 
 	int	queue_count;
 	int	queue;
-	char	*int_names;
 	struct hisi_sas_slot	*slot_prep;
 
 	struct dma_pool *sge_page_pool;

drivers/scsi/hisi_sas/hisi_sas_main.c

@@ -1160,7 +1160,6 @@ static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
 	struct device *dev = &pdev->dev;
 	struct device_node *np = pdev->dev.of_node;
 	struct property *sas_addr_prop;
-	int num;
 
 	shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
 	if (!shost)
@@ -1197,13 +1196,6 @@ static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
 	if (of_property_read_u32(np, "queue-count", &hisi_hba->queue_count))
 		goto err_out;
 
-	num = of_irq_count(np);
-	hisi_hba->int_names = devm_kcalloc(dev, num,
-					   HISI_SAS_NAME_LEN,
-					   GFP_KERNEL);
-	if (!hisi_hba->int_names)
-		goto err_out;
-
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	hisi_hba->regs = devm_ioremap_resource(dev, res);
 	if (IS_ERR(hisi_hba->regs))

drivers/scsi/hisi_sas/hisi_sas_v1_hw.c

@@ -1660,18 +1660,6 @@ static irqreturn_t fatal_axi_int_v1_hw(int irq, void *p)
 	return IRQ_HANDLED;
 }
 
-static const char phy_int_names[HISI_SAS_PHY_INT_NR][32] = {
-	{"Bcast"},
-	{"Phy Up"},
-	{"Abnormal"},
-};
-
-static const char cq_int_name[32] = "cq";
-static const char fatal_int_name[HISI_SAS_FATAL_INT_NR][32] = {
-	"fatal ecc",
-	"fatal axi"
-};
-
 static irq_handler_t phy_interrupts[HISI_SAS_PHY_INT_NR] = {
 	int_bcast_v1_hw,
 	int_phyup_v1_hw,
@@ -1687,7 +1675,6 @@ static int interrupt_init_v1_hw(struct hisi_hba *hisi_hba)
 {
 	struct device *dev = &hisi_hba->pdev->dev;
 	struct device_node *np = dev->of_node;
-	char *int_names = hisi_hba->int_names;
 	int i, j, irq, rc, idx;
 
 	if (!np)
@@ -1706,13 +1693,8 @@ static int interrupt_init_v1_hw(struct hisi_hba *hisi_hba)
 				return -ENOENT;
 			}
 
-			(void)snprintf(&int_names[idx * HISI_SAS_NAME_LEN],
-				       HISI_SAS_NAME_LEN,
-				       "%s %s:%d", dev_name(dev),
-				       phy_int_names[j], i);
 			rc = devm_request_irq(dev, irq, phy_interrupts[j], 0,
-					&int_names[idx * HISI_SAS_NAME_LEN],
-					phy);
+					      DRV_NAME " phy", phy);
 			if (rc) {
 				dev_err(dev, "irq init: could not request "
 					"phy interrupt %d, rc=%d\n",
@@ -1730,12 +1712,9 @@ static int interrupt_init_v1_hw(struct hisi_hba *hisi_hba)
 				idx);
 			return -ENOENT;
 		}
-		(void)snprintf(&int_names[idx * HISI_SAS_NAME_LEN],
-			       HISI_SAS_NAME_LEN,
-			       "%s %s:%d", dev_name(dev), cq_int_name, i);
+
 		rc = devm_request_irq(dev, irq, cq_interrupt_v1_hw, 0,
-				      &int_names[idx * HISI_SAS_NAME_LEN],
-				      &hisi_hba->cq[i]);
+				      DRV_NAME " cq", &hisi_hba->cq[i]);
 		if (rc) {
 			dev_err(dev, "irq init: could not request cq interrupt %d, rc=%d\n",
 				irq, rc);
@@ -1751,12 +1730,9 @@ static int interrupt_init_v1_hw(struct hisi_hba *hisi_hba)
 				idx);
 			return -ENOENT;
 		}
-		(void)snprintf(&int_names[idx * HISI_SAS_NAME_LEN],
-			       HISI_SAS_NAME_LEN,
-			       "%s %s:%d", dev_name(dev), fatal_int_name[i], i);
+
 		rc = devm_request_irq(dev, irq, fatal_interrupts[i], 0,
-				      &int_names[idx * HISI_SAS_NAME_LEN],
-				      hisi_hba);
+				      DRV_NAME " fatal", hisi_hba);
 		if (rc) {
 			dev_err(dev,
 				"irq init: could not request fatal interrupt %d, rc=%d\n",