scsi: qla4xxx: Use zeroing allocator rather than allocator/memset

Use dma_zalloc_coherent instead of dma_alloc_coherent followed by memset
0.

Generated-by: scripts/coccinelle/api/alloc/kzalloc-simple.cocci
Suggested-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
Acked-by: Manish Rangankar <Manish.Rangankar@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla4xxx/ql4_init.c

@@ -153,7 +153,7 @@ int qla4xxx_get_sys_info(struct scsi_qla_host *ha)
 	dma_addr_t sys_info_dma;
 	int status = QLA_ERROR;
 
-	sys_info = dma_alloc_coherent(&ha->pdev->dev, sizeof(*sys_info),
+	sys_info = dma_zalloc_coherent(&ha->pdev->dev, sizeof(*sys_info),
 				       &sys_info_dma, GFP_KERNEL);
 	if (sys_info == NULL) {
 		DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
@@ -161,7 +161,6 @@ int qla4xxx_get_sys_info(struct scsi_qla_host *ha)
 
 		goto exit_get_sys_info_no_free;
 	}
-	memset(sys_info, 0, sizeof(*sys_info));
 
 	/* Get flash sys info */
 	if (qla4xxx_get_flash(ha, sys_info_dma, FLASH_OFFSET_SYS_INFO,

drivers/scsi/qla4xxx/ql4_mbx.c

@@ -625,7 +625,7 @@ int qla4xxx_initialize_fw_cb(struct scsi_qla_host * ha)
 	uint32_t mbox_sts[MBOX_REG_COUNT];
 	int status = QLA_ERROR;
 
-	init_fw_cb = dma_alloc_coherent(&ha->pdev->dev,
+	init_fw_cb = dma_zalloc_coherent(&ha->pdev->dev,
 					 sizeof(struct addr_ctrl_blk),
 					 &init_fw_cb_dma, GFP_KERNEL);
 	if (init_fw_cb == NULL) {
@@ -633,7 +633,6 @@ int qla4xxx_initialize_fw_cb(struct scsi_qla_host * ha)
 			      ha->host_no, __func__));
 		goto exit_init_fw_cb_no_free;
 	}
-	memset(init_fw_cb, 0, sizeof(struct addr_ctrl_blk));
 
 	/* Get Initialize Firmware Control Block. */
 	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
@@ -710,7 +709,7 @@ int qla4xxx_get_dhcp_ip_address(struct scsi_qla_host * ha)
 	uint32_t mbox_cmd[MBOX_REG_COUNT];
 	uint32_t mbox_sts[MBOX_REG_COUNT];
 
-	init_fw_cb = dma_alloc_coherent(&ha->pdev->dev,
+	init_fw_cb = dma_zalloc_coherent(&ha->pdev->dev,
 					 sizeof(struct addr_ctrl_blk),
 					 &init_fw_cb_dma, GFP_KERNEL);
 	if (init_fw_cb == NULL) {
@@ -720,7 +719,6 @@ int qla4xxx_get_dhcp_ip_address(struct scsi_qla_host * ha)
 	}
 
 	/* Get Initialize Firmware Control Block. */
-	memset(init_fw_cb, 0, sizeof(struct addr_ctrl_blk));
 	if (qla4xxx_get_ifcb(ha, &mbox_cmd[0], &mbox_sts[0], init_fw_cb_dma) !=
 	    QLA_SUCCESS) {
 		DEBUG2(printk("scsi%ld: %s: Failed to get init_fw_ctrl_blk\n",
@@ -1342,7 +1340,7 @@ int qla4xxx_about_firmware(struct scsi_qla_host *ha)
 	uint32_t mbox_sts[MBOX_REG_COUNT];
 	int status = QLA_ERROR;
 
-	about_fw = dma_alloc_coherent(&ha->pdev->dev,
+	about_fw = dma_zalloc_coherent(&ha->pdev->dev,
 				       sizeof(struct about_fw_info),
 				       &about_fw_dma, GFP_KERNEL);
 	if (!about_fw) {
@@ -1351,7 +1349,6 @@ int qla4xxx_about_firmware(struct scsi_qla_host *ha)
 		return status;
 	}
 
-	memset(about_fw, 0, sizeof(struct about_fw_info));
 	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
 	memset(&mbox_sts, 0, sizeof(mbox_sts));
 

drivers/scsi/qla4xxx/ql4_nx.c

@@ -4050,7 +4050,7 @@ int qla4_8xxx_get_sys_info(struct scsi_qla_host *ha)
 	dma_addr_t sys_info_dma;
 	int status = QLA_ERROR;
 
-	sys_info = dma_alloc_coherent(&ha->pdev->dev, sizeof(*sys_info),
+	sys_info = dma_zalloc_coherent(&ha->pdev->dev, sizeof(*sys_info),
 				       &sys_info_dma, GFP_KERNEL);
 	if (sys_info == NULL) {
 		DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
@@ -4058,7 +4058,6 @@ int qla4_8xxx_get_sys_info(struct scsi_qla_host *ha)
 		return status;
 	}
 
-	memset(sys_info, 0, sizeof(*sys_info));
 	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
 	memset(&mbox_sts, 0, sizeof(mbox_sts));
 

drivers/scsi/qla4xxx/ql4_os.c

@@ -2689,7 +2689,7 @@ qla4xxx_iface_set_param(struct Scsi_Host *shost, void *data, uint32_t len)
 	uint32_t rem = len;
 	struct nlattr *attr;
 
-	init_fw_cb = dma_alloc_coherent(&ha->pdev->dev,
+	init_fw_cb = dma_zalloc_coherent(&ha->pdev->dev,
 					 sizeof(struct addr_ctrl_blk),
 					 &init_fw_cb_dma, GFP_KERNEL);
 	if (!init_fw_cb) {
@@ -2698,7 +2698,6 @@ qla4xxx_iface_set_param(struct Scsi_Host *shost, void *data, uint32_t len)
 		return -ENOMEM;
 	}
 
-	memset(init_fw_cb, 0, sizeof(struct addr_ctrl_blk));
 	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
 	memset(&mbox_sts, 0, sizeof(mbox_sts));
 
@@ -4196,7 +4195,7 @@ static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
 			  sizeof(struct shadow_regs) +
 			  MEM_ALIGN_VALUE +
 			  (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
-	ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
+	ha->queues = dma_zalloc_coherent(&ha->pdev->dev, ha->queues_len,
 					 &ha->queues_dma, GFP_KERNEL);
 	if (ha->queues == NULL) {
 		ql4_printk(KERN_WARNING, ha,
@@ -4204,7 +4203,6 @@ static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
 
 		goto mem_alloc_error_exit;
 	}
-	memset(ha->queues, 0, ha->queues_len);
 
 	/*
 	 * As per RISC alignment requirements -- the bus-address must be a