Staging: unisys: Replace kmalloc/memset with kzalloc

This patch solves the Coccinelle warning: "kzalloc should be used instead of
kmalloc/memset".

Signed-off-by: Andreea-Cristina Bernat <bernat.ada@gmail.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>

drivers/staging/unisys/virthba/virthba.c

@@ -1060,12 +1060,12 @@ virthba_slave_alloc(struct scsi_device *scsidev)
 		    (vdisk->next->lun == scsidev->lun))
 			return 0;
 	}
-	tmpvdisk = kmalloc(sizeof(struct virtdisk_info), GFP_ATOMIC);
+	tmpvdisk = kzalloc(sizeof(struct virtdisk_info), GFP_ATOMIC);
 	if (!tmpvdisk) {	/* error allocating */
 		LOGERR("Could not allocate memory for disk\n");
 		return 0;
 	}
-	memset(tmpvdisk, 0, sizeof(struct virtdisk_info));
+
 	tmpvdisk->channel = scsidev->channel;
 	tmpvdisk->id = scsidev->id;
 	tmpvdisk->lun = scsidev->lun;

drivers/staging/unisys/virtpci/virtpci.c

@@ -909,15 +909,13 @@ static int virtpci_device_add(struct device *parentbus, int devtype,
 	}
 
 	/* add a Virtual Device */
-	virtpcidev = kmalloc(sizeof(struct virtpci_dev), GFP_ATOMIC);
+	virtpcidev = kzalloc(sizeof(struct virtpci_dev), GFP_ATOMIC);
 	if (virtpcidev == NULL) {
 		LOGERR("can't add device - malloc FALLED\n");
 		POSTCODE_LINUX_2(MALLOC_FAILURE_PC, POSTCODE_SEVERITY_ERR);
 		return 0;
 	}
 
-	memset(virtpcidev, 0, sizeof(struct virtpci_dev));
-
 	/* initialize stuff unique to virtpci_dev struct */
 	virtpcidev->devtype = devtype;
 	if (devtype == VIRTHBA_TYPE) {

drivers/staging/unisys/visorchipset/parser.c

@@ -65,7 +65,7 @@ parser_init_guts(U64 addr, U32 bytes, BOOL isLocal,
 			*tryAgain = TRUE;
 		RETPTR(NULL);
 	}
-	ctx = kmalloc(allocbytes, GFP_KERNEL|__GFP_NORETRY);
+	ctx = kzalloc(allocbytes, GFP_KERNEL|__GFP_NORETRY);
 	if (ctx == NULL) {
 		ERRDRV("%s (%s:%d) - failed to allocate %d bytes",
 		       __func__, __FILE__, __LINE__, allocbytes);
@@ -73,7 +73,7 @@ parser_init_guts(U64 addr, U32 bytes, BOOL isLocal,
 			*tryAgain = TRUE;
 		RETPTR(NULL);
 	}
-	memset(ctx, 0, allocbytes);
+
 	ctx->allocbytes = allocbytes;
 	ctx->param_bytes = bytes;
 	ctx->curr = NULL;

drivers/staging/unisys/visorchipset/visorchipset_main.c

@@ -1081,16 +1081,15 @@ bus_create(CONTROLVM_MESSAGE *inmsg)
 				 POSTCODE_SEVERITY_ERR);
 		RETINT(-CONTROLVM_RESP_ERROR_ALREADY_DONE);
 	}
-	pBusInfo = kmalloc(sizeof(VISORCHIPSET_BUS_INFO), GFP_KERNEL);
+	pBusInfo = kzalloc(sizeof(VISORCHIPSET_BUS_INFO), GFP_KERNEL);
 	if (pBusInfo == NULL) {
-		LOGERR("CONTROLVM_BUS_CREATE Failed: bus %lu kmalloc failed",
+		LOGERR("CONTROLVM_BUS_CREATE Failed: bus %lu kzalloc failed",
 		       busNo);
 		POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, busNo,
 				 POSTCODE_SEVERITY_ERR);
 		RETINT(-CONTROLVM_RESP_ERROR_KMALLOC_FAILED);
 	}
 
-	memset(pBusInfo, 0, sizeof(VISORCHIPSET_BUS_INFO));
 	INIT_LIST_HEAD(&pBusInfo->entry);
 	pBusInfo->busNo = busNo;
 	pBusInfo->devNo = cmd->createBus.deviceCount;
@@ -1231,7 +1230,7 @@ my_device_create(CONTROLVM_MESSAGE *inmsg)
 				 POSTCODE_SEVERITY_ERR);
 		RETINT(-CONTROLVM_RESP_ERROR_BUS_INVALID);
 	}
-	pDevInfo = kmalloc(sizeof(VISORCHIPSET_DEVICE_INFO), GFP_KERNEL);
+	pDevInfo = kzalloc(sizeof(VISORCHIPSET_DEVICE_INFO), GFP_KERNEL);
 	if (pDevInfo == NULL) {
 		LOGERR("CONTROLVM_DEVICE_CREATE Failed: busNo=%lu, devNo=%lu kmaloc failed",
 		     busNo, devNo);
@@ -1239,7 +1238,7 @@ my_device_create(CONTROLVM_MESSAGE *inmsg)
 				 POSTCODE_SEVERITY_ERR);
 		RETINT(-CONTROLVM_RESP_ERROR_KMALLOC_FAILED);
 	}
-	memset(pDevInfo, 0, sizeof(VISORCHIPSET_DEVICE_INFO));
+
 	INIT_LIST_HEAD(&pDevInfo->entry);
 	pDevInfo->busNo = busNo;
 	pDevInfo->devNo = devNo;

drivers/staging/unisys/visorutil/memregion_direct.c

@@ -85,12 +85,12 @@ visor_memregion_create_overlapped(MEMREGION *parent, ulong offset, ulong nbytes)
 		       __func__, offset, nbytes);
 		return NULL;
 	}
-	memregion = kmalloc(sizeof(MEMREGION), GFP_KERNEL|__GFP_NORETRY);
+	memregion = kzalloc(sizeof(MEMREGION), GFP_KERNEL|__GFP_NORETRY);
 	if (memregion == NULL) {
 		ERRDRV("%s allocation failed", __func__);
 		return NULL;
 	}
-	memset(memregion, 0, sizeof(MEMREGION));
+
 	memregion->physaddr = parent->physaddr + offset;
 	memregion->nbytes = nbytes;
 	memregion->mapped = ((u8 *) (parent->mapped)) + offset;