Remove NULL checks for bdrv_new return value

It's an indirect call to qemu_malloc, which never returns an error.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>

hw/xen_disk.c

@@ -634,17 +634,12 @@ static int blk_init(struct XenDevice *xendev)
     if (!blkdev->dinfo) {
         /* setup via xenbus -> create new block driver instance */
         xen_be_printf(&blkdev->xendev, 2, "create new bdrv (xenbus setup)\n");
-	blkdev->bs = bdrv_new(blkdev->dev);
-	if (blkdev->bs) {
-	    if (bdrv_open(blkdev->bs, blkdev->filename, qflags,
-                           bdrv_find_whitelisted_format(blkdev->fileproto))
-                != 0) {
-		bdrv_delete(blkdev->bs);
-		blkdev->bs = NULL;
-	    }
-	}
-	if (!blkdev->bs)
-	    return -1;
+        blkdev->bs = bdrv_new(blkdev->dev);
+        if (bdrv_open(blkdev->bs, blkdev->filename, qflags,
+                      bdrv_find_whitelisted_format(blkdev->fileproto)) != 0) {
+            bdrv_delete(blkdev->bs);
+            return -1;
+        }
     } else {
         /* setup via qemu cmdline -> already setup for us */
         xen_be_printf(&blkdev->xendev, 2, "get configured bdrv (cmdline setup)\n");

qemu-img.c

@@ -215,10 +215,7 @@ static BlockDriverState *bdrv_new_open(const char *filename,
     char password[256];
 
     bs = bdrv_new("");
-    if (!bs) {
-        error_report("Not enough memory");
-        goto fail;
-    }
+
     if (fmt) {
         drv = bdrv_find_format(fmt);
         if (!drv) {

qemu-io.c

@@ -1509,8 +1509,6 @@ static int openfile(char *name, int flags, int growable)
 		}
 	} else {
 		bs = bdrv_new("hda");
-		if (!bs)
-			return 1;
 
 		if (bdrv_open(bs, name, flags, NULL) < 0) {
 			fprintf(stderr, "%s: can't open device %s\n", progname, name);

qemu-nbd.c

@@ -336,8 +336,6 @@ int main(int argc, char **argv)
     bdrv_init();
 
     bs = bdrv_new("hda");
-    if (bs == NULL)
-        return 1;
 
     if ((ret = bdrv_open(bs, argv[optind], flags, NULL)) < 0) {
         errno = -ret;