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-rw-r--r--mm/backing-dev.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index f2e574dbc300..801c08b046e6 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -176,6 +176,9 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent,
 	int ret = 0;
 	struct device *dev;
 
+	if (bdi->dev)	/* The driver needs to use separate queues per device */
+		goto exit;
+
 	va_start(args, fmt);
 	dev = device_create_vargs(bdi_class, parent, MKDEV(0, 0), bdi, fmt, args);
 	va_end(args);