diff --git a/block/fops.c b/block/fops.c
index e406aa605327..6197d1c41652 100644
--- a/block/fops.c
+++ b/block/fops.c
@@ -685,6 +685,16 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start,
 	return error;
 }
 
+static int blkdev_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct inode *bd_inode = bdev_file_inode(file);
+
+	if (bdev_read_only(I_BDEV(bd_inode)))
+		return generic_file_readonly_mmap(file, vma);
+
+	return generic_file_mmap(file, vma);
+}
+
 const struct file_operations def_blk_fops = {
 	.open		= blkdev_open,
 	.release	= blkdev_close,
@@ -692,7 +702,7 @@ const struct file_operations def_blk_fops = {
 	.read_iter	= blkdev_read_iter,
 	.write_iter	= blkdev_write_iter,
 	.iopoll		= iocb_bio_iopoll,
-	.mmap		= generic_file_mmap,
+	.mmap		= blkdev_mmap,
 	.fsync		= blkdev_fsync,
 	.unlocked_ioctl	= blkdev_ioctl,
 #ifdef CONFIG_COMPAT