diff -urN linux-2.5.75/drivers/block/ioctl.c linux-2.5.75-patched/drivers/block/ioctl.c
--- linux-2.5.75/drivers/block/ioctl.c	2003-07-10 14:04:46.000000000 -0600
+++ linux-2.5.75-patched/drivers/block/ioctl.c	2003-07-12 16:35:27.421331789 -0600
@@ -166,13 +166,11 @@
 			return -EINVAL;
 		if (get_user(n, (int *) arg))
 			return -EFAULT;
-		if (n > PAGE_SIZE || n < 512 || (n & (n - 1)))
-			return -EINVAL;
 		if (bd_claim(bdev, &holder) < 0)
 			return -EBUSY;
-		set_blocksize(bdev, n);
+		ret = set_blocksize(bdev, n);
 		bd_release(bdev);
-		return 0;
+		return ret;
 	case BLKPG:
 		return blkpg_ioctl(bdev, (struct blkpg_ioctl_arg *) arg);
 	case BLKRRPART: