Comment # 3 on bug 73781 from ahmabdabd@hotmail.com

Thanks for your reply.

>From what I understand due to r6xx/r7xx limitation, the blit must be on 8
boundary for copy height greater than 8, this should not be true for copy
heights less than 8. 
I think the fix then should be
cheight = ((0x0000ffff << 2) / pitch) > 0x00000008 ? 
        ((0x0000ffff << 2) / pitch) & 0xfffffff8 : ((0x0000ffff << 2) / pitch);

I will modify the patch and reattach.