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ether82563: fix mistake (missing buffer alignment)

--- a/sys/src/9/pc/ether82563.c

+++ b/sys/src/9/pc/ether82563.c

@@ -886,6 +886,7 @@

 		}

 		i++;

 		bp = allocb(ctlr->rbsz + Rbalign);

+		bp->rp = bp->wp = (uchar*)ROUND((uintptr)bp->base, Rbalign);

 		ctlr->rb[rdt] = bp;

 		rd->addr[0] = PCIWADDR(bp->rp);

 		rd->addr[1] = 0;

-- 

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