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Commit ea192aa8 authored by Guo-Fu Tseng's avatar Guo-Fu Tseng Committed by David S. Miller
Browse files

jme: Prevent possible read re-order error 



Adding read memory barrier in between flag reading and data reading of
receive descriptors. This prevents the data being read before hardware
complete writing informations.

Reported-by: default avatarStefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: default avatarGuo-Fu Tseng <cooldavid@cooldavid.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3ee94018

drivers/net/jme.c

+1 −0
Original line number Diff line number Diff line
@@ -989,6 +989,7 @@ jme_process_receive(struct jme_adapter *jme, int limit) 
			goto out;

		--limit;



		rmb();

		desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;



		if (unlikely(desccnt > 1 ||