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Commit 90476a20 authored by Linas Vepstas's avatar Linas Vepstas Committed by Jeff Garzik
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Spidernet Memory barrier 



Add memory barrier to make sure that the rest of the
RX descriptor state is flushed to memory before we tell
the hardware that its ready to go.

Signed-off-by: default avatarLinas Vepstas <linas@austin.ibm.com>
Cc: James K Lewis <jklewis@us.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 2c307db7

drivers/net/spider_net.c

+1 −0
Original line number Diff line number Diff line
@@ -419,6 +419,7 @@ spider_net_prepare_rx_descr(struct spider_net_card *card, 
		card->spider_stats.rx_iommu_map_error++;

		descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;

	} else {

		wmb();

		descr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |

					 SPIDER_NET_DMAC_NOINTR_COMPLETE;

	}