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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: Linas Vepstas <linas@austin.ibm.com>
Cc: James K Lewis <jklewis@us.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
hifive-unleashed-5.1
Linas Vepstas 2006-12-13 15:22:04 -06:00 committed by Jeff Garzik
parent 2c307db7e4
commit 90476a20fa
1 changed files with 1 additions and 0 deletions
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drivers/net/spider_net.c
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@ -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;
}