From: Linas Vepstas Date: Mon, 11 Jun 2007 18:29:03 +0000 (-0500) Subject: spidernet: turn off descriptor chain end interrupt. X-Git-Tag: v2.6.22-rc6~64 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=128c6e2e519fe7d0a15de04f3dde00700145cec4;p=linux-2.6-omap-h63xx.git spidernet: turn off descriptor chain end interrupt. At some point, the transmit descriptor chain end interrupt (TXDCEINT) was turned on. This is a mistake; and it damages small packet transmit performance, as it results in a huge storm of interrupts. Turn it off. Signed-off-by: Linas Vepstas Signed-off-by: Jeff Garzik --- diff --git a/drivers/net/spider_net.h b/drivers/net/spider_net.h index f457bce00e5..1d054aa7150 100644 --- a/drivers/net/spider_net.h +++ b/drivers/net/spider_net.h @@ -222,6 +222,7 @@ extern char spider_net_driver_name[]; #define SPIDER_NET_GDTBSTA 0x00000300 #define SPIDER_NET_GDTDCEIDIS 0x00000002 #define SPIDER_NET_DMA_TX_VALUE SPIDER_NET_TX_DMA_EN | \ + SPIDER_NET_GDTDCEIDIS | \ SPIDER_NET_GDTBSTA #define SPIDER_NET_DMA_TX_FEND_VALUE 0x00030003 @@ -332,8 +333,7 @@ enum spider_net_int2_status { SPIDER_NET_GRISPDNGINT }; -#define SPIDER_NET_TXINT ( (1 << SPIDER_NET_GDTFDCINT) | \ - (1 << SPIDER_NET_GDTDCEINT) ) +#define SPIDER_NET_TXINT (1 << SPIDER_NET_GDTFDCINT) /* We rely on flagged descriptor interrupts */ #define SPIDER_NET_RXINT ( (1 << SPIDER_NET_GDAFDCINT) )