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authorLinas Vepstas <linas@austin.ibm.com>2007-06-11 13:29:03 -0500
committerJeff Garzik <jeff@garzik.org>2007-06-20 19:09:33 -0400
commit128c6e2e519fe7d0a15de04f3dde00700145cec4 (patch)
tree09b85b9e6aef25ac912e533452d3c2fcf34eb832
parentc3d1182a538fd99b6fe5effa1ab54521c0efb1d1 (diff)
downloadblackbird-op-linux-128c6e2e519fe7d0a15de04f3dde00700145cec4.tar.gz
blackbird-op-linux-128c6e2e519fe7d0a15de04f3dde00700145cec4.zip
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 <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
-rw-r--r--drivers/net/spider_net.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/spider_net.h b/drivers/net/spider_net.h
index f457bce00e5c..1d054aa71504 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) )
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