myri10ge: add barrier in myri10ge_send_cmd
Add a barrier() in the usleep() loop in myri10ge_send_cmd().
Without the barrier, some mips machine never notices that the
firmware has DMA'ed the response.
Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Andrew Gallatin <gallatin@myri.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index 4a65e41..48fe624 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -361,8 +361,10 @@
for (sleep_total = 0;
sleep_total < 1000
&& response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
- sleep_total += 10)
+ sleep_total += 10) {
udelay(10);
+ mb();
+ }
} else {
/* use msleep for most command */
for (sleep_total = 0;
