From: Stephen Hemminger <shemminger@osdl.org>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: netdev@vger.kernel.org
Subject: [PATCH] sky2: netpoll on dual port cards
Date: Wed, 18 Oct 2006 13:39:28 -0700 [thread overview]
Message-ID: <20061018133928.60052617@freekitty> (raw)
The sky2 driver uses a single NAPI poll routine for both ports on dual ported
cards (because there is a single IRQ and status ring). Netpoll makes assumptions
about the relationship between network device and NAPI that aren't correct
on the second port, this will cause the port to never clear work.
Most systems, just have single port, so not a big issue.
The easy fix is just make the second port, not netpoll capable.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
--- sky2.orig/drivers/net/sky2.c 2006-10-18 13:25:22.000000000 -0700
+++ sky2/drivers/net/sky2.c 2006-10-18 13:27:06.000000000 -0700
@@ -3255,7 +3255,11 @@
dev->poll = sky2_poll;
dev->weight = NAPI_WEIGHT;
#ifdef CONFIG_NET_POLL_CONTROLLER
- dev->poll_controller = sky2_netpoll;
+ /* Network console (only works on port 0)
+ * because netpoll makes assumptions about NAPI
+ */
+ if (port == 0)
+ dev->poll_controller = sky2_netpoll;
#endif
sky2 = netdev_priv(dev);
next reply other threads:[~2006-10-18 20:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-18 20:39 Stephen Hemminger [this message]
2006-11-01 1:19 ` [PATCH] sky2: netpoll on dual port cards Jeff Garzik
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