netdev - [PATCH] sfc: Recover from RX queue flush failure

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Message-ID: <20080609183431.GL11300@solarflare.com>
Date:	Mon, 9 Jun 2008 19:34:32 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Jeff Garzik <jgarzik@...ox.com>
Cc:	netdev@...r.kernel.org, linux-net-drivers@...arflare.com
Subject: [PATCH] sfc: Recover from RX queue flush failure

From: Steve Hodgson <shodgson@...arflare.com>

RX queue flush can fail if traffic continues to arrive.  Recover by
performing an invisible reset.

Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
---
 drivers/net/sfc/falcon.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index cbe2e83..f2d361f 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -842,8 +842,10 @@ void falcon_fini_rx(struct efx_rx_queue *rx_queue)
 			continue;
 		break;
 	}
-	if (rc)
+	if (rc) {
 		EFX_ERR(efx, "failed to flush rx queue %d\n", rx_queue->queue);
+		efx_schedule_reset(efx, RESET_TYPE_INVISIBLE);
+	}
 
 	/* Remove RX descriptor ring from card */
 	EFX_ZERO_OWORD(rx_desc_ptr);

-- 
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
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