netdev - [PATCH net 2/2] sfc: Increase MCDI status timeout to 250ms

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Message-ID: <1379785646.1681.23.camel@bwh-desktop.uk.level5networks.com>
Date:	Sat, 21 Sep 2013 18:47:26 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	David Miller <davem@...emloft.net>
CC:	<netdev@...r.kernel.org>, <linux-net-drivers@...arflare.com>
Subject: [PATCH net 2/2] sfc: Increase MCDI status timeout to 250ms

From: Daniel Pieczko <dpieczko@...arflare.com>

The SFC9120 MC firmware often takes longer than 20ms to reboot and
update the warm boot count in BIU_MC_SFT_STATUS_REG.  A timeout of
250ms is very generous for an MC reboot.

Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
---
 drivers/net/ethernet/sfc/mcdi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/sfc/mcdi.c b/drivers/net/ethernet/sfc/mcdi.c
index 73143ec..c082562 100644
--- a/drivers/net/ethernet/sfc/mcdi.c
+++ b/drivers/net/ethernet/sfc/mcdi.c
@@ -27,10 +27,10 @@
 
 /* A reboot/assertion causes the MCDI status word to be set after the
  * command word is set or a REBOOT event is sent. If we notice a reboot
- * via these mechanisms then wait 20ms for the status word to be set.
+ * via these mechanisms then wait 250ms for the status word to be set.
  */
 #define MCDI_STATUS_DELAY_US		100
-#define MCDI_STATUS_DELAY_COUNT		200
+#define MCDI_STATUS_DELAY_COUNT		2500
 #define MCDI_STATUS_SLEEP_MS						\
 	(MCDI_STATUS_DELAY_US * MCDI_STATUS_DELAY_COUNT / 1000)
 

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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