linux-kernel - [PATCH 3/3] e1000e: remove failed request for sw/fw/hw flag

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Message-ID: <20080923224630.6927.28967.stgit@jtkirshe-mobile.jf.intel.com>
Date:	Tue, 23 Sep 2008 15:46:38 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	jeff@...zik.org, mingo@...e.hu, davem@...emloft.net
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	jesse.brandeburg@...el.com, john.ronciak@...el.com,
	Bruce Allan <bruce.w.allan@...el.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [PATCH 3/3] e1000e: remove failed request for sw/fw/hw flag

From: Bruce Allan <bruce.w.allan@...el.com>

When the driver fails to acquire the control flag used to serialize
NVM and PHY accesses between the driver, firmware and hardware, remove the
request for the flag otherwise the hardware might grant the flag when it
becomes available but the driver will not release the flag.  This could
cause the firmware to prevent the driver getting the flag for all future
attempts.

Signed-off-by: Bruce Allan <bruce.w.allan@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---

 drivers/net/e1000e/ich8lan.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index f47c60e..6b14ea8 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -409,6 +409,8 @@ static s32 e1000_acquire_swflag_ich8lan(struct e1000_hw *hw)
 
 	if (!timeout) {
 		hw_dbg(hw, "FW or HW has locked the resource for too long.\n");
+		extcnf_ctrl &= ~E1000_EXTCNF_CTRL_SWFLAG;
+		ew32(EXTCNF_CTRL, extcnf_ctrl);
 		return -E1000_ERR_CONFIG;
 	}
 

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