linux-kernel - [PATCH] i40e: don't enable and init FCOE by default when do PF reset

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Message-Id: <1420821466-5747-1-git-send-email-ethan.zhao@oracle.com>
Date:	Sat, 10 Jan 2015 01:37:46 +0900
From:	Ethan Zhao <ethan.zhao@...cle.com>
To:	jeffrey.t.kirsher@...el.com, jesse.brandeburg@...el.com,
	bruce.w.allan@...el.com, carolyn.wyborny@...el.com,
	donald.c.skidmore@...el.com, gregory.v.rose@...el.com,
	matthew.vick@...el.com, john.ronciak@...el.com,
	mitch.a.williams@...el.com
Cc:	linux.nics@...el.com, e1000-devel@...ts.sourceforge.net,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	ethan.kernel@...il.com, brian.maly@...cle.com,
	Ethan Zhao <ethan.zhao@...cle.com>
Subject: [PATCH] i40e: don't enable and init FCOE by default when do PF reset

While do PF reset with function i40e_reset_and_rebuild(), it will
call i40e_init_pf_fcoe() by default if FCOE is defined, thus if the
PF is resetted, FCOE will be enabled whatever it was - enabled or
not.

Such bug might be hit when PF resumes from suspend, run diagnostic
test with ethtool, setup VLAN etc.

Passed building with v3.19-rc3.

Signed-off-by: Ethan Zhao <ethan.zhao@...cle.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index a5f2660..a2572cc 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -6180,9 +6180,12 @@ static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit)
 	}
 #endif /* CONFIG_I40E_DCB */
 #ifdef I40E_FCOE
-	ret = i40e_init_pf_fcoe(pf);
-	if (ret)
-		dev_info(&pf->pdev->dev, "init_pf_fcoe failed: %d\n", ret);
+	if (pf->flags & I40E_FLAG_FCOE_ENABLED) {
+		ret = i40e_init_pf_fcoe(pf);
+		if (ret)
+			dev_info(&pf->pdev->dev,
+				 "init_pf_fcoe failed: %d\n", ret);
+	}
 
 #endif
 	/* do basic switch setup */
-- 
1.8.3.1

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