linux-kernel - [PATCH 1/4] e1000e: Only run S0ix flows if shutdown succeeded

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Message-Id: <20201214153450.874339-2-mario.limonciello@dell.com>
Date:   Mon, 14 Dec 2020 09:34:47 -0600
From:   Mario Limonciello <mario.limonciello@...l.com>
To:     Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        intel-wired-lan@...ts.osuosl.org,
        David Miller <davem@...emloft.net>
Cc:     linux-kernel@...r.kernel.org, Netdev <netdev@...r.kernel.org>,
        Alexander Duyck <alexander.duyck@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Sasha Netfin <sasha.neftin@...el.com>,
        Aaron Brown <aaron.f.brown@...el.com>,
        Stefan Assmann <sassmann@...hat.com>, darcari@...hat.com,
        Yijun.Shen@...l.com, Perry.Yuan@...l.com,
        anthony.wong@...onical.com, Hans de Goede <hdegoede@...hat.com>,
        Mario Limonciello <mario.limonciello@...l.com>
Subject: [PATCH 1/4] e1000e: Only run S0ix flows if shutdown succeeded

If the shutdown failed, the part will be thawed and running
S0ix flows will put it into an undefined state.

Reported-by: Alexander Duyck <alexander.duyck@...il.com>
Signed-off-by: Mario Limonciello <mario.limonciello@...l.com>
---
 drivers/net/ethernet/intel/e1000e/netdev.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 128ab6898070..6588f5d4a2be 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -6970,13 +6970,14 @@ static __maybe_unused int e1000e_pm_suspend(struct device *dev)
 	e1000e_pm_freeze(dev);
 
 	rc = __e1000_shutdown(pdev, false);
-	if (rc)
+	if (rc) {
 		e1000e_pm_thaw(dev);
-
-	/* Introduce S0ix implementation */
-	if (hw->mac.type >= e1000_pch_cnp &&
-	    !e1000e_check_me(hw->adapter->pdev->device))
-		e1000e_s0ix_entry_flow(adapter);
+	} else {
+		/* Introduce S0ix implementation */
+		if (hw->mac.type >= e1000_pch_cnp &&
+		    !e1000e_check_me(hw->adapter->pdev->device))
+			e1000e_s0ix_entry_flow(adapter);
+	}
 
 	return rc;
 }
-- 
2.25.1