linux-kernel - [PATCH 5.10 027/145] e1000e: Only run S0ix flows if shutdown succeeded

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Date:   Mon, 11 Jan 2021 14:00:51 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Alexander Duyck <alexander.duyck@...il.com>,
        Mario Limonciello <mario.limonciello@...l.com>,
        Yijun Shen <Yijun.shen@...l.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>
Subject: [PATCH 5.10 027/145] e1000e: Only run S0ix flows if shutdown succeeded

From: Mario Limonciello <mario.limonciello@...l.com>

[ Upstream commit 808e0d8832cc81738f3e8df12dff0688352baf50 ]

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>
Reviewed-by: Alexander Duyck <alexander.duyck@...il.com>
Signed-off-by: Mario Limonciello <mario.limonciello@...l.com>
Tested-by: Yijun Shen <Yijun.shen@...l.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/intel/e1000e/netdev.c |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

--- 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_susp
 	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;
 }