linux-kernel - [PATCH 5.4 04/17] net: phy: marvell: Fix invalid comparison in the resume and suspend functions

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Date:   Mon, 21 Mar 2022 14:52:40 +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, Kurt Cancemi <kurt@...architecture.com>,
        Andrew Lunn <andrew@...n.ch>, Jakub Kicinski <kuba@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 04/17] net: phy: marvell: Fix invalid comparison in the resume and suspend functions

From: Kurt Cancemi <kurt@...architecture.com>

[ Upstream commit 837d9e49402eaf030db55a49f96fc51d73b4b441 ]

This bug resulted in only the current mode being resumed and suspended when
the PHY supported both fiber and copper modes and when the PHY only supported
copper mode the fiber mode would incorrectly be attempted to be resumed and
suspended.

Fixes: 3758be3dc162 ("Marvell phy: add functions to suspend and resume both interfaces: fiber and copper links.")
Signed-off-by: Kurt Cancemi <kurt@...architecture.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
Link: https://lore.kernel.org/r/20220312201512.326047-1-kurt@x64architecture.com
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/phy/marvell.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index 53420c531266..49801c2eb627 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -1408,8 +1408,8 @@ static int marvell_suspend(struct phy_device *phydev)
 	int err;
 
 	/* Suspend the fiber mode first */
-	if (!linkmode_test_bit(ETHTOOL_LINK_MODE_FIBRE_BIT,
-			       phydev->supported)) {
+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_FIBRE_BIT,
+			      phydev->supported)) {
 		err = marvell_set_page(phydev, MII_MARVELL_FIBER_PAGE);
 		if (err < 0)
 			goto error;
@@ -1443,8 +1443,8 @@ static int marvell_resume(struct phy_device *phydev)
 	int err;
 
 	/* Resume the fiber mode first */
-	if (!linkmode_test_bit(ETHTOOL_LINK_MODE_FIBRE_BIT,
-			       phydev->supported)) {
+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_FIBRE_BIT,
+			      phydev->supported)) {
 		err = marvell_set_page(phydev, MII_MARVELL_FIBER_PAGE);
 		if (err < 0)
 			goto error;
-- 
2.34.1