linux-kernel - [PATCH 3.16 088/178] net: phy: handle state correctly in phy_stop

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Message-ID: <lsq.1500213406.212966666@decadent.org.uk>
Date:   Sun, 16 Jul 2017 14:56:46 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Florian Fainelli" <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Nathan Sullivan" <nathan.sullivan@...com>,
        "Kyle Roeschley" <kyle.roeschley@...com>,
        "Xander Huff" <xander.huff@...com>,
        "Brad Mouring" <brad.mouring@...com>
Subject: [PATCH 3.16 088/178] net: phy: handle state correctly in
 phy_stop_machine

3.16.46-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Nathan Sullivan <nathan.sullivan@...com>

commit 49d52e8108a21749dc2114b924c907db43358984 upstream.

If the PHY is halted on stop, then do not set the state to PHY_UP.  This
ensures the phy will be restarted later in phy_start when the machine is
started again.

Fixes: 00db8189d984 ("This patch adds a PHY Abstraction Layer to the Linux Kernel, enabling ethernet drivers to remain as ignorant as is reasonable of the connected PHY's design and operation details.")
Signed-off-by: Nathan Sullivan <nathan.sullivan@...com>
Signed-off-by: Brad Mouring <brad.mouring@...com>
Acked-by: Xander Huff <xander.huff@...com>
Acked-by: Kyle Roeschley <kyle.roeschley@...com>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/phy/phy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -474,7 +474,7 @@ void phy_stop_machine(struct phy_device
 	cancel_delayed_work_sync(&phydev->state_queue);
 
 	mutex_lock(&phydev->lock);
-	if (phydev->state > PHY_UP)
+	if (phydev->state > PHY_UP && phydev->state != PHY_HALTED)
 		phydev->state = PHY_UP;
 	mutex_unlock(&phydev->lock);
 }