[PATCH] ethernet/broadcom: Convert timers to use timer_setup()

[Kees Cook]

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
helper to pass the timer pointer explicitly.

Cc: Florian Fainelli <f.faine...@gmail.com>
Cc: bcm-kernel-feedback-l...@broadcom.com
Cc: "David S. Miller" <da...@davemloft.net>
Cc: Arnd Bergmann <a...@arndb.de>
Cc: Jarod Wilson <ja...@redhat.com>
Cc: netdev@vger.kernel.org
Cc: linux-arm-ker...@lists.infradead.org
Cc: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Kees Cook <keesc...@chromium.org>
---
This requires commit 686fef928bba ("timer: Prepare to change timer
callback argument type") in v4.14-rc3, but should be otherwise
stand-alone.
---
 drivers/net/ethernet/broadcom/bcm63xx_enet.c | 27 +++++++++------------------
 1 file changed, 9 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c 
b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index 4f3845a58126..99c2270d4677 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -295,16 +295,13 @@ static int bcm_enet_refill_rx(struct net_device *dev)
 /*
  * timer callback to defer refill rx queue in case we're OOM
  */
-static void bcm_enet_refill_rx_timer(unsigned long data)
+static void bcm_enet_refill_rx_timer(struct timer_list *t)
 {
-       struct net_device *dev;
-       struct bcm_enet_priv *priv;
-
-       dev = (struct net_device *)data;
-       priv = netdev_priv(dev);
+       struct bcm_enet_priv *priv = from_timer(priv, t, rx_timeout);
+       struct net_device *dev = priv->net_dev;
 
        spin_lock(&priv->rx_lock);
-       bcm_enet_refill_rx((struct net_device *)data);
+       bcm_enet_refill_rx(dev);
        spin_unlock(&priv->rx_lock);
 }
 
@@ -1857,9 +1854,7 @@ static int bcm_enet_probe(struct platform_device *pdev)
        spin_lock_init(&priv->rx_lock);
 
        /* init rx timeout (used for oom) */
-       init_timer(&priv->rx_timeout);
-       priv->rx_timeout.function = bcm_enet_refill_rx_timer;
-       priv->rx_timeout.data = (unsigned long)dev;
+       timer_setup(&priv->rx_timeout, bcm_enet_refill_rx_timer, 0);
 
        /* init the mib update lock&work */
        mutex_init(&priv->mib_update_lock);
@@ -2021,9 +2016,9 @@ static inline int bcm_enet_port_is_rgmii(int portid)
 /*
  * enet sw PHY polling
  */
-static void swphy_poll_timer(unsigned long data)
+static void swphy_poll_timer(struct timer_list *t)
 {
-       struct bcm_enet_priv *priv = (struct bcm_enet_priv *)data;
+       struct bcm_enet_priv *priv = from_timer(priv, t, swphy_poll);
        unsigned int i;
 
        for (i = 0; i < priv->num_ports; i++) {
@@ -2332,9 +2327,7 @@ static int bcm_enetsw_open(struct net_device *dev)
        }
 
        /* start phy polling timer */
-       init_timer(&priv->swphy_poll);
-       priv->swphy_poll.function = swphy_poll_timer;
-       priv->swphy_poll.data = (unsigned long)priv;
+       timer_setup(&priv->swphy_poll, swphy_poll_timer, 0);
        priv->swphy_poll.expires = jiffies;
        add_timer(&priv->swphy_poll);
        return 0;
@@ -2759,9 +2752,7 @@ static int bcm_enetsw_probe(struct platform_device *pdev)
        spin_lock_init(&priv->rx_lock);
 
        /* init rx timeout (used for oom) */
-       init_timer(&priv->rx_timeout);
-       priv->rx_timeout.function = bcm_enet_refill_rx_timer;
-       priv->rx_timeout.data = (unsigned long)dev;
+       timer_setup(&priv->rx_timeout, bcm_enet_refill_rx_timer, 0);
 
        /* register netdevice */
        dev->netdev_ops = &bcm_enetsw_ops;
-- 
2.7.4


-- 
Kees Cook
Pixel Security