netdev - Re: [PATCH] drivers/net: sis: Convert timers to use timer

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Date:   Tue, 24 Oct 2017 12:37:57 +0200
From:   Daniele Venzano <venza@...wnhat.org>
To:     Kees Cook <keescook@...omium.org>,
        "David S. Miller" <davem@...emloft.net>
CC:     Francois Romieu <romieu@...zoreil.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/net: sis: Convert timers to use timer_setup()



On 24 October 2017 10:46:52 CEST, Kees Cook <keescook@...omium.org> wrote:
>In preparation for unconditionally passing the struct timer_list
>pointer to
>all timer callbacks, switch to using the new timer_setup() and
>from_timer()
>to pass the timer pointer explicitly.
>
>Cc: Francois Romieu <romieu@...zoreil.com>
>Cc: Daniele Venzano <venza@...wnhat.org>
>Cc: netdev@...r.kernel.org
>Signed-off-by: Kees Cook <keescook@...omium.org>

Signed-off-by: Daniele Venzano <venza@...wnhat.org>


>---
> drivers/net/ethernet/sis/sis190.c | 10 ++++------
> drivers/net/ethernet/sis/sis900.c | 10 +++++-----
> 2 files changed, 9 insertions(+), 11 deletions(-)
>
>diff --git a/drivers/net/ethernet/sis/sis190.c
>b/drivers/net/ethernet/sis/sis190.c
>index 445109bd6910..c2c50522b96d 100644
>--- a/drivers/net/ethernet/sis/sis190.c
>+++ b/drivers/net/ethernet/sis/sis190.c
>@@ -1018,10 +1018,10 @@ static void sis190_phy_task(struct work_struct
>*work)
> 	rtnl_unlock();
> }
> 
>-static void sis190_phy_timer(unsigned long __opaque)
>+static void sis190_phy_timer(struct timer_list *t)
> {
>-	struct net_device *dev = (struct net_device *)__opaque;
>-	struct sis190_private *tp = netdev_priv(dev);
>+	struct sis190_private *tp = from_timer(tp, t, timer);
>+	struct net_device *dev = tp->dev;
> 
> 	if (likely(netif_running(dev)))
> 		schedule_work(&tp->phy_task);
>@@ -1039,10 +1039,8 @@ static inline void sis190_request_timer(struct
>net_device *dev)
> 	struct sis190_private *tp = netdev_priv(dev);
> 	struct timer_list *timer = &tp->timer;
> 
>-	init_timer(timer);
>+	timer_setup(timer, sis190_phy_timer, 0);
> 	timer->expires = jiffies + SIS190_PHY_TIMEOUT;
>-	timer->data = (unsigned long)dev;
>-	timer->function = sis190_phy_timer;
> 	add_timer(timer);
> }
> 
>diff --git a/drivers/net/ethernet/sis/sis900.c
>b/drivers/net/ethernet/sis/sis900.c
>index cb61247b0526..4bb89f74742c 100644
>--- a/drivers/net/ethernet/sis/sis900.c
>+++ b/drivers/net/ethernet/sis/sis900.c
>@@ -218,7 +218,7 @@ static void sis900_init_rxfilter (struct net_device
>* net_dev);
> static u16 read_eeprom(void __iomem *ioaddr, int location);
>static int mdio_read(struct net_device *net_dev, int phy_id, int
>location);
>static void mdio_write(struct net_device *net_dev, int phy_id, int
>location, int val);
>-static void sis900_timer(unsigned long data);
>+static void sis900_timer(struct timer_list *t);
>static void sis900_check_mode (struct net_device *net_dev, struct
>mii_phy *mii_phy);
> static void sis900_tx_timeout(struct net_device *net_dev);
> static void sis900_init_tx_ring(struct net_device *net_dev);
>@@ -1065,7 +1065,7 @@ sis900_open(struct net_device *net_dev)
> 
> 	/* Set the timer to switch to check for link beat and perhaps switch
> 	   to an alternate media type. */
>-	setup_timer(&sis_priv->timer, sis900_timer, (unsigned long)net_dev);
>+	timer_setup(&sis_priv->timer, sis900_timer, 0);
> 	sis_priv->timer.expires = jiffies + HZ;
> 	add_timer(&sis_priv->timer);
> 
>@@ -1300,10 +1300,10 @@ static void sis630_set_eq(struct net_device
>*net_dev, u8 revision)
>  *	link status (ON/OFF) and link mode (10/100/Full/Half)
>  */
> 
>-static void sis900_timer(unsigned long data)
>+static void sis900_timer(struct timer_list *t)
> {
>-	struct net_device *net_dev = (struct net_device *)data;
>-	struct sis900_private *sis_priv = netdev_priv(net_dev);
>+	struct sis900_private *sis_priv = from_timer(sis_priv, t, timer);
>+	struct net_device *net_dev = sis_priv->mii_info.dev;
> 	struct mii_phy *mii_phy = sis_priv->mii;
> 	static const int next_tick = 5*HZ;
> 	int speed = 0, duplex = 0;