[PATCH] drivers/net: realtek: Convert timers to use timer_setup()

From: Kees Cook
Date: Wed Oct 25 2017 - 06:53:21 EST


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: Realtek linux nic maintainers <nic_swsd@xxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Jay Vosburgh <jay.vosburgh@xxxxxxxxxxxxx>
Cc: Allen Pais <allen.lkml@xxxxxxxxx>
Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
Cc: Tobias Klauser <tklauser@xxxxxxxxxx>
Cc: netdev@xxxxxxxxxxxxxxx
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
---
drivers/net/ethernet/realtek/atp.c | 12 +++++++-----
drivers/net/ethernet/realtek/r8169.c | 7 +++----
2 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/realtek/atp.c b/drivers/net/ethernet/realtek/atp.c
index bdc3833fab7e..7e011c1c1e6e 100644
--- a/drivers/net/ethernet/realtek/atp.c
+++ b/drivers/net/ethernet/realtek/atp.c
@@ -170,6 +170,7 @@ struct net_local {
spinlock_t lock;
struct net_device *next_module;
struct timer_list timer; /* Media selection timer. */
+ struct net_device *dev; /* Timer dev. */
unsigned long last_rx_time; /* Last Rx, in jiffies, to handle Rx hang. */
int saved_tx_size;
unsigned int tx_unit_busy:1;
@@ -184,7 +185,7 @@ struct net_local {
#define TIMED_CHECKER (HZ/4)
#ifdef TIMED_CHECKER
#include <linux/timer.h>
-static void atp_timed_checker(unsigned long ignored);
+static void atp_timed_checker(struct timer_list *t);
#endif

/* Index to functions, as function prototypes. */
@@ -438,7 +439,8 @@ static int net_open(struct net_device *dev)

hardware_init(dev);

- setup_timer(&lp->timer, atp_timed_checker, (unsigned long)dev);
+ lp->dev = dev;
+ timer_setup(&lp->timer, atp_timed_checker, 0);
lp->timer.expires = jiffies + TIMED_CHECKER;
add_timer(&lp->timer);

@@ -708,11 +710,11 @@ static irqreturn_t atp_interrupt(int irq, void *dev_instance)
#ifdef TIMED_CHECKER
/* This following code fixes a rare (and very difficult to track down)
problem where the adapter forgets its ethernet address. */
-static void atp_timed_checker(unsigned long data)
+static void atp_timed_checker(struct timer_list *t)
{
- struct net_device *dev = (struct net_device *)data;
+ struct net_local *lp = from_timer(lp, t, timer);
+ struct net_device *dev = lp->dev;
long ioaddr = dev->base_addr;
- struct net_local *lp = netdev_priv(dev);
int tickssofar = jiffies - lp->last_rx_time;
int i;

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index a3c949ea7d1a..7dc4b6de31e6 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -4401,10 +4401,9 @@ static void rtl_schedule_task(struct rtl8169_private *tp, enum rtl_flag flag)
schedule_work(&tp->wk.work);
}

-static void rtl8169_phy_timer(unsigned long __opaque)
+static void rtl8169_phy_timer(struct timer_list *t)
{
- struct net_device *dev = (struct net_device *)__opaque;
- struct rtl8169_private *tp = netdev_priv(dev);
+ struct rtl8169_private *tp = from_timer(tp, t, timer);

rtl_schedule_task(tp, RTL_FLAG_TASK_PHY_PENDING);
}
@@ -8454,7 +8453,7 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
tp->opts1_mask = (tp->mac_version != RTL_GIGA_MAC_VER_01) ?
~(RxBOVF | RxFOVF) : ~0;

- setup_timer(&tp->timer, rtl8169_phy_timer, (unsigned long)dev);
+ timer_setup(&tp->timer, rtl8169_phy_timer, 0);

tp->rtl_fw = RTL_FIRMWARE_UNKNOWN;

--
2.7.4


--
Kees Cook
Pixel Security