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Subject[PATCH net-next]atl1c:use common_task instead of reset_task and link_chg_task
Date
From: Jie Yang <jie.yang@atheros.com>

use common_task instead of reset_task and link_chg_task, so it fix "call cancel_work_sync
from the work itself".

Signed-off-by: Jie Yang <jie.yang@atheros.com>
---

drivers/net/atl1c/atl1c.h | 6 ++-
drivers/net/atl1c/atl1c_main.c | 72 ++++++++++++++++++---------------------
2 files changed, 37 insertions(+), 41 deletions(-)

diff --git a/drivers/net/atl1c/atl1c.h b/drivers/net/atl1c/atl1c.h
index a348a22..b020723 100644
--- a/drivers/net/atl1c/atl1c.h
+++ b/drivers/net/atl1c/atl1c.h
@@ -550,6 +550,9 @@ struct atl1c_adapter {
#define __AT_TESTING 0x0001
#define __AT_RESETTING 0x0002
#define __AT_DOWN 0x0003
+ u8 work_event;
+#define ATL1C_WORK_EVENT_RESET 0x01
+#define ATL1C_WORK_EVENT_LINK_CHANGE 0x02
u32 msg_enable;

bool have_msi;
@@ -561,8 +564,7 @@ struct atl1c_adapter {
spinlock_t tx_lock;
atomic_t irq_sem;

- struct work_struct reset_task;
- struct work_struct link_chg_task;
+ struct work_struct common_task;
struct timer_list watchdog_timer;
struct timer_list phy_config_timer;

diff --git a/drivers/net/atl1c/atl1c_main.c b/drivers/net/atl1c/atl1c_main.c
index 1e2f57d..c6c8fe8 100644
--- a/drivers/net/atl1c/atl1c_main.c
+++ b/drivers/net/atl1c/atl1c_main.c
@@ -198,27 +198,12 @@ static void atl1c_phy_config(unsigned long data)

void atl1c_reinit_locked(struct atl1c_adapter *adapter)
{
-
WARN_ON(in_interrupt());
atl1c_down(adapter);
atl1c_up(adapter);
clear_bit(__AT_RESETTING, &adapter->flags);
}

-static void atl1c_reset_task(struct work_struct *work)
-{
- struct atl1c_adapter *adapter;
- struct net_device *netdev;
-
- adapter = container_of(work, struct atl1c_adapter, reset_task);
- netdev = adapter->netdev;
-
- netif_device_detach(netdev);
- atl1c_down(adapter);
- atl1c_up(adapter);
- netif_device_attach(netdev);
-}
-
static void atl1c_check_link_status(struct atl1c_adapter *adapter)
{
struct atl1c_hw *hw = &adapter->hw;
@@ -275,18 +260,6 @@ static void atl1c_check_link_status(struct atl1c_adapter *adapter)
}
}

-/*
- * atl1c_link_chg_task - deal with link change event Out of interrupt context
- * @netdev: network interface device structure
- */
-static void atl1c_link_chg_task(struct work_struct *work)
-{
- struct atl1c_adapter *adapter;
-
- adapter = container_of(work, struct atl1c_adapter, link_chg_task);
- atl1c_check_link_status(adapter);
-}
-
static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
@@ -311,20 +284,40 @@ static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
adapter->link_speed = SPEED_0;
}
}
- schedule_work(&adapter->link_chg_task);
+
+ adapter->work_event |= ATL1C_WORK_EVENT_LINK_CHANGE;
+ schedule_work(&adapter->common_task);
}

-static void atl1c_del_timer(struct atl1c_adapter *adapter)
+static void atl1c_common_task(struct work_struct *work)
{
- del_timer_sync(&adapter->phy_config_timer);
+ struct atl1c_adapter *adapter;
+ struct net_device *netdev;
+
+ adapter = container_of(work, struct atl1c_adapter, common_task);
+ netdev = adapter->netdev;
+
+ if (adapter->work_event & ATL1C_WORK_EVENT_RESET) {
+ netif_device_detach(netdev);
+ atl1c_down(adapter);
+ atl1c_up(adapter);
+ netif_device_attach(netdev);
+ return;
+ }
+
+ if (adapter->work_event & ATL1C_WORK_EVENT_LINK_CHANGE)
+ atl1c_check_link_status(adapter);
+
+ return;
}

-static void atl1c_cancel_work(struct atl1c_adapter *adapter)
+
+static void atl1c_del_timer(struct atl1c_adapter *adapter)
{
- cancel_work_sync(&adapter->reset_task);
- cancel_work_sync(&adapter->link_chg_task);
+ del_timer_sync(&adapter->phy_config_timer);
}

+
/*
* atl1c_tx_timeout - Respond to a Tx Hang
* @netdev: network interface device structure
@@ -334,7 +327,8 @@ static void atl1c_tx_timeout(struct net_device *netdev)
struct atl1c_adapter *adapter = netdev_priv(netdev);

/* Do the reset outside of interrupt context */
- schedule_work(&adapter->reset_task);
+ adapter->work_event |= ATL1C_WORK_EVENT_RESET;
+ schedule_work(&adapter->common_task);
}

/*
@@ -1533,7 +1527,8 @@ static irqreturn_t atl1c_intr(int irq, void *data)
/* reset MAC */
hw->intr_mask &= ~ISR_ERROR;
AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
- schedule_work(&adapter->reset_task);
+ adapter->work_event |= ATL1C_WORK_EVENT_RESET;
+ schedule_work(&adapter->common_task);
break;
}

@@ -2198,8 +2193,7 @@ void atl1c_down(struct atl1c_adapter *adapter)
struct net_device *netdev = adapter->netdev;

atl1c_del_timer(adapter);
- atl1c_cancel_work(adapter);
-
+ adapter->work_event = 0; /* clear all event */
/* signal that we're down so the interrupt handler does not
* reschedule our watchdog timer */
set_bit(__AT_DOWN, &adapter->flags);
@@ -2599,8 +2593,8 @@ static int __devinit atl1c_probe(struct pci_dev *pdev,
adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);

atl1c_hw_set_mac_addr(&adapter->hw);
- INIT_WORK(&adapter->reset_task, atl1c_reset_task);
- INIT_WORK(&adapter->link_chg_task, atl1c_link_chg_task);
+ INIT_WORK(&adapter->common_task, atl1c_common_task);
+ adapter->work_event = 0;
err = register_netdev(netdev);
if (err) {
dev_err(&pdev->dev, "register netdevice failed\n");

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