Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=eb2a021c4710b98081daa797d5a729ac23c240cd
Commit: eb2a021c4710b98081daa797d5a729ac23c240cd
Parent: 1ca949299260aa49eeba34ff912e2321c8b1f647
Author: Francois Romieu <[EMAIL PROTECTED]>
AuthorDate: Thu Feb 15 23:37:21 2007 +0100
Committer: Jeff Garzik <[EMAIL PROTECTED]>
CommitDate: Tue Feb 20 11:18:12 2007 -0500
r8169: RTNL and flush_scheduled_work deadlock
flush_scheduled_work() in net_device->close has a slight tendency
to deadlock with tasks on the workqueue that hold RTNL.
rtl8169_close/down simply need the recovery tasks to not meddle
with the hardware while the device is going down.
Signed-off-by: Francois Romieu <[EMAIL PROTECTED]>
Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
---
drivers/net/r8169.c | 25 ++++++++++++++++++-------
1 files changed, 18 insertions(+), 7 deletions(-)
diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index 5598d86..13cf06e 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -1733,6 +1733,8 @@ rtl8169_remove_one(struct pci_dev *pdev)
assert(dev != NULL);
assert(tp != NULL);
+ flush_scheduled_work();
+
unregister_netdev(dev);
rtl8169_release_board(pdev, dev, tp->mmio_addr);
pci_set_drvdata(pdev, NULL);
@@ -2161,10 +2163,13 @@ static void rtl8169_reinit_task(struct work_struct
*work)
struct net_device *dev = tp->dev;
int ret;
- if (netif_running(dev)) {
- rtl8169_wait_for_quiescence(dev);
- rtl8169_close(dev);
- }
+ rtnl_lock();
+
+ if (!netif_running(dev))
+ goto out_unlock;
+
+ rtl8169_wait_for_quiescence(dev);
+ rtl8169_close(dev);
ret = rtl8169_open(dev);
if (unlikely(ret < 0)) {
@@ -2179,6 +2184,9 @@ static void rtl8169_reinit_task(struct work_struct *work)
}
rtl8169_schedule_work(dev, rtl8169_reinit_task);
}
+
+out_unlock:
+ rtnl_unlock();
}
static void rtl8169_reset_task(struct work_struct *work)
@@ -2187,8 +2195,10 @@ static void rtl8169_reset_task(struct work_struct *work)
container_of(work, struct rtl8169_private, task.work);
struct net_device *dev = tp->dev;
+ rtnl_lock();
+
if (!netif_running(dev))
- return;
+ goto out_unlock;
rtl8169_wait_for_quiescence(dev);
@@ -2210,6 +2220,9 @@ static void rtl8169_reset_task(struct work_struct *work)
}
rtl8169_schedule_work(dev, rtl8169_reset_task);
}
+
+out_unlock:
+ rtnl_unlock();
}
static void rtl8169_tx_timeout(struct net_device *dev)
@@ -2722,8 +2735,6 @@ static void rtl8169_down(struct net_device *dev)
netif_stop_queue(dev);
- flush_scheduled_work();
-
core_down:
spin_lock_irq(&tp->lock);
-
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