From ba5eec9c55ec4be99d21a6ea614003b65d7f37d7 Mon Sep 17 00:00:00 2001
From: Francois Romieu <romieu@fr.zoreil.com>
Date: Tue, 8 Nov 2005 23:37:12 +0100
Subject: [PATCH] [PATCH] b44: race on device closing
Usual fix:
- b44_interrupt() does not schedule NAPI polling when the device is
going down;
- b44_close() waits for any scheduled NAPI polling before it starts
to release the private structures of the device.
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
---
drivers/net/b44.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/net/b44.c b/drivers/net/b44.c
index f1675dcf4d5c..e829beea668c 100644
--- a/drivers/net/b44.c
+++ b/drivers/net/b44.c
@@ -909,6 +909,12 @@ static irqreturn_t b44_interrupt(int irq, void *dev_id, struct pt_regs *regs)
istat &= imask;
if (istat) {
handled = 1;
+
+ if (unlikely(!netif_running(dev))) {
+ printk(KERN_INFO "%s: late interrupt.\n", dev->name);
+ goto irq_ack;
+ }
+
if (netif_rx_schedule_prep(dev)) {
/* NOTE: These writes are posted by the readback of
* the ISTAT register below.
@@ -921,6 +927,7 @@ static irqreturn_t b44_interrupt(int irq, void *dev_id, struct pt_regs *regs)
dev->name);
}
+irq_ack:
bw32(bp, B44_ISTAT, istat);
br32(bp, B44_ISTAT);
}
@@ -1446,6 +1453,8 @@ static int b44_close(struct net_device *dev)
netif_stop_queue(dev);
+ netif_poll_disable(dev);
+
del_timer_sync(&bp->timer);
spin_lock_irq(&bp->lock);
@@ -1461,6 +1470,8 @@ static int b44_close(struct net_device *dev)
free_irq(dev->irq, dev);
+ netif_poll_enable(dev);
+
b44_free_consistent(bp);
return 0;
--
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