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[PATCH] irda_device() oops fix

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Acked-by: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jean Tourrilhes 2005-04-16 15:24:11 -07:00 committed by Linus Torvalds
parent 6775cab98b
commit 7e5c6bc0a6
1 changed files with 9 additions and 2 deletions
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11
net/irda/irda_device.c
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@ -125,8 +125,15 @@ void irda_device_set_media_busy(struct net_device *dev, int status)
self = (struct irlap_cb *) dev->atalk_ptr;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
/* Some drivers may enable the receive interrupt before calling
* irlap_open(), or they may disable the receive interrupt
* after calling irlap_close().
* The IrDA stack is protected from this in irlap_driver_rcv().
* However, the driver calls directly the wrapper, that calls
* us directly. Make sure we protect ourselves.
* Jean II */
if (!self || self->magic != LAP_MAGIC)
return;
if (status) {
self->media_busy = TRUE;