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mISDN: Fix wrong usage of flush_work_sync while holding locks

Telusuri Sumber 
It is a bad idea to hold a spinlock and call flush_work_sync.
Move the workqueue cleanup outside the spinlock and use cancel_work_sync,
on closing the channel this seems to be the more correct function.
Remove the never used and constant return value of mISDN_freebchannel.

Signed-off-by: Karsten Keil <keil@b1-systems.de>
Cc: <stable@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Karsten Keil
2012-09-13 04:36:20 +00:00
committed by David S. Miller
orang tua 930521695c
melakukan 4b921eda53
7 mengubah file dengan 15 tambahan dan 11 penghapusan
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9
drivers/isdn/mISDN/hwchannel.c
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@@ -148,17 +148,16 @@ mISDN_clear_bchannel(struct bchannel *ch)
ch->next_minlen = ch->init_minlen;
ch->maxlen = ch->init_maxlen;
ch->next_maxlen = ch->init_maxlen;
skb_queue_purge(&ch->rqueue);
ch->rcount = 0;
}
EXPORT_SYMBOL(mISDN_clear_bchannel);
int
void
mISDN_freebchannel(struct bchannel *ch)
{
cancel_work_sync(&ch->workq);
mISDN_clear_bchannel(ch);
skb_queue_purge(&ch->rqueue);
ch->rcount = 0;
flush_work_sync(&ch->workq);
return 0;
}
EXPORT_SYMBOL(mISDN_freebchannel);