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[PATCH] Char: isicom, fix locking in isr

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2 spin_unlocks are omitted in the interrupt handler.  Put them there to fix up
deadlocking on UP.

Signed-off-by: Jiri Slaby <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Jiri Slaby 2007-02-10 01:44:52 -08:00 • committed by Linus Torvalds
commit 174f130767
1 changed files with 2 additions and 0 deletions
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2
drivers/char/isicom.c
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@ -564,6 +564,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
port = card->ports + channel;
if (!(port->flags & ASYNC_INITIALIZED)) {
outw(0x0000, base+0x04); /* enable interrupts */
spin_unlock(&card->card_lock);
return IRQ_HANDLED;
}
@ -678,6 +679,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
tty_flip_buffer_push(tty);
}
outw(0x0000, base+0x04); /* enable interrupts */
spin_unlock(&card->card_lock);
return IRQ_HANDLED;
}