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ipack/devices/ipoctal: ack IRQ before processing it

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Due to the IRQ processing, we can generate another IRQ that can come before we
end the previous one, so we lost it. E.g. when transmitting a character.

To allow the processing in SMP machines, we ack the IRQ at the beginning of the
IRQ handler.

Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Samuel Iglesias Gonsalvez 2012-12-10 11:50:04 +01:00 committed by Greg Kroah-Hartman
parent a3882b7814
commit 21d27ed461
1 changed files with 4 additions and 4 deletions
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8
drivers/ipack/devices/ipoctal.c
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@ -223,14 +223,14 @@ static irqreturn_t ipoctal_irq_handler(void *arg)
unsigned int i;
struct ipoctal *ipoctal = (struct ipoctal *) arg;
/* Check all channels */
for (i = 0; i < NR_CHANNELS; i++)
ipoctal_irq_channel(&ipoctal->channel[i]);
/* Clear the IPack device interrupt */
readw(ipoctal->int_space + ACK_INT_REQ0);
readw(ipoctal->int_space + ACK_INT_REQ1);
/* Check all channels */
for (i = 0; i < NR_CHANNELS; i++)
ipoctal_irq_channel(&ipoctal->channel[i]);
return IRQ_HANDLED;
}