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ipack/devices/ipoctal: ack IRQ before processing it 

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;
}