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>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index 09e3a8e63e22..9cd5572457ff 100644
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -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;
 }