ieee1394: ohci1394: don't schedule IT tasklets on IR events

Bug noted by Pieter Palmers:  Isochronous transmit tasklets were
scheduled on isochronous receive events, in addition to the proper
isochronous receive tasklets.

http://marc.info/?l=linux1394-devel&m=119783196222802

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

diff --git a/drivers/ieee1394/ohci1394.c b/drivers/ieee1394/ohci1394.c
index 372c5c1..969de2a 100644 (file)
--- a/drivers/ieee1394/ohci1394.c
+++ b/drivers/ieee1394/ohci1394.c
@@ -2126,10 +2126,14 @@ static void ohci_schedule_iso_tasklets(struct ti_ohci *ohci,
        list_for_each_entry(t, &ohci->iso_tasklet_list, link) {
                mask = 1 << t->context;
 
-               if (t->type == OHCI_ISO_TRANSMIT && tx_event & mask)
-                       tasklet_schedule(&t->tasklet);
-               else if (rx_event & mask)
-                       tasklet_schedule(&t->tasklet);
+               if (t->type == OHCI_ISO_TRANSMIT) {
+                       if (tx_event & mask)
+                               tasklet_schedule(&t->tasklet);
+               } else {
+                       /* OHCI_ISO_RECEIVE or OHCI_ISO_MULTICHANNEL_RECEIVE */
+                       if (rx_event & mask)
+                               tasklet_schedule(&t->tasklet);
+               }
        }
 
        spin_unlock_irqrestore(&ohci->iso_tasklet_list_lock, flags);