Commit 2dd5bed5 authored by Clemens Ladisch's avatar Clemens Ladisch Committed by Stefan Richter

firewire: ohci: optimize iso context checks in the interrupt handler

When the isochRx/isochTx bit is clear, we do not need to read the
corresponding iso interrupt event register.
Signed-off-by: default avatarClemens Ladisch <clemens@ladisch.de>
Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent 5b06db16
......@@ -1813,23 +1813,29 @@ static irqreturn_t irq_handler(int irq, void *data)
if (event & OHCI1394_respTxComplete)
tasklet_schedule(&ohci->at_response_ctx.tasklet);
if (event & OHCI1394_isochRx) {
iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear);
reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event);
while (iso_event) {
i = ffs(iso_event) - 1;
tasklet_schedule(&ohci->ir_context_list[i].context.tasklet);
tasklet_schedule(
&ohci->ir_context_list[i].context.tasklet);
iso_event &= ~(1 << i);
}
}
if (event & OHCI1394_isochTx) {
iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear);
reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event);
while (iso_event) {
i = ffs(iso_event) - 1;
tasklet_schedule(&ohci->it_context_list[i].context.tasklet);
tasklet_schedule(
&ohci->it_context_list[i].context.tasklet);
iso_event &= ~(1 << i);
}
}
if (unlikely(event & OHCI1394_regAccessFail))
fw_error("Register access failure - "
......
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