diff options
| -rw-r--r-- | drivers/dahdi/voicebus/voicebus.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/dahdi/voicebus/voicebus.c b/drivers/dahdi/voicebus/voicebus.c index 2e4385e..0faa8f7 100644 --- a/drivers/dahdi/voicebus/voicebus.c +++ b/drivers/dahdi/voicebus/voicebus.c @@ -1486,12 +1486,19 @@ static void vb_tasklet_normal(unsigned long data) if (unlikely(softunderrun)) { int i; - vb_increase_latency(vb, behind, &buffers); + unsigned long flags; + /* Disable interrupts on the local processor. We don't want + * the following process interrupted. We're 'racing' against + * the hardware here.... */ + local_irq_save(flags); + vb_increase_latency(vb, behind, &buffers); d = vb_descriptor(dl, dl->head); while (!OWNED(d)) { - if (d->buffer1 != vb->idle_vbb_dma_addr) + if (d->buffer1 != vb->idle_vbb_dma_addr) { + local_irq_restore(flags); goto tx_error_exit; + } SET_OWNED(d); dl->head = (dl->head + 1) & DRING_MASK; d = vb_descriptor(dl, dl->head); @@ -1506,6 +1513,7 @@ static void vb_tasklet_normal(unsigned long data) dl->head = (dl->head + 1) & DRING_MASK; } dl->tail = dl->head; + local_irq_restore(flags); } d = vb_descriptor(dl, dl->tail); |