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dma: fix ipu_idmac.c to not discard the last queued buffer

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This also fixes the case of a single queued buffer, for example, when taking a
single frame snapshot with the mx3_camera driver.

Reported-by: Agustin Ferrin Pozuelo <[email protected]>
Tested-by: Agustin Ferrin Pozuelo <[email protected]>
Signed-off-by: Guennadi Liakhovetski <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
This commit is contained in:
Guennadi Liakhovetski 2009-05-12 09:16:29 +02:00 • committed by Dan Williams
commit ad567ffb32
1 changed files with 2 additions and 1 deletions
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3
drivers/dma/ipu/ipu_idmac.c
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@ -1272,7 +1272,8 @@ static irqreturn_t idmac_interrupt(int irq, void *dev_id)
/* Other interrupts do not interfere with this channel */
spin_lock(&ichan->lock);
if (unlikely(chan_id != IDMAC_SDC_0 && chan_id != IDMAC_SDC_1 &&
((curbuf >> chan_id) & 1) == ichan->active_buffer)) {
((curbuf >> chan_id) & 1) == ichan->active_buffer &&
!list_is_last(ichan->queue.next, &ichan->queue))) {
int i = 100;
/* This doesn't help. See comment in ipu_disable_channel() */