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dmaengine: edma: Fix paRAM slot allocation for entry channel 0 

edma_alloc_slot was not checking the channel mapping support existence when
slot 0 has been requested (used as entry slot for channel/event 0).

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Peter Ujfalusi 2016-01-11 10:38:01 +02:00 committed by Vinod Koul
parent 8b648436eb
commit d20313b2c4
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/edma.c
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@ -484,7 +484,7 @@ static void edma_read_slot(struct edma_cc *ecc, unsigned slot,
*/ */
static int edma_alloc_slot(struct edma_cc *ecc, int slot) static int edma_alloc_slot(struct edma_cc *ecc, int slot)
{ {
if (slot > 0) { if (slot >= 0) {
slot = EDMA_CHAN_SLOT(slot); slot = EDMA_CHAN_SLOT(slot);
/* Requesting entry paRAM slot for a HW triggered channel. */ /* Requesting entry paRAM slot for a HW triggered channel. */
if (ecc->chmap_exist && slot < ecc->num_channels) if (ecc->chmap_exist && slot < ecc->num_channels)