Messages in this thread Patch in this message | | | From | Joel Fernandes <> | Subject | [PATCH v3 08/12] dma: edma: Add one more required slot to MAX slots | Date | Mon, 5 Aug 2013 11:14:53 -0500 |
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We'd now need a separate slot just for the channel and separate ones for the 2 linked sets, so we make adjustments to allocate an extra channel accordingly.
Signed-off-by: Joel Fernandes <joelf@ti.com> --- drivers/dma/edma.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index a242269..df50a04 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -48,7 +48,7 @@ /* Max of 16 segments per channel to conserve PaRAM slots */ #define MAX_NR_SG 16 -#define EDMA_MAX_SLOTS MAX_NR_SG +#define EDMA_MAX_SLOTS (MAX_NR_SG+1) #define EDMA_DESCRIPTORS 16 struct edma_desc { @@ -311,6 +311,9 @@ static struct dma_async_tx_descriptor *edma_prep_slave_sg( num_slots_needed = sg_len > MAX_NR_SG ? MAX_NR_SG : sg_len; + /* Allocate one extra to account for the channel itself */ + num_slots_needed++; + for (i = 0; i < num_slots_needed; i++) { if (echan->slot[i] < 0) { echan->slot[i] = -- 1.7.9.5
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