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@xxxxxx>
---
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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