[PATCH v3 10/12] dma: edma: Check if MAX_NR_SG is even in prep function

From: Joel Fernandes
Date: Mon Aug 05 2013 - 12:16:05 EST

Splitting of MAX available slots into 2 sets of size MAX_NR_LS
requires to the MAX_NR_SG function to be even. We ensure the same
in prep function.

Signed-off-by: Joel Fernandes <joelf@xxxxxx>
drivers/dma/edma.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 70923a2..061f0cf 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -354,6 +354,9 @@ static struct dma_async_tx_descriptor *edma_prep_slave_sg(
int src_bidx, dst_bidx, src_cidx, dst_cidx;
int i, num_slots_needed;

+ if (MAX_NR_SG & 1)
+ dev_err(dev, "%s: MAX_NR_SG must be even\n", __func__);
if (unlikely(!echan || !sgl || !sg_len))
return NULL;


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