[PATCH] raw/ifpga: avoid potential integer overflow

[Wei Huang]

Expression "tx_chunks * ctx->dma_buf_size" in dma_fpga_to_fpga()
is evaluated using 32-bit arithmetic, which would overflow
 potentially. Change tx_chunks to type "uint64_t" to avoid such
issue.

Coverity issue: 379203
Fixes: 7d63899a5c19 ("raw/ifpga: add N3000 AFU driver")

Signed-off-by: Wei Huang <wei.huang at intel.com>
---
 drivers/raw/ifpga/afu_pmd_n3000.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/raw/ifpga/afu_pmd_n3000.c b/drivers/raw/ifpga/afu_pmd_n3000.c
index 8708164..5120df5 100644
--- a/drivers/raw/ifpga/afu_pmd_n3000.c
+++ b/drivers/raw/ifpga/afu_pmd_n3000.c
@@ -1158,7 +1158,7 @@ static int dma_fpga_to_fpga(struct dma_afu_ctx *ctx, uint64_t dst, uint64_t src,
 	uint64_t count_left = count;
 	uint64_t dma_chunks = 0;
 	uint64_t offset = 0;
-	uint32_t tx_chunks = 0;
+	uint64_t tx_chunks = 0;
 	uint64_t *tmp_buf = NULL;
 	int ret = 0;
 
@@ -1213,7 +1213,7 @@ static int dma_fpga_to_fpga(struct dma_afu_ctx *ctx, uint64_t dst, uint64_t src,
 		offset = tx_chunks * ctx->dma_buf_size;
 		count_left -= offset;
 		IFPGA_RAWDEV_PMD_DEBUG("0x%"PRIx64" --> 0x%"PRIx64
-			" (%u...0x%"PRIx64")",
+			" (%"PRIu64"...0x%"PRIx64")",
 			src, dst, tx_chunks, count_left);
 		tmp_buf = (uint64_t *)rte_malloc(NULL, ctx->dma_buf_size,
 			DMA_ALIGN_BYTES);
-- 
1.8.3.1