[PATCH v4 11/19] common/idpf: remove use of VLAs for Windows built code

[Andre Muezerie <andremue@linux.microsoft.com>]

From: Tyler Retzlaff <roretzla@linux.microsoft.com>

MSVC does not support VLAs, replace VLAs with standard C arrays
or alloca(). alloca() is available for all toolchain/platform
combinations officially supported by DPDK.

Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
---
 drivers/common/idpf/idpf_common_rxtx.c        | 2 +-
 drivers/common/idpf/idpf_common_rxtx_avx512.c | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/common/idpf/idpf_common_rxtx.c b/drivers/common/idpf/idpf_common_rxtx.c
index a04e54ce26..e04ab40fa2 100644
--- a/drivers/common/idpf/idpf_common_rxtx.c
+++ b/drivers/common/idpf/idpf_common_rxtx.c
@@ -569,7 +569,7 @@ idpf_split_rx_bufq_refill(struct idpf_rx_queue *rx_bufq)
 	uint16_t nb_refill = rx_bufq->rx_free_thresh;
 	uint16_t nb_desc = rx_bufq->nb_rx_desc;
 	uint16_t next_avail = rx_bufq->rx_tail;
-	struct rte_mbuf *nmb[rx_bufq->rx_free_thresh];
+	struct rte_mbuf **nmb = alloca(sizeof(struct rte_mbuf *) * rx_bufq->rx_free_thresh);
 	uint64_t dma_addr;
 	uint16_t delta;
 	int i;
diff --git a/drivers/common/idpf/idpf_common_rxtx_avx512.c b/drivers/common/idpf/idpf_common_rxtx_avx512.c
index b8450b03ae..63e10c542f 100644
--- a/drivers/common/idpf/idpf_common_rxtx_avx512.c
+++ b/drivers/common/idpf/idpf_common_rxtx_avx512.c
@@ -1002,7 +1002,8 @@ idpf_tx_singleq_free_bufs_avx512(struct idpf_tx_queue *txq)
 	uint32_t n;
 	uint32_t i;
 	int nb_free = 0;
-	struct rte_mbuf *m, *free[txq->rs_thresh];
+	struct rte_mbuf *m;
+	struct rte_mbuf **free = alloca(sizeof(struct rte_mbuf *) * txq->rs_thresh);
 
 	/* check DD bits on threshold descriptor */
 	if ((txq->tx_ring[txq->next_dd].qw1 &
@@ -1326,7 +1327,8 @@ idpf_tx_splitq_free_bufs_avx512(struct idpf_tx_queue *txq)
 	uint32_t n;
 	uint32_t i;
 	int nb_free = 0;
-	struct rte_mbuf *m, *free[txq->rs_thresh];
+	struct rte_mbuf *m;
+	struct rte_mbuf **free = alloca(sizeof(struct rte_mbuf *) * txq->rs_thresh);
 
 	n = txq->rs_thresh;
 
-- 
2.34.1