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[dpdk-dev,3/5] vmxnet3: Avoid segfault caused by vmxnet3_dev_rx_queue_setup.

Message ID 1483612983-3545-3-git-send-email-nic@opencloud.tech (mailing list archive)
State Superseded, archived
Headers

Checks

Context Check Description
ci/checkpatch warning coding style issues
ci/Intel compilation success Compilation OK

Commit Message

nickcooper-zhangtonghao Jan. 5, 2017, 10:43 a.m. UTC 
  We should allocate RX ring for max possible mumber of hardware
descriptors. If we config RX queue with 2048 RX queue size,
and 4096 soon, there will be segment fault when calling other
ethernet API (e.g. rte_eth_dev_start).

Signed-off-by: nickcooper-zhangtonghao <nic@opencloud.tech>
---
 drivers/net/vmxnet3/vmxnet3_rxtx.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index e83ac05..9822fa0 100644
--- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
+++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
@@ -977,8 +977,11 @@ 
 	comp_ring->next2proc = 0;
 	comp_ring->gen = VMXNET3_INIT_GEN;
 
-	size = sizeof(struct Vmxnet3_RxDesc) * (ring0->size + ring1->size);
-	size += sizeof(struct Vmxnet3_RxCompDesc) * comp_ring->size;
+    /* Allocate RX ring for max possible mumber of hardware descriptors. */
+	size = sizeof(struct Vmxnet3_RxDesc) *
+        (VMXNET3_RX_RING_MAX_SIZE * VMXNET3_RX_CMDRING_SIZE);
+	size += sizeof(struct Vmxnet3_RxCompDesc) *
+        (VMXNET3_RX_RING_MAX_SIZE * VMXNET3_RX_CMDRING_SIZE);
 
 	mz = ring_dma_zone_reserve(dev, "rxdesc", queue_idx, size, socket_id);
 	if (mz == NULL) {