[PATCH net] ibmvnic: correctly use dev_consume/free_skb_irq

[PATCH net] ibmvnic: correctly use dev_consume/free_skb_irq

[Lijun Pan]

It is more correct to use dev_kfree_skb_irq when packets are dropped,
and to use dev_consume_skb_irq when packets are consumed.

Fixes: 0d973388185d ("ibmvnic: Introduce xmit_more support using batched subCRQ hcalls")
Suggested-by: Thomas Falcon <tlfalcon@linux.ibm.com>
Signed-off-by: Lijun Pan <lijunp213@gmail.com>
---
 drivers/net/ethernet/ibm/ibmvnic.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 9c6438d3b3a5..110a0d0eaabb 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -3204,9 +3204,6 @@ static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
 
 		next = ibmvnic_next_scrq(adapter, scrq);
 		for (i = 0; i < next->tx_comp.num_comps; i++) {
-			if (next->tx_comp.rcs[i])
-				dev_err(dev, "tx error %x\n",
-					next->tx_comp.rcs[i]);
 			index = be32_to_cpu(next->tx_comp.correlators[i]);
 			if (index & IBMVNIC_TSO_POOL_MASK) {
 				tx_pool = &adapter->tso_pool[pool];
@@ -3220,7 +3217,13 @@ static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
 			num_entries += txbuff->num_entries;
 			if (txbuff->skb) {
 				total_bytes += txbuff->skb->len;
-				dev_consume_skb_irq(txbuff->skb);
+				if (next->tx_comp.rcs[i]) {
+					dev_err(dev, "tx error %x\n",
+						next->tx_comp.rcs[i]);
+					dev_kfree_skb_irq(txbuff->skb);
+				} else {
+					dev_consume_skb_irq(txbuff->skb);
+				}
 				txbuff->skb = NULL;
 			} else {
 				netdev_warn(adapter->netdev,
-- 
2.23.0

Re: [PATCH net] ibmvnic: correctly use dev_consume/free_skb_irq

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Tue, 13 Apr 2021 03:33:25 -0500 you wrote:
> It is more correct to use dev_kfree_skb_irq when packets are dropped,
> and to use dev_consume_skb_irq when packets are consumed.
> 
> Fixes: 0d973388185d ("ibmvnic: Introduce xmit_more support using batched subCRQ hcalls")
> Suggested-by: Thomas Falcon <tlfalcon@linux.ibm.com>
> Signed-off-by: Lijun Pan <lijunp213@gmail.com>
> 
> [...]

Here is the summary with links:
  - [net] ibmvnic: correctly use dev_consume/free_skb_irq
    https://git.kernel.org/netdev/net/c/ca09bf7bb109

You are awesome, thank you!
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