On 2024/10/18 20:23, Maciej Fijalkowski wrote:
> On Fri, Oct 18, 2024 at 10:37:34AM +0800, Yue Haibing wrote:
>> ixgbevf_run_xdp() converts customed xdp action to a negative error code
>> with the sk_buff pointer type which be checked with IS_ERR in
>> ixgbevf_clean_rx_irq(). Remove this error pointer handing instead use
>> plain int return value.
>>
>> Fixes: c7aec59657b6 ("ixgbevf: Add XDP support for pass and drop actions")
>> Signed-off-by: Yue Haibing <yuehaib...@huawei.com>
>> ---
>>  .../net/ethernet/intel/ixgbevf/ixgbevf_main.c | 23 ++++++++-----------
>>  1 file changed, 10 insertions(+), 13 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c 
>> b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
>> index 149911e3002a..183d2305d058 100644
>> --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
>> +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
>> @@ -732,10 +732,6 @@ static bool ixgbevf_cleanup_headers(struct ixgbevf_ring 
>> *rx_ring,
>>                                  union ixgbe_adv_rx_desc *rx_desc,
>>                                  struct sk_buff *skb)
>>  {
>> -    /* XDP packets use error pointer so abort at this point */
>> -    if (IS_ERR(skb))
>> -            return true;
>> -
>>      /* verify that the packet does not have any known errors */
>>      if (unlikely(ixgbevf_test_staterr(rx_desc,
>>                                        IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) {
>> @@ -1044,9 +1040,9 @@ static int ixgbevf_xmit_xdp_ring(struct ixgbevf_ring 
>> *ring,
>>      return IXGBEVF_XDP_TX;
>>  }
>>  
>> -static struct sk_buff *ixgbevf_run_xdp(struct ixgbevf_adapter *adapter,
>> -                                   struct ixgbevf_ring  *rx_ring,
>> -                                   struct xdp_buff *xdp)
>> +static int ixgbevf_run_xdp(struct ixgbevf_adapter *adapter,
>> +                       struct ixgbevf_ring *rx_ring,
>> +                       struct xdp_buff *xdp)
> 
> ditto
yuehaibing@localhost:~/code/net$ ./scripts/checkpatch.pl 
0004-ixgbevf-Fix-passing-0-to-ERR_PTR-in-ixgbevf_run_xdp.patch
total: 0 errors, 0 warnings, 0 checks, 67 lines checked

0004-ixgbevf-Fix-passing-0-to-ERR_PTR-in-ixgbevf_run_xdp.patch has no obvious 
style problems and is ready for submission.

> 
>>  {
>>      int result = IXGBEVF_XDP_PASS;
>>      struct ixgbevf_ring *xdp_ring;
>> @@ -1080,7 +1076,7 @@ static struct sk_buff *ixgbevf_run_xdp(struct 
>> ixgbevf_adapter *adapter,
>>              break;
>>      }
>>  xdp_out:
>> -    return ERR_PTR(-result);
>> +    return result;
>>  }
>>  
>>  static unsigned int ixgbevf_rx_frame_truesize(struct ixgbevf_ring *rx_ring,
>> @@ -1122,6 +1118,7 @@ static int ixgbevf_clean_rx_irq(struct 
>> ixgbevf_q_vector *q_vector,
>>      struct sk_buff *skb = rx_ring->skb;
>>      bool xdp_xmit = false;
>>      struct xdp_buff xdp;
>> +    int xdp_res;
>>  
>>      /* Frame size depend on rx_ring setup when PAGE_SIZE=4K */
>>  #if (PAGE_SIZE < 8192)
>> @@ -1165,11 +1162,11 @@ static int ixgbevf_clean_rx_irq(struct 
>> ixgbevf_q_vector *q_vector,
>>                      /* At larger PAGE_SIZE, frame_sz depend on len size */
>>                      xdp.frame_sz = ixgbevf_rx_frame_truesize(rx_ring, size);
>>  #endif
>> -                    skb = ixgbevf_run_xdp(adapter, rx_ring, &xdp);
>> +                    xdp_res = ixgbevf_run_xdp(adapter, rx_ring, &xdp);
>>              }
>>  
>> -            if (IS_ERR(skb)) {
>> -                    if (PTR_ERR(skb) == -IXGBEVF_XDP_TX) {
>> +            if (xdp_res) {
>> +                    if (xdp_res == IXGBEVF_XDP_TX) {
>>                              xdp_xmit = true;
>>                              ixgbevf_rx_buffer_flip(rx_ring, rx_buffer,
>>                                                     size);
>> @@ -1189,7 +1186,7 @@ static int ixgbevf_clean_rx_irq(struct 
>> ixgbevf_q_vector *q_vector,
>>              }
>>  
>>              /* exit if we failed to retrieve a buffer */
>> -            if (!skb) {
>> +            if (!xdp_res && !skb) {
>>                      rx_ring->rx_stats.alloc_rx_buff_failed++;
>>                      rx_buffer->pagecnt_bias++;
>>                      break;
>> @@ -1203,7 +1200,7 @@ static int ixgbevf_clean_rx_irq(struct 
>> ixgbevf_q_vector *q_vector,
>>                      continue;
>>  
>>              /* verify the packet layout is correct */
>> -            if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) {
>> +            if (xdp_res || ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) {
>>                      skb = NULL;
>>                      continue;
>>              }
>> -- 
>> 2.34.1
>>
> 
> .

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