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net/i40e: fix check of flow director programming status

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In i40e FDIR PMD code for checking programming status
function i40e_check_fdir_programming_status(), the initial value
of return value ret should be set to -1 not 0, because if DD bit of
I40E_RX_DESC_STATUS_DD is not write back, this function will return
0 to upper function, this give an error info to upper function, the
fact for this is it is time out for DD write back and it should return
-1.

Fixes: 05999aab4c ("i40e: add or delete flow director")
Cc: stable@dpdk.org

Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
This commit is contained in:
Wei Zhao 2018-07-13 11:16:33 +08:00 committed by Ferruh Yigit
parent 9214ee18ee
commit 7546dc4a13
1 changed files with 2 additions and 0 deletions
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drivers/net/i40e/i40e_fdir.c
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@ -1360,6 +1360,8 @@ i40e_check_fdir_programming_status(struct i40e_rx_queue *rxq)
I40E_PCI_REG_WRITE(rxq->qrx_tail, rxq->nb_rx_desc - 1);
else
I40E_PCI_REG_WRITE(rxq->qrx_tail, rxq->rx_tail - 1);
} else {
ret = -1;
}
return ret;