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i40e: Don't receive packets when the napi budget == 0 

Processing any incoming packets with a with a napi budget of 0
is incorrect driver behavior.

This matters as netpoll will shortly call drivers with a budget of 0
to avoid receive packet processing happening in hard irq context.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2014-03-14 17:59:10 -07:00 committed by David S. Miller
parent b3529744b4
commit 390f86dfbd
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/intel/i40e/i40e_txrx.c
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@ -1302,6 +1302,9 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
u8 rx_ptype; u8 rx_ptype;
u64 qword; u64 qword;
if (budget <= 0)
return 0;
rx_desc = I40E_RX_DESC(rx_ring, i); rx_desc = I40E_RX_DESC(rx_ring, i);
qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len); qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len);
rx_status = (qword & I40E_RXD_QW1_STATUS_MASK) >> rx_status = (qword & I40E_RXD_QW1_STATUS_MASK) >>