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[net-next,11/16] s2io: Don't receive packets when the napi budget == 0

Message ID 87bnx8xobx.fsf_-_@xmission.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Eric W. Biederman March 15, 2014, 1:06 a.m. UTC
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>
---
 drivers/net/ethernet/neterion/s2io.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
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Patch

diff --git a/drivers/net/ethernet/neterion/s2io.c b/drivers/net/ethernet/neterion/s2io.c
index 56e3a9d42bb2..d44fdb91808e 100644
--- a/drivers/net/ethernet/neterion/s2io.c
+++ b/drivers/net/ethernet/neterion/s2io.c
@@ -2914,6 +2914,9 @@  static int rx_intr_handler(struct ring_info *ring_data, int budget)
 	struct RxD1 *rxdp1;
 	struct RxD3 *rxdp3;
 
+	if (budget <= 0)
+		return napi_pkts;
+
 	get_info = ring_data->rx_curr_get_info;
 	get_block = get_info.block_index;
 	memcpy(&put_info, &ring_data->rx_curr_put_info, sizeof(put_info));