[PATCH net-next] nfp: clear ring delayed kick counters

[PATCH net-next] nfp: clear ring delayed kick counters

[Jakub Kicinski]

We need to clear delayed kick counters when we free rings otherwise
after ndo_close()/ndo_open() we could kick HW by more entries than
actually written to rings.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Rolf Neugebauer <rolf.neugebauer@netronome.com>
---
 drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 7060539d276a..6c5af4cb5bdc 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -1363,6 +1363,7 @@ static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring)
 	tx_ring->wr_p = 0;
 	tx_ring->rd_p = 0;
 	tx_ring->qcp_rd_p = 0;
+	tx_ring->wr_ptr_add = 0;
 
 	tx_ring->txbufs = NULL;
 	tx_ring->txds = NULL;
@@ -1437,6 +1438,7 @@ static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring)
 	rx_ring->cnt = 0;
 	rx_ring->wr_p = 0;
 	rx_ring->rd_p = 0;
+	rx_ring->wr_ptr_add = 0;
 
 	rx_ring->rxbufs = NULL;
 	rx_ring->rxds = NULL;
-- 
1.9.1

Re: [PATCH net-next] nfp: clear ring delayed kick counters

[David Miller]

From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 16 Dec 2015 19:08:52 +0000

> We need to clear delayed kick counters when we free rings otherwise
> after ndo_close()/ndo_open() we could kick HW by more entries than
> actually written to rings.
> 
> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
> Reviewed-by: Rolf Neugebauer <rolf.neugebauer@netronome.com>

Applied, thank you.