[PATCH net-next 5/5] sfc: Correct efx_for_each_possible_channel_tx_queue() to skip non-TX channels
From: Ben Hutchings <hidden>
Date: 2012-02-23 17:42:00
Subsystem:
networking drivers, sfc network driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Edward Cree, Linus Torvalds
efx_for_each_possible_channel_tx_queue() should do nothing for RX-only or extra channels. The current definition results in allocating additional unused hardware TX queues when using the mqprio qdisc and either separate_tx_channels or SR-IOV. Signed-off-by: Ben Hutchings <redacted> --- drivers/net/ethernet/sfc/net_driver.h | 9 ++++++--- 1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 3fbec45..0b95505 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h@@ -1030,9 +1030,12 @@ static inline bool efx_tx_queue_used(struct efx_tx_queue *tx_queue) /* Iterate over all possible TX queues belonging to a channel */ #define efx_for_each_possible_channel_tx_queue(_tx_queue, _channel) \ - for (_tx_queue = (_channel)->tx_queue; \ - _tx_queue < (_channel)->tx_queue + EFX_TXQ_TYPES; \ - _tx_queue++) + if (!efx_channel_has_tx_queues(_channel)) \ + ; \ + else \ + for (_tx_queue = (_channel)->tx_queue; \ + _tx_queue < (_channel)->tx_queue + EFX_TXQ_TYPES; \ + _tx_queue++) static inline bool efx_channel_has_rx_queue(struct efx_channel *channel) {
--
1.7.7.6
--
Ben Hutchings, Staff Engineer, Solarflare
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