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sfc: Correct efx_for_each_possible_channel_tx_queue() to skip non-TX channels

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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 <bhutchings@solarflare.com>
This commit is contained in:
Ben Hutchings 2012-02-23 00:45:50 +00:00
parent 2d0cc56da3
commit 73e0026fb2
1 changed files with 6 additions and 3 deletions
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3
drivers/net/ethernet/sfc/net_driver.h
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@ -1030,6 +1030,9 @@ static inline bool efx_tx_queue_used(struct efx_tx_queue *tx_queue)
/* Iterate over all possible TX queues belonging to a channel */ /* Iterate over all possible TX queues belonging to a channel */
#define efx_for_each_possible_channel_tx_queue(_tx_queue, _channel) \ #define efx_for_each_possible_channel_tx_queue(_tx_queue, _channel) \
if (!efx_channel_has_tx_queues(_channel)) \
; \
else \
for (_tx_queue = (_channel)->tx_queue; \ for (_tx_queue = (_channel)->tx_queue; \
_tx_queue < (_channel)->tx_queue + EFX_TXQ_TYPES; \ _tx_queue < (_channel)->tx_queue + EFX_TXQ_TYPES; \
_tx_queue++) _tx_queue++)