sfc: Correct efx_for_each_possible_channel_tx_queue() to skip non-TX channels
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>
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 @@
/* 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)
{