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Fix em(4) interrupt routing

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When configured with more tx queues than rx queues,
em_if_msix_intr_assign() was incorrectly routing the tx event
interrupts.

Reviewed by:	erj, marius
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D19070
This commit is contained in:
Patrick Kelsey 2019-02-08 20:34:47 +00:00
parent efed7c6db7
commit d533db848c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=343919
1 changed files with 3 additions and 3 deletions
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6
sys/dev/e1000/if_em.c
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@ -1996,7 +1996,7 @@ em_if_msix_intr_assign(if_ctx_t ctx, int msix)
&adapter->rx_queues[i % adapter->rx_num_queues].que_irq,
IFLIB_INTR_TX, tx_que, tx_que->me, buf);
tx_que->msix = (vector % adapter->tx_num_queues);
tx_que->msix = (vector % adapter->rx_num_queues);
/*
* Set the bit to enable interrupt
@ -2009,9 +2009,9 @@ em_if_msix_intr_assign(if_ctx_t ctx, int msix)
adapter->ims |= tx_que->eims;
adapter->ivars |= (8 | tx_que->msix) << (8 + (i * 4));
} else if (adapter->hw.mac.type == e1000_82575) {
tx_que->eims = E1000_EICR_TX_QUEUE0 << (i % adapter->tx_num_queues);
tx_que->eims = E1000_EICR_TX_QUEUE0 << i;
} else {
tx_que->eims = 1 << (i % adapter->tx_num_queues);
tx_que->eims = 1 << i;
}
}