diff options
| author | Antoine Tenart <antoine.tenart@free-electrons.com> | 2017-10-23 15:24:31 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-24 18:34:10 +0900 |
| commit | 082297e61480c4d72ed75b31077e74aca0e7c799 (patch) | |
| tree | b3c0c88736e2f73dde398930d2418c1c704a1c69 /drivers | |
| parent | 20920267885218fda08dc12c7d3814938ab15b54 (diff) | |
| download | linux-082297e61480c4d72ed75b31077e74aca0e7c799.tar.gz | |
net: mvpp2: do not call txq_done from the Tx path when Tx irqs are used
When Tx IRQs are used, txq_bufs_free() can be called from both the Tx
path and from NAPI poll(). This led to CPU stalls as if these two tasks
(Tx and Poll) are scheduled on two CPUs at the same time, DMA unmapping
operations are done on the same txq buffers.
This patch adds a check not to call txq_done() from the Tx path if Tx
interrupts are used as it does not make sense to do so.
Fixes: edc660fa09e2 ("net: mvpp2: replace TX coalescing interrupts with hrtimer")
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/marvell/mvpp2.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c index 3de05a8c468a..28c6e8a5e118 100644 --- a/drivers/net/ethernet/marvell/mvpp2.c +++ b/drivers/net/ethernet/marvell/mvpp2.c @@ -6499,7 +6499,7 @@ out: } /* Finalize TX processing */ - if (txq_pcpu->count >= txq->done_pkts_coal) + if (!port->has_tx_irqs && txq_pcpu->count >= txq->done_pkts_coal) mvpp2_txq_done(port, txq, txq_pcpu); /* Set the timer in case not all frags were processed */ |