From: Antoine Tenart <antoine.ten...@free-electrons.com> Date: Mon, 23 Oct 2017 15:24:31 +0200
> 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.ten...@free-electrons.com> Applied.