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| author | Aleksander Jan Bajkowski <olek2@wp.pl> | 2021-06-08 23:21:07 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-23 14:41:24 +0200 |
| commit | cc4c6b19093ca213a04c4b5305b5bff9791be9a1 (patch) | |
| tree | 84c6b43a69ae7152f952c68ba231bbbebe187606 /net/unix/af_unix.c | |
| parent | 2038cd15eacdf7512755c27686822e0052eb9042 (diff) | |
net: lantiq: disable interrupt before sheduling NAPI
[ Upstream commit f2386cf7c5f4ff5d7b584f5d92014edd7df6c676 ]
This patch fixes TX hangs with threaded NAPI enabled. The scheduled
NAPI seems to be executed in parallel with the interrupt on second
thread. Sometimes it happens that ltq_dma_disable_irq() is executed
after xrx200_tx_housekeeping(). The symptom is that TX interrupts
are disabled in the DMA controller. As a result, the TX hangs after
a few seconds of the iperf test. Scheduling NAPI after disabling
interrupts fixes this issue.
Tested on Lantiq xRX200 (BT Home Hub 5A).
Fixes: 9423361da523 ("net: lantiq: Disable IRQs only if NAPI gets scheduled ")
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions