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| author |   Mattias Barthel <mattias.barthel@atlascopco.com> | 2025-04-29 11:08:26 +0200 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2025-05-01 07:10:00 -0700 |
| commit | a179aad12badc43201cbf45d1e8ed2c1383c76b9 (patch) | |
| tree | 4c7f5cd7876e48e5d85529ec8a7de184aefa8798 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | net: lan743x: Fix memleak issue when GSO enabled (diff) | |
| download | linux-rng-a179aad12badc43201cbf45d1e8ed2c1383c76b9.tar.xz linux-rng-a179aad12badc43201cbf45d1e8ed2c1383c76b9.zip | |
net: fec: ERR007885 Workaround for conventional TX
Activate TX hang workaround also in
fec_enet_txq_submit_skb() when TSO is not enabled.
Errata: ERR007885
Symptoms: NETDEV WATCHDOG: eth0 (fec): transmit queue 0 timed out
commit 37d6017b84f7 ("net: fec: Workaround for imx6sx enet tx hang when enable three queues")
There is a TDAR race condition for mutliQ when the software sets TDAR
and the UDMA clears TDAR simultaneously or in a small window (2-4 cycles).
This will cause the udma_tx and udma_tx_arbiter state machines to hang.
So, the Workaround is checking TDAR status four time, if TDAR cleared by
hardware and then write TDAR, otherwise don't set TDAR.
Fixes: 53bb20d1faba ("net: fec: add variable reg_desc_active to speed things up")
Signed-off-by: Mattias Barthel <mattias.barthel@atlascopco.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250429090826.3101258-1-mattiasbarthel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions