net: stmmac: xgmac: do not treat TBU as a TX event

Commit 8d07a7930434 ("net: stmmac: xgmac: Do not enable TBU interrupt")
removed TBUE from the default DMA interrupt mask, but did not remove the
TBU check from dwxgmac2_dma_interrupt().

TBU is set whenever a TX channel runs out of descriptors. Since TBUE is
not enabled and only enabled bits are cleared, the TBU status bit is
never cleared. As a result, TBU stays set on every idle TX channel,
regardless of whether there is any TX traffic.

With a shared interrupt, stmmac_dma_interrupt() checks all channels,
so every interrupt from any source schedules TX NAPI on every idle TX
channel.

Only use TI to trigger TX processing.

Fixes: 8d07a7930434 ("net: stmmac: xgmac: Do not enable TBU interrupt")
Signed-off-by: Pengfei Zhang <zhangfeionline@gmail.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20261013024747.2688984-1-zhangfeionline@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

0 files changed, 0 insertions, 0 deletions