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Commit 20f79739 authored by Wei Fang's avatar Wei Fang Committed by Paolo Abeni
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net: fec: recycle pages for transmitted XDP frames



Once the XDP frames have been successfully transmitted through the
ndo_xdp_xmit() interface, it's the driver responsibility to free
the frames so that the page_pool can recycle the pages and reuse
them. However, this action is not implemented in the fec driver.
This leads to a user-visible problem that the console will print
the following warning log.

[  157.568851] page_pool_release_retry() stalled pool shutdown 1389 inflight 60 sec
[  217.983446] page_pool_release_retry() stalled pool shutdown 1389 inflight 120 sec
[  278.399006] page_pool_release_retry() stalled pool shutdown 1389 inflight 181 sec
[  338.812885] page_pool_release_retry() stalled pool shutdown 1389 inflight 241 sec
[  399.226946] page_pool_release_retry() stalled pool shutdown 1389 inflight 302 sec

Therefore, to solve this issue, we free XDP frames via xdp_return_frame()
while cleaning the tx BD ring.

Fixes: 6d6b39f1 ("net: fec: add initial XDP support")
Signed-off-by: default avatarWei Fang <wei.fang@nxp.com>
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent be7ecbe7
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