net: stmmac: Set dma_sync_size to zero for discarded frames

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If a frame is going to be discarded by driver, this frame is never touched
by driver and the cache lines never become dirty obviously,
page_pool_recycle_direct() wastes CPU cycles on unnecessary calling of
page_pool_dma_sync_for_device() to sync entire frame.
page_pool_put_page() with sync_size setting to 0 is the proper method.

Signed-off-by: Furong Xu <0x1207@gmail.com>
Link: https://patch.msgid.link/20250103093733.3872939-1-0x1207@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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Furong Xu 2025-01-03 17:37:33 +08:00 • committed by Paolo Abeni

parent 49afc040f4

commit 51cfbed198

1 changed files with 1 additions and 1 deletions

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drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

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