[PATCH net-next 4/8] net: ravb: Always process TX descriptor ring in GbEth poll
From: Paul Barker <hidden>
Date: 2024-01-31 17:06:03
Also in:
linux-renesas-soc, lkml
Subsystem:
networking drivers, renesas ethernet avb driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Niklas Söderlund, Linus Torvalds
The TX queue should be serviced each time the poll function is called, even if the full RX work budget has been consumed. This prevents starvation of the TX queue when RX bandwidth usage is high. Signed-off-by: Paul Barker <redacted> --- drivers/net/ethernet/renesas/ravb_main.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 077c189bcc6f..9b0ed269e69b 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c@@ -1345,8 +1345,6 @@ static int ravb_poll_gbeth(struct napi_struct *napi, int budget) /* Clear RX interrupt */ ravb_write(ndev, ~(mask | RIS0_RESERVED), RIS0); work_done = ravb_rx_gbeth(ndev, budget, q); - if (work_done == budget) - goto out; /* Processing TX Descriptor Ring */ spin_lock_irqsave(&priv->lock, flags);
@@ -1356,6 +1354,9 @@ static int ravb_poll_gbeth(struct napi_struct *napi, int budget) netif_wake_subqueue(ndev, q); spin_unlock_irqrestore(&priv->lock, flags); + if (work_done == budget) + goto out; + napi_complete(napi); /* Re-enable RX/TX interrupts */
--
2.39.2