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net: ks8851: Avoid excess softirq scheduling

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commit 22230e68b2 upstream.

The code injects a packet into netif_rx() repeatedly, which will add
it to its internal NAPI and schedule a softirq, and process it. It is
more efficient to queue multiple packets and process them all at the
local_bh_enable() time.

Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Fixes: e0863634bf ("net: ks8851: Queue RX packets in IRQ handler instead of disabling BHs")
Cc: stable@vger.kernel.org
Signed-off-by: Marek Vasut <marex@nabladev.com>
Link: https://patch.msgid.link/20260415231020.455298-2-marex@nabladev.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Marek Vasut
2026-05-17 17:13:30 +02:00
committed by Greg Kroah-Hartman
parent 640a7631d3
commit fa0c4283ef
1 changed files with 4 additions and 1 deletions
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drivers/net/ethernet/micrel/ks8851_common.c
+4 -1
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@@ -389,9 +389,12 @@ static irqreturn_t ks8851_irq(int irq, void *_ks)
if (status & IRQ_LCI)
mii_check_link(&ks->mii);
if (status & IRQ_RXI)
if (status & IRQ_RXI) {
local_bh_disable();
while ((skb = __skb_dequeue(&rxq)))
netif_rx(skb);
local_bh_enable();
}
return IRQ_HANDLED;
}