From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 278703E40E9; Wed, 30 Sep 2026 18:05:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790791532; cv=none; b=Z0Oah7IZTDLgjdfS3kDY/D7KqfM58ggaHhzHqlObL6a1voH+GpY0ysJ0wCI0ckNm6m2U5jr6gk2IN5K1YqlyxiEsTeZkCjO3KxRgiyD6GUhqhGpONnajmYnuinVEGgYtUzgta8S5OSbP/sg0+04680L1PsX8LSB3uxPi/gTxKjc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790791532; c=relaxed/simple; bh=QhbH945412EhBb9pRTDMRhs8RDlmaHFdcMg5KnPlAek=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=stlMrr+oot1NZz54XT+CwnDeENtzBaJq1tUKFpRMvVDiKgt6o4Ww0GQ256Tsj5H8NgmBxxuypuLIGxtDaPywRT9iYhaCPJoe/iNrsKzOX4l8LSlfeGYVQ0WH9yYYPBaTjV3wRzEDL+FBpMvLkkqGIP977mU2c3ac+33Vr53yquo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ske61P4R; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ske61P4R" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 807F81F000FF; Wed, 30 Sep 2026 18:05:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790791531; bh=CMzHlsn5klIaz5IlWMatXXOp21hPyTcUfY88Bbb6siM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ske61P4RTCESqE1jifIhWDsYRqDPD1z9WF58KOl6/LBrrn47nJ7O2pnB5idSjgDUi HMcH/eqGwFSLrtSoJUOKZlq5SMOZJKmooNtiwIFz8zsUfQtoZREMYOgEcxugUWc8Wy t23QXwMQYEEh8Zqi4syLmfjFTA9RQgTIHdv9SUqo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Joe Damato , Linus Walleij , Paolo Abeni , Sasha Levin Subject: [PATCH 5.15 336/752] net: ethernet: cortina: Fix budget accounting Date: Wed, 30 Sep 2026 17:23:26 +0200 Message-ID: <20260930152405.562495855@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152358.131179731@linuxfoundation.org> References: <20260930152358.131179731@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Linus Walleij [ Upstream commit a0de06d0da78a3db53de65dfd7452cc6d111f703 ] The gmac_rx() function returns the remaining NAPI budget, but its caller treats the return value as the number of packets received. An idle poll therefore reports a full budget and remains scheduled. Return the number of received packets instead. Preserve the existing free queue refill accounting by adding that count directly; continuing to subtract it from the budget would invert the refill behavior. Fixes: 4d5ae32f5e1e ("net: ethernet: Add a driver for Gemini gigabit ethernet") Link: https://lore.kernel.org/r/20260509-gemini-ethernet-fixes-v1-4-6c5d20ddc35b@kernel.org Link: https://lore.kernel.org/r/20260512131456.189452-1-pabeni@redhat.com Assisted-by: LLM Reviewed-by: Joe Damato Signed-off-by: Linus Walleij Link: https://patch.msgid.link/20260903-gemini-ethernet-fixes-v2-1-2bbbd598ca6e@kernel.org Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- drivers/net/ethernet/cortina/gemini.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/cortina/gemini.c b/drivers/net/ethernet/cortina/gemini.c index 8cc3cca1f4bd4..5a09061ce8976 100644 --- a/drivers/net/ethernet/cortina/gemini.c +++ b/drivers/net/ethernet/cortina/gemini.c @@ -1419,6 +1419,7 @@ static unsigned int gmac_rx(struct net_device *netdev, unsigned int budget) unsigned int frame_len, frag_len; struct gmac_rxdesc *rx = NULL; struct gmac_queue_page *gpage; + unsigned int received = 0; union gmac_rxdesc_0 word0; union gmac_rxdesc_1 word1; union gmac_rxdesc_3 word3; @@ -1514,7 +1515,8 @@ static unsigned int gmac_rx(struct net_device *netdev, unsigned int budget) napi_gro_frags(&port->napi); skb = NULL; frag_nr = 0; - --budget; + budget--; + received++; } continue; @@ -1534,7 +1536,7 @@ static unsigned int gmac_rx(struct net_device *netdev, unsigned int budget) port->rx_skb = skb; port->rx_frag_nr = frag_nr; writew(r, ptr_reg); - return budget; + return received; } static int gmac_napi_poll(struct napi_struct *napi, int budget) @@ -1555,7 +1557,7 @@ static int gmac_napi_poll(struct napi_struct *napi, int budget) ++port->rx_napi_exits; } - port->freeq_refill += (budget - received); + port->freeq_refill += received; if (port->freeq_refill > freeq_threshold) { port->freeq_refill -= freeq_threshold; geth_fill_freeq(geth, true); -- 2.53.0