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 3636A5208A5; Wed, 30 Sep 2026 17:32:21 +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=1790789543; cv=none; b=H9RFSwKyDnREtQvIL2TmQdULbA3eAMYt5gOeb/kFbBxBmGZ9NEGy+61WjDBD/716tUKZXRvHIxYClbHYU3yNNYSYiPYj0hfnAqPM9fiZM+eAZQiQZN1841JSZd/RAdlunlSnep3WzSjHnfHDIAIxi3cthJqnDOn7lBCiz4GiK24= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790789543; c=relaxed/simple; bh=VOsVsL7PA+/Guai6/4HM6wCUD5wkbYRzM4U3bPWO7mg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=kJJejRLJ7dQ3hm0m2m2x7H/y63dW2NILP/n5ySfxk4zQEWt65Qvo7JcT5F+Q+gobmZEdtEZ4M8tgDBmBqrl2I4USRfZfRLmW7/2bAkZYgoO4egJ505GL25NApTMw8zPTrdcOxy5zF/QmEfRYxUhP8RSlOWHWFgA9W0DznFbD1II= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=vjtbbUSD; 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="vjtbbUSD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5186A1F000FF; Wed, 30 Sep 2026 17:32:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790789541; bh=1Q34Raf5bM0f9UWZMACmQzCwaEbqT9jQoWxGRrplPaw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=vjtbbUSDknRTHIDuGyJ3cYxC6NNkRTVGluh46//83P9JCNUmZ4/hilYzcvN5aY6/k ef/54q186Jqx73IwBYl/aEq1Qd7K9AbudZ9MqBGyYommrIFmf3Dxl/oZrQj10QSsgy W55JFFwQ02wnR2H1TDU7TuAFrFFBlNT8qY42J9T0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Gajdos=20Tam=C3=A1s?= , Paolo Abeni Subject: [PATCH 6.12 514/877] net: atl1e: fix soft lockup on out-of-range hw_next_to_clean read Date: Wed, 30 Sep 2026 17:23:45 +0200 Message-ID: <20260930152425.747828645@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152414.738996857@linuxfoundation.org> References: <20260930152414.738996857@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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Gajdos Tamás commit 374bf9e4b90f979e052332c4faca2d745c491a12 upstream. Same issue as atl1c (see the first commit in this series, "net: atl1c: fix soft lockup on out-of-range tpd_cons read"): the hardware can report an out-of-range hw_next_to_clean (seen as 0xffff) while the PCIe link/MAC is resetting. An out-of-range value can never be reached and the loop below would spin forever. Treat it as "nothing new to clean" instead. Fixes: a6a5325239c202 ("atl1e: Atheros L1E Gigabit Ethernet driver") Cc: stable@vger.kernel.org Signed-off-by: Gajdos Tamás Link: https://patch.msgid.link/20260921091334.3571525-3-tamas@rimpianto.com Signed-off-by: Paolo Abeni Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/atheros/atl1e/atl1e_main.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c +++ b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c @@ -1234,6 +1234,9 @@ static bool atl1e_clean_tx_irq(struct at u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX); u16 next_to_clean = atomic_read(&tx_ring->next_to_clean); + if (unlikely(hw_next_to_clean >= tx_ring->count)) + hw_next_to_clean = next_to_clean; + while (next_to_clean != hw_next_to_clean) { tx_buffer = &tx_ring->tx_buffer[next_to_clean]; if (tx_buffer->dma) {