From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 E40C92D023; Mon, 10 Mar 2025 17:55:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741629302; cv=none; b=h32IwkDIB7T7SwwNXFPwk2M/9rMghTMVOf8BF1tdDFQfHBv524plkoyUrELmN/Qi6CZSoIBegmawwG0gTbcKOUV5pYqUQfOPoJ9ZBuHn/DDP5G4ITYECb70140y6HvKKGSiTJwQW7yJuWA89n/U/pb4HY6tZCPuYlYXybdVuOp0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741629302; c=relaxed/simple; bh=Tr6TOysNNrze2Kvwm2IWimsi0AbqRoU7N8L5uF/w93A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=G9KbWHpzw2X02jlZ7kmotMisfUiBODQsvwvOOJ/3NLab7LGDJbQvu8ZkvAfejN1InVBI3w/ikmdN1eBljK0VbV4kh1i1FaMhuWF6u6J8I0ehnw7ag2If+IOHVZUOxn/wSEhAj70cXmIPmyVrR7NaK7IHXKLavy2qbyj3z9r/8RI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UC34VZTs; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="UC34VZTs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6634BC4CEE5; Mon, 10 Mar 2025 17:55:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1741629301; bh=Tr6TOysNNrze2Kvwm2IWimsi0AbqRoU7N8L5uF/w93A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UC34VZTsa00yApFM0VW3WlTo7MLvFoIujoYrLGn6iy4wI7dJriAjNDN4bJlzscABk 5ahoR/+YYR5Hp91M1LLSrT1q0NfjYC7uPe7irosZgwVh2SPzHMvxBMLcpGjOQjviCo lwKdAt8B6Cd7BBwOx+vT65DPS5s3FS8IzR33MhSg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jacob Moroni , Igor Russkikh , Simon Horman , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.15 246/620] net: atlantic: fix warning during hot unplug Date: Mon, 10 Mar 2025 18:01:32 +0100 Message-ID: <20250310170555.340909249@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250310170545.553361750@linuxfoundation.org> References: <20250310170545.553361750@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org 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: Jacob Moroni [ Upstream commit 028676bb189ed6d1b550a0fc570a9d695b6acfd3 ] Firmware deinitialization performs MMIO accesses which are not necessary if the device has already been removed. In some cases, these accesses happen via readx_poll_timeout_atomic which ends up timing out, resulting in a warning at hw_atl2_utils_fw.c:112: [ 104.595913] Call Trace: [ 104.595915] [ 104.595918] ? show_regs+0x6c/0x80 [ 104.595923] ? __warn+0x8d/0x150 [ 104.595925] ? aq_a2_fw_deinit+0xcf/0xe0 [atlantic] [ 104.595934] ? report_bug+0x182/0x1b0 [ 104.595938] ? handle_bug+0x6e/0xb0 [ 104.595940] ? exc_invalid_op+0x18/0x80 [ 104.595942] ? asm_exc_invalid_op+0x1b/0x20 [ 104.595944] ? aq_a2_fw_deinit+0xcf/0xe0 [atlantic] [ 104.595952] ? aq_a2_fw_deinit+0xcf/0xe0 [atlantic] [ 104.595959] aq_nic_deinit.part.0+0xbd/0xf0 [atlantic] [ 104.595964] aq_nic_deinit+0x17/0x30 [atlantic] [ 104.595970] aq_ndev_close+0x2b/0x40 [atlantic] [ 104.595975] __dev_close_many+0xad/0x160 [ 104.595978] dev_close_many+0x99/0x170 [ 104.595979] unregister_netdevice_many_notify+0x18b/0xb20 [ 104.595981] ? __call_rcu_common+0xcd/0x700 [ 104.595984] unregister_netdevice_queue+0xc6/0x110 [ 104.595986] unregister_netdev+0x1c/0x30 [ 104.595988] aq_pci_remove+0xb1/0xc0 [atlantic] Fix this by skipping firmware deinitialization altogether if the PCI device is no longer present. Tested with an AQC113 attached via Thunderbolt by performing repeated unplug cycles while traffic was running via iperf. Fixes: 97bde5c4f909 ("net: ethernet: aquantia: Support for NIC-specific code") Signed-off-by: Jacob Moroni Reviewed-by: Igor Russkikh Reviewed-by: Simon Horman Link: https://patch.msgid.link/20250203143604.24930-3-mail@jakemoroni.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c index c52093589d7cf..25349a2ae5cfe 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c @@ -1294,7 +1294,9 @@ void aq_nic_deinit(struct aq_nic_s *self, bool link_down) aq_ptp_ring_free(self); aq_ptp_free(self); - if (likely(self->aq_fw_ops->deinit) && link_down) { + /* May be invoked during hot unplug. */ + if (pci_device_is_present(self->pdev) && + likely(self->aq_fw_ops->deinit) && link_down) { mutex_lock(&self->fwreq_mutex); self->aq_fw_ops->deinit(self->aq_hw); mutex_unlock(&self->fwreq_mutex); -- 2.39.5