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(1-171-197-52.dynamic-ip.hinet.net [1.171.197.52]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-canonical-1.canonical.com (Postfix) with ESMTPSA id 0BC483F4C2; Thu, 25 Aug 2022 06:39:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1661409545; bh=XfNld7B+q9+PTSF5LGqeEIE7E9ua29nFSz2ie2o+XHg=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=HpKIYhqdqyTnRCikckXz7AuL5TcSZrPwFnT/KWVwuxwWglJS6vHePuS5pS6tbHs+Y PtAVKS61YzAR+MuQmUlyiYo0B85DKmi8DJZbDLicT6DCo1fY1vocA7V8iqJs4f0o01 Tj6tlTI0oSYCKpr7VJhgu//wFaZTiiQyZeNZvobj6RnImiB9yZOOnalR2Lq8TShemw R0af82mVHCb0lZK08LVjPT5mqXj16+1pjEoFrY2EDLgQuQhTkbDdLainAPv5KYlhpR n0LRE6v07GpuM0Ah9MLhWV9A8ioYZgBBUOU5V0K9iZI2REeompWiIpqobQPOxgySjy tBJsXpJDqVqmA== From: Kai-Heng Feng To: siva.kallam@broadcom.com, prashant@broadcom.com, mchan@broadcom.com Cc: Kai-Heng Feng , Josef Bacik , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] tg3: Disable tg3 device on system reboot to avoid triggering AER Date: Thu, 25 Aug 2022 14:38:52 +0800 Message-Id: <20220825063852.1120632-1-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.36.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Commit d60cd06331a3 ("PM: ACPI: reboot: Use S5 for reboot") caused a reboot hang on one Dell servers so the commit was reverted. Someone managed to collect the AER log and it's caused by MSI: [ 148.762067] ACPI: Preparing to enter system sleep state S5 [ 148.794638] {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 5 [ 148.803731] {1}[Hardware Error]: event severity: recoverable [ 148.810191] {1}[Hardware Error]: Error 0, type: fatal [ 148.816088] {1}[Hardware Error]: section_type: PCIe error [ 148.822391] {1}[Hardware Error]: port_type: 0, PCIe end point [ 148.829026] {1}[Hardware Error]: version: 3.0 [ 148.834266] {1}[Hardware Error]: command: 0x0006, status: 0x0010 [ 148.841140] {1}[Hardware Error]: device_id: 0000:04:00.0 [ 148.847309] {1}[Hardware Error]: slot: 0 [ 148.852077] {1}[Hardware Error]: secondary_bus: 0x00 [ 148.857876] {1}[Hardware Error]: vendor_id: 0x14e4, device_id: 0x165f [ 148.865145] {1}[Hardware Error]: class_code: 020000 [ 148.870845] {1}[Hardware Error]: aer_uncor_status: 0x00100000, aer_uncor_mask: 0x00010000 [ 148.879842] {1}[Hardware Error]: aer_uncor_severity: 0x000ef030 [ 148.886575] {1}[Hardware Error]: TLP Header: 40000001 0000030f 90028090 00000000 [ 148.894823] tg3 0000:04:00.0: AER: aer_status: 0x00100000, aer_mask: 0x00010000 [ 148.902795] tg3 0000:04:00.0: AER: [20] UnsupReq (First) [ 148.910234] tg3 0000:04:00.0: AER: aer_layer=Transaction Layer, aer_agent=Requester ID [ 148.918806] tg3 0000:04:00.0: AER: aer_uncor_severity: 0x000ef030 [ 148.925558] tg3 0000:04:00.0: AER: TLP Header: 40000001 0000030f 90028090 00000000 The MSI is probably raised by incoming packets, so power down the device and disable bus mastering to stop the traffic, as user confirmed this approach works. In addition to that, be extra safe and cancel reset task if it's running. Cc: Josef Bacik Link: https://lore.kernel.org/all/b8db79e6857c41dab4ef08bdf826ea7c47e3bafc.1615947283.git.josef@toxicpanda.com/ BugLink: https://bugs.launchpad.net/bugs/1917471 Signed-off-by: Kai-Heng Feng --- drivers/net/ethernet/broadcom/tg3.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index db1e9d810b416..4fe9e2539eac1 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -18077,15 +18077,18 @@ static void tg3_shutdown(struct pci_dev *pdev) struct tg3 *tp = netdev_priv(dev); rtnl_lock(); + + tg3_reset_task_cancel(tp); netif_device_detach(dev); if (netif_running(dev)) dev_close(dev); - if (system_state == SYSTEM_POWER_OFF) - tg3_power_down(tp); + tg3_power_down(tp); rtnl_unlock(); + + pci_disable_device(pdev); } /**