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 029151CDA1A; Wed, 25 Sep 2024 11:59:12 +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=1727265553; cv=none; b=TYc4YtmH0tF1yvuVo70LoLEHOmqUgdOJvZ/E1bTJk9JC5fd7Yz0bvHi+HvvJpS+OZU0swPmzwKHel5JC65uvRVi5EwFP2uolWxqOtSJ13iijhiWFCy0F6zZDYAEE93TVDZACuSsB+cxez/3uJQABZJtUrxbHeZ7lMwyd2uCXD1Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727265553; c=relaxed/simple; bh=evpAucpxGw2NfOXO+jcEMrOdRcUXped8HsEbvQi2geE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pgOuN2SajYof6AnPBEwi0pBEdaY+CU9eqNW26bBYiQ8qjKbvBi7DbC7oKz9OKX6gZMQPTgacJQ+ip20OZHWozJYdlo0z3uNcidoWCiHjelbdqYhDSATeCFwIl1ndSi48zwB6eHki700j8as5z7pH2+cYBv5Wcc+un78tCd2eqK8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SqBOzoMY; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="SqBOzoMY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CAE9EC4CEC3; Wed, 25 Sep 2024 11:59:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727265552; bh=evpAucpxGw2NfOXO+jcEMrOdRcUXped8HsEbvQi2geE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SqBOzoMY5amqP38pxEL4f0LU6u5bxAXdxmRCD+HO2EDTBSJa7sHfx+2n9XbsCjQq0 cLrd7JrvMlHbwO0YB2hHwzarl5Njr+MY27RFPTRUfTcH3lD2ECYi3s3Ws0/LI8ct2m NIYD6t1VuRTA+ZgOFaBRbY8Ep4Ik575g0SzE4e4Ir7WwIcEvaU/yohOdZbWSPsFFkE Cov+VC7q0Yj+TW9MGPNJspKnQduHsmkek92BFhU8zMiPO4yuq/D9GXywn7tPkI+klI EK4C6d5NU0Wh4rARftDc5QT+JH6aAVJ6D71s898P0ukfpkCMQbgALEWdJA74s/ORl6 J5uomDm3uw83g== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Vitaly Lifshits , Dima Ruinskiy , Mor Bar-Gabay , Tony Nguyen , Sasha Levin , przemyslaw.kitszel@intel.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 6.10 019/197] e1000e: avoid failing the system during pm_suspend Date: Wed, 25 Sep 2024 07:50:38 -0400 Message-ID: <20240925115823.1303019-19-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240925115823.1303019-1-sashal@kernel.org> References: <20240925115823.1303019-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.10.11 Content-Transfer-Encoding: 8bit From: Vitaly Lifshits [ Upstream commit 0a6ad4d9e1690c7faa3a53f762c877e477093657 ] Occasionally when the system goes into pm_suspend, the suspend might fail due to a PHY access error on the network adapter. Previously, this would have caused the whole system to fail to go to a low power state. An example of this was reported in the following Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=205015 [ 1663.694828] e1000e 0000:00:19.0 eth0: Failed to disable ULP [ 1664.731040] asix 2-3:1.0 eth1: link up, 100Mbps, full-duplex, lpa 0xC1E1 [ 1665.093513] e1000e 0000:00:19.0 eth0: Hardware Error [ 1665.596760] e1000e 0000:00:19.0: pci_pm_resume+0x0/0x80 returned 0 after 2975399 usecs and then the system never recovers from it, and all the following suspend failed due to this [22909.393854] PM: pci_pm_suspend(): e1000e_pm_suspend+0x0/0x760 [e1000e] returns -2 [22909.393858] PM: dpm_run_callback(): pci_pm_suspend+0x0/0x160 returns -2 [22909.393861] PM: Device 0000:00:1f.6 failed to suspend async: error -2 This can be avoided by changing the return values of __e1000_shutdown and e1000e_pm_suspend functions so that they always return 0 (success). This is consistent with what other drivers do. If the e1000e driver encounters a hardware error during suspend, potential side effects include slightly higher power draw or non-working wake on LAN. This is preferred to a system-level suspend failure, and a warning message is written to the system log, so that the user can be aware that the LAN controller experienced a problem during suspend. Link: https://bugzilla.kernel.org/show_bug.cgi?id=205015 Suggested-by: Dima Ruinskiy Signed-off-by: Vitaly Lifshits Tested-by: Mor Bar-Gabay Signed-off-by: Tony Nguyen Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/e1000e/netdev.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index 3cd161c6672be..e23eedc791d66 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -6671,8 +6671,10 @@ static int __e1000_shutdown(struct pci_dev *pdev, bool runtime) if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) { /* enable wakeup by the PHY */ retval = e1000_init_phy_wakeup(adapter, wufc); - if (retval) - return retval; + if (retval) { + e_err("Failed to enable wakeup\n"); + goto skip_phy_configurations; + } } else { /* enable wakeup by the MAC */ ew32(WUFC, wufc); @@ -6693,8 +6695,10 @@ static int __e1000_shutdown(struct pci_dev *pdev, bool runtime) * or broadcast. */ retval = e1000_enable_ulp_lpt_lp(hw, !runtime); - if (retval) - return retval; + if (retval) { + e_err("Failed to enable ULP\n"); + goto skip_phy_configurations; + } } } @@ -6726,6 +6730,7 @@ static int __e1000_shutdown(struct pci_dev *pdev, bool runtime) hw->phy.ops.release(hw); } +skip_phy_configurations: /* Release control of h/w to f/w. If f/w is AMT enabled, this * would have already happened in close and is redundant. */ @@ -6968,15 +6973,13 @@ static int e1000e_pm_suspend(struct device *dev) e1000e_pm_freeze(dev); rc = __e1000_shutdown(pdev, false); - if (rc) { - e1000e_pm_thaw(dev); - } else { + if (!rc) { /* Introduce S0ix implementation */ if (adapter->flags2 & FLAG2_ENABLE_S0IX_FLOWS) e1000e_s0ix_entry_flow(adapter); } - return rc; + return 0; } static int e1000e_pm_resume(struct device *dev) -- 2.43.0