From patchwork Mon Feb 1 21:46:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Nguyen X-Patchwork-Id: 12060121 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F2F49C433E0 for ; Mon, 1 Feb 2021 21:46:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AC2F364EC5 for ; Mon, 1 Feb 2021 21:46:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229691AbhBAVqi (ORCPT ); Mon, 1 Feb 2021 16:46:38 -0500 Received: from mga11.intel.com ([192.55.52.93]:26807 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229629AbhBAVqe (ORCPT ); Mon, 1 Feb 2021 16:46:34 -0500 IronPort-SDR: 7DNJE1Pin/iA9MEHjl2NsLKnnNkvbC+/7Dz4gs9Kre1g5j81CVgqSnKqaaPcrmZh1VLQezR/9W +jP582ZgOdzg== X-IronPort-AV: E=McAfee;i="6000,8403,9882"; a="177249325" X-IronPort-AV: E=Sophos;i="5.79,393,1602572400"; d="scan'208";a="177249325" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Feb 2021 13:45:34 -0800 IronPort-SDR: U4oDIVD8mg63hUVZyGSCVCm/6a1dn04/u6rNmMZj7LCWvqrHGLVMnPksDaHMeZ2FT6xvEb7CWh BE6/geh0fbXw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,393,1602572400"; d="scan'208";a="354638537" Received: from anguy11-desk2.jf.intel.com ([10.166.244.147]) by fmsmga007.fm.intel.com with ESMTP; 01 Feb 2021 13:45:34 -0800 From: Tony Nguyen To: davem@davemloft.net, kuba@kernel.org Cc: Kai-Heng Feng , netdev@vger.kernel.org, sassmann@redhat.com, anthony.l.nguyen@intel.com, Sasha Neftin Subject: [PATCH net v2 1/4] igc: Report speed and duplex as unknown when device is runtime suspended Date: Mon, 1 Feb 2021 13:46:15 -0800 Message-Id: <20210201214618.852831-2-anthony.l.nguyen@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210201214618.852831-1-anthony.l.nguyen@intel.com> References: <20210201214618.852831-1-anthony.l.nguyen@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Kai-Heng Feng Similar to commit 165ae7a8feb5 ("igb: Report speed and duplex as unknown when device is runtime suspended"), if we try to read speed and duplex sysfs while the device is runtime suspended, igc will complain and stops working: [ 123.449883] igc 0000:03:00.0 enp3s0: PCIe link lost, device now detached [ 123.450052] BUG: kernel NULL pointer dereference, address: 0000000000000008 [ 123.450056] #PF: supervisor read access in kernel mode [ 123.450058] #PF: error_code(0x0000) - not-present page [ 123.450059] PGD 0 P4D 0 [ 123.450064] Oops: 0000 [#1] SMP NOPTI [ 123.450068] CPU: 0 PID: 2525 Comm: udevadm Tainted: G U W OE 5.10.0-1002-oem #2+rkl2-Ubuntu [ 123.450078] RIP: 0010:igc_rd32+0x1c/0x90 [igc] [ 123.450080] Code: c0 5d c3 b8 fd ff ff ff c3 0f 1f 44 00 00 0f 1f 44 00 00 55 89 f0 48 89 e5 41 56 41 55 41 54 49 89 c4 53 48 8b 57 08 48 01 d0 <44> 8b 28 41 83 fd ff 74 0c 5b 44 89 e8 41 5c 41 5d 4 [ 123.450083] RSP: 0018:ffffb0d100d6fcc0 EFLAGS: 00010202 [ 123.450085] RAX: 0000000000000008 RBX: ffffb0d100d6fd30 RCX: 0000000000000000 [ 123.450087] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff945a12716c10 [ 123.450089] RBP: ffffb0d100d6fce0 R08: ffff945a12716550 R09: ffff945a09874000 [ 123.450090] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000008 [ 123.450092] R13: ffff945a12716000 R14: ffff945a037da280 R15: ffff945a037da290 [ 123.450094] FS: 00007f3b34c868c0(0000) GS:ffff945b89200000(0000) knlGS:0000000000000000 [ 123.450096] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 123.450098] CR2: 0000000000000008 CR3: 00000001144de006 CR4: 0000000000770ef0 [ 123.450100] PKRU: 55555554 [ 123.450101] Call Trace: [ 123.450111] igc_ethtool_get_link_ksettings+0xd6/0x1b0 [igc] [ 123.450118] __ethtool_get_link_ksettings+0x71/0xb0 [ 123.450123] duplex_show+0x74/0xc0 [ 123.450129] dev_attr_show+0x1d/0x40 [ 123.450134] sysfs_kf_seq_show+0xa1/0x100 [ 123.450137] kernfs_seq_show+0x27/0x30 [ 123.450142] seq_read+0xb7/0x400 [ 123.450148] ? common_file_perm+0x72/0x170 [ 123.450151] kernfs_fop_read+0x35/0x1b0 [ 123.450155] vfs_read+0xb5/0x1b0 [ 123.450157] ksys_read+0x67/0xe0 [ 123.450160] __x64_sys_read+0x1a/0x20 [ 123.450164] do_syscall_64+0x38/0x90 [ 123.450168] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 123.450170] RIP: 0033:0x7f3b351fe142 [ 123.450173] Code: c0 e9 c2 fe ff ff 50 48 8d 3d 3a ca 0a 00 e8 f5 19 02 00 0f 1f 44 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48 83 ec 28 48 89 54 24 [ 123.450174] RSP: 002b:00007fffef2ec138 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 123.450177] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3b351fe142 [ 123.450179] RDX: 0000000000001001 RSI: 00005644c047f070 RDI: 0000000000000003 [ 123.450180] RBP: 00007fffef2ec340 R08: 00005644c047f070 R09: 00007f3b352d9320 [ 123.450182] R10: 00005644c047c010 R11: 0000000000000246 R12: 00005644c047cbf0 [ 123.450184] R13: 00005644c047e6d0 R14: 0000000000000003 R15: 00007fffef2ec140 [ 123.450189] Modules linked in: rfcomm ccm cmac algif_hash algif_skcipher af_alg bnep toshiba_acpi industrialio toshiba_haps hp_accel lis3lv02d btusb btrtl btbcm btintel bluetooth ecdh_generic ecc joydev input_leds nls_iso8859_1 snd_sof_pci snd_sof_intel_byt snd_sof_intel_ipc snd_sof_intel_hda_common snd_soc_hdac_hda snd_hda_codec_hdmi snd_sof_xtensa_dsp snd_sof_intel_hda snd_sof snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_intel snd_intel_dspcfg soundwire_intel soundwire_generic_allocation soundwire_cadence snd_hda_codec snd_hda_core ath10k_pci snd_hwdep intel_rapl_msr intel_rapl_common ath10k_core soundwire_bus snd_soc_core x86_pkg_temp_thermal ath intel_powerclamp snd_compress ac97_bus snd_pcm_dmaengine mac80211 snd_pcm coretemp snd_seq_midi snd_seq_midi_event snd_rawmidi kvm_intel cfg80211 snd_seq snd_seq_device snd_timer mei_hdcp kvm libarc4 snd crct10dif_pclmul ghash_clmulni_intel aesni_intel mei_me dell_wmi [ 123.450266] dell_smbios soundcore sparse_keymap dcdbas crypto_simd cryptd mei dell_uart_backlight glue_helper ee1004 wmi_bmof intel_wmi_thunderbolt dell_wmi_descriptor mac_hid efi_pstore acpi_pad acpi_tad intel_cstate sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs blake2b_generic raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear dm_mirror dm_region_hash dm_log hid_generic usbhid hid i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cec crc32_pclmul rc_core drm intel_lpss_pci i2c_i801 ahci igc intel_lpss i2c_smbus idma64 xhci_pci libahci virt_dma xhci_pci_renesas wmi video pinctrl_tigerlake [ 123.450335] CR2: 0000000000000008 [ 123.450338] ---[ end trace 9f731e38b53c35cc ]--- The more generic approach will be wrap get_link_ksettings() with begin() and complete() callbacks, and calls runtime resume and runtime suspend routine respectively. However, igc is like igb, runtime resume routine uses rtnl_lock() which upper ethtool layer also uses. So to prevent a deadlock on rtnl, take a different approach, use pm_runtime_suspended() to avoid reading register while device is runtime suspended. Fixes: 8c5ad0dae93c ("igc: Add ethtool support") Signed-off-by: Kai-Heng Feng Acked-by: Sasha Neftin Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/igc/igc_ethtool.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/igc/igc_ethtool.c b/drivers/net/ethernet/intel/igc/igc_ethtool.c index 831f2f09de5f..ec8cd69d4992 100644 --- a/drivers/net/ethernet/intel/igc/igc_ethtool.c +++ b/drivers/net/ethernet/intel/igc/igc_ethtool.c @@ -1714,7 +1714,8 @@ static int igc_ethtool_get_link_ksettings(struct net_device *netdev, Asym_Pause); } - status = rd32(IGC_STATUS); + status = pm_runtime_suspended(&adapter->pdev->dev) ? + 0 : rd32(IGC_STATUS); if (status & IGC_STATUS_LU) { if (status & IGC_STATUS_SPEED_1000) { From patchwork Mon Feb 1 21:46:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Nguyen X-Patchwork-Id: 12060123 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A85BFC433E0 for ; Mon, 1 Feb 2021 21:47:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6D1AE6024A for ; Mon, 1 Feb 2021 21:47:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229721AbhBAVq7 (ORCPT ); Mon, 1 Feb 2021 16:46:59 -0500 Received: from mga11.intel.com ([192.55.52.93]:26807 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229593AbhBAVqv (ORCPT ); Mon, 1 Feb 2021 16:46:51 -0500 IronPort-SDR: ohe2jvYSi0w3P4LROZ9yN96V9+L8oR8m5H2fz2xvgxm0AQLs72PoR3eVP8D3H8mZ0AFk95ET9d GFI7Q9xpOtwA== X-IronPort-AV: E=McAfee;i="6000,8403,9882"; a="177249327" X-IronPort-AV: E=Sophos;i="5.79,393,1602572400"; d="scan'208";a="177249327" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Feb 2021 13:45:35 -0800 IronPort-SDR: 05zErSUqQECXbnmdWS5s50xzau/LivZ6ebg/944A0F1FvvxR/Hd7RTkRHMXiQvuFPZJnti+B4t 00Ge0S5o7hNg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,393,1602572400"; d="scan'208";a="354638540" Received: from anguy11-desk2.jf.intel.com ([10.166.244.147]) by fmsmga007.fm.intel.com with ESMTP; 01 Feb 2021 13:45:34 -0800 From: Tony Nguyen To: davem@davemloft.net, kuba@kernel.org Cc: Kevin Lo , netdev@vger.kernel.org, sassmann@redhat.com, anthony.l.nguyen@intel.com Subject: [PATCH net v2 2/4] igc: set the default return value to -IGC_ERR_NVM in igc_write_nvm_srwr Date: Mon, 1 Feb 2021 13:46:16 -0800 Message-Id: <20210201214618.852831-3-anthony.l.nguyen@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210201214618.852831-1-anthony.l.nguyen@intel.com> References: <20210201214618.852831-1-anthony.l.nguyen@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Kevin Lo This patch sets the default return value to -IGC_ERR_NVM in igc_write_nvm_srwr. Without this change it wouldn't lead to a shadow RAM write EEWR timeout. Fixes: ab4056126813 ("igc: Add NVM support") Signed-off-by: Kevin Lo Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/igc/igc_i225.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc_i225.c b/drivers/net/ethernet/intel/igc/igc_i225.c index 8b67d9b49a83..7ec04e48860c 100644 --- a/drivers/net/ethernet/intel/igc/igc_i225.c +++ b/drivers/net/ethernet/intel/igc/igc_i225.c @@ -219,9 +219,9 @@ static s32 igc_write_nvm_srwr(struct igc_hw *hw, u16 offset, u16 words, u16 *data) { struct igc_nvm_info *nvm = &hw->nvm; + s32 ret_val = -IGC_ERR_NVM; u32 attempts = 100000; u32 i, k, eewr = 0; - s32 ret_val = 0; /* A check for invalid values: offset too large, too many words, * too many words for the offset, and not enough words. @@ -229,7 +229,6 @@ static s32 igc_write_nvm_srwr(struct igc_hw *hw, u16 offset, u16 words, if (offset >= nvm->word_size || (words > (nvm->word_size - offset)) || words == 0) { hw_dbg("nvm parameter(s) out of bounds\n"); - ret_val = -IGC_ERR_NVM; goto out; } From patchwork Mon Feb 1 21:46:17 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Nguyen X-Patchwork-Id: 12060125 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EE242C433E6 for ; Mon, 1 Feb 2021 21:47:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 97BD86024A for ; Mon, 1 Feb 2021 21:47:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229703AbhBAVrG (ORCPT ); Mon, 1 Feb 2021 16:47:06 -0500 Received: from mga11.intel.com ([192.55.52.93]:26856 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229732AbhBAVq7 (ORCPT ); Mon, 1 Feb 2021 16:46:59 -0500 IronPort-SDR: zMFUW3djnRIlWUxFvkb/ZVxGxqnJV/8UsFD7oLyQS1kzb7yRfGxyUnJSfBCU40HYyzFfzWs5y1 Mv1xUsaYeSyQ== X-IronPort-AV: E=McAfee;i="6000,8403,9882"; a="177249333" X-IronPort-AV: E=Sophos;i="5.79,393,1602572400"; d="scan'208";a="177249333" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Feb 2021 13:45:35 -0800 IronPort-SDR: lJXxmTkH10t+hNypcDrCBWfCbQkrQ6uQpNr8oG0wN3C4qT/KeuZyKhVfVhiHRoJlkZjG89VCMZ XRBMzHX3WqcQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,393,1602572400"; d="scan'208";a="354638544" Received: from anguy11-desk2.jf.intel.com ([10.166.244.147]) by fmsmga007.fm.intel.com with ESMTP; 01 Feb 2021 13:45:34 -0800 From: Tony Nguyen To: davem@davemloft.net, kuba@kernel.org Cc: Kevin Lo , netdev@vger.kernel.org, sassmann@redhat.com, anthony.l.nguyen@intel.com, Sasha Neftin Subject: [PATCH net v2 3/4] igc: check return value of ret_val in igc_config_fc_after_link_up Date: Mon, 1 Feb 2021 13:46:17 -0800 Message-Id: <20210201214618.852831-4-anthony.l.nguyen@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210201214618.852831-1-anthony.l.nguyen@intel.com> References: <20210201214618.852831-1-anthony.l.nguyen@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Kevin Lo Check return value from ret_val to make error check actually work. Fixes: 4eb8080143a9 ("igc: Add setup link functionality") Signed-off-by: Kevin Lo Acked-by: Sasha Neftin Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/igc/igc_mac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/igc/igc_mac.c b/drivers/net/ethernet/intel/igc/igc_mac.c index 09cd0ec7ee87..67b8ffd21d8a 100644 --- a/drivers/net/ethernet/intel/igc/igc_mac.c +++ b/drivers/net/ethernet/intel/igc/igc_mac.c @@ -638,7 +638,7 @@ s32 igc_config_fc_after_link_up(struct igc_hw *hw) } out: - return 0; + return ret_val; } /** From patchwork Mon Feb 1 21:46:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Nguyen X-Patchwork-Id: 12060127 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B0B66C433E0 for ; Mon, 1 Feb 2021 21:47:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 701BD64EC5 for ; Mon, 1 Feb 2021 21:47:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229638AbhBAVrO (ORCPT ); Mon, 1 Feb 2021 16:47:14 -0500 Received: from mga11.intel.com ([192.55.52.93]:26807 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229606AbhBAVrI (ORCPT ); Mon, 1 Feb 2021 16:47:08 -0500 IronPort-SDR: MOP4gxcW/Mxhri+PhISnNcwV2534T6sniyjoZzuvZWGRx15Q+KokFdfVn5gbatv2Kh3hkz0RhK zg8JcVXg2kzg== X-IronPort-AV: E=McAfee;i="6000,8403,9882"; a="177249334" X-IronPort-AV: E=Sophos;i="5.79,393,1602572400"; d="scan'208";a="177249334" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Feb 2021 13:45:35 -0800 IronPort-SDR: ikM4O0pY+NfrHBZnpOhq6S/dpdGex49iuK9QgquWpW+hV2DSiWuu/eyCu4pLXs6kRgd8oKgZ4E vOEDBYdB+BsA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,393,1602572400"; d="scan'208";a="354638546" Received: from anguy11-desk2.jf.intel.com ([10.166.244.147]) by fmsmga007.fm.intel.com with ESMTP; 01 Feb 2021 13:45:35 -0800 From: Tony Nguyen To: davem@davemloft.net, kuba@kernel.org Cc: Aleksandr Loktionov , netdev@vger.kernel.org, sassmann@redhat.com, anthony.l.nguyen@intel.com, Arkadiusz Kubalewski , Konrad Jankowski Subject: [PATCH net v2 4/4] i40e: Revert "i40e: don't report link up for a VF who hasn't enabled queues" Date: Mon, 1 Feb 2021 13:46:18 -0800 Message-Id: <20210201214618.852831-5-anthony.l.nguyen@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210201214618.852831-1-anthony.l.nguyen@intel.com> References: <20210201214618.852831-1-anthony.l.nguyen@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Aleksandr Loktionov This reverts commit 2ad1274fa35ace5c6360762ba48d33b63da2396c VF queues were not brought up when PF was brought up after being downed if the VF driver disabled VFs queues during PF down. This could happen in some older or external VF driver implementations. The problem was that PF driver used vf->queues_enabled as a condition to decide what link-state it would send out which caused the issue. Remove the check for vf->queues_enabled in the VF link notify. Now VF will always be notified of the current link status. Also remove the queues_enabled member from i40e_vf structure as it is not used anymore. Otherwise VNF implementation was broken and caused a link flap. The original commit was a workaround to avoid breaking existing VFs though it's really a fault of the VF code not the PF. The commit should be safe to revert as all of the VFs we know of have been fixed. Also, since we now know there is a related bug in the workaround, removing it is preferred. Fixes: 2ad1274fa35a ("i40e: don't report link up for a VF who hasn't enabled") Signed-off-by: Aleksandr Loktionov Signed-off-by: Arkadiusz Kubalewski Tested-by: Konrad Jankowski Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 13 +------------ drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h | 1 - 2 files changed, 1 insertion(+), 13 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index 7efc61aacb0a..1b6ec9be155a 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -55,12 +55,7 @@ static void i40e_vc_notify_vf_link_state(struct i40e_vf *vf) pfe.event = VIRTCHNL_EVENT_LINK_CHANGE; pfe.severity = PF_EVENT_SEVERITY_INFO; - - /* Always report link is down if the VF queues aren't enabled */ - if (!vf->queues_enabled) { - pfe.event_data.link_event.link_status = false; - pfe.event_data.link_event.link_speed = 0; - } else if (vf->link_forced) { + if (vf->link_forced) { pfe.event_data.link_event.link_status = vf->link_up; pfe.event_data.link_event.link_speed = (vf->link_up ? i40e_virtchnl_link_speed(ls->link_speed) : 0); @@ -70,7 +65,6 @@ static void i40e_vc_notify_vf_link_state(struct i40e_vf *vf) pfe.event_data.link_event.link_speed = i40e_virtchnl_link_speed(ls->link_speed); } - i40e_aq_send_msg_to_vf(hw, abs_vf_id, VIRTCHNL_OP_EVENT, 0, (u8 *)&pfe, sizeof(pfe), NULL); } @@ -2443,8 +2437,6 @@ static int i40e_vc_enable_queues_msg(struct i40e_vf *vf, u8 *msg) } } - vf->queues_enabled = true; - error_param: /* send the response to the VF */ return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_ENABLE_QUEUES, @@ -2466,9 +2458,6 @@ static int i40e_vc_disable_queues_msg(struct i40e_vf *vf, u8 *msg) struct i40e_pf *pf = vf->pf; i40e_status aq_ret = 0; - /* Immediately mark queues as disabled */ - vf->queues_enabled = false; - if (!test_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states)) { aq_ret = I40E_ERR_PARAM; goto error_param; diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h index 5491215d81de..091e32c1bb46 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h @@ -98,7 +98,6 @@ struct i40e_vf { unsigned int tx_rate; /* Tx bandwidth limit in Mbps */ bool link_forced; bool link_up; /* only valid if VF link is forced */ - bool queues_enabled; /* true if the VF queues are enabled */ bool spoofchk; u16 num_vlan;