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This situation can occur, for example, if a firmware fatal error is detected during polling. This change halts the polling process when the command interface goes down, preventing unnecessary waits. Fixes: b898ce7bccf1 ("net/mlx5: cmdif, Avoid skipping reclaim pages if FW i= s not accessible") Signed-off-by: Moshe Shemesh Reviewed-by: Shay Drori Signed-off-by: Tariq Toukan --- drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/et= hernet/mellanox/mlx5/core/cmd.c index e395ef5f356e..722282cebce9 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c @@ -294,6 +294,10 @@ static void poll_timeout(struct mlx5_cmd_work_ent *ent) return; } cond_resched(); + if (mlx5_cmd_is_down(dev)) { + ent->ret =3D -ENXIO; + return; + } } while (time_before(jiffies, poll_end)); =20 ent->ret =3D -ETIMEDOUT; @@ -1070,7 +1074,7 @@ static void cmd_work_handler(struct work_struct *work) poll_timeout(ent); /* make sure we read the descriptor after ownership is SW */ rmb(); - mlx5_cmd_comp_handler(dev, 1ULL << ent->idx, (ent->ret =3D=3D -ETIMEDOUT= )); 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Miller" CC: Saeed Mahameed , Leon Romanovsky , Tariq Toukan , Mark Bloch , , , , Gal Pressman , Moshe Shemesh , Shay Drori Subject: [PATCH net 2/3] net/mlx5: pagealloc: Fix reclaim race during command interface teardown Date: Mon, 29 Sep 2025 00:02:08 +0300 Message-ID: <1759093329-840612-3-git-send-email-tariqt@nvidia.com> X-Mailer: git-send-email 2.8.0 In-Reply-To: <1759093329-840612-1-git-send-email-tariqt@nvidia.com> References: <1759093329-840612-1-git-send-email-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN1PEPF0000468A:EE_|CY3PR12MB9578:EE_ X-MS-Office365-Filtering-Correlation-Id: cd479db1-193c-4ca8-6c05-08ddfed25d62 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|1800799024|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?wSTnKyBq27+LA3nzPKzRfhYmm0OBNqqAXQ5m5sTfytMONRGkivSJ1mVWK+ih?= =?us-ascii?Q?J/RPxx/i20+RNAwQmaB/T6iCe8XQlg82SmWjacQqoAIOLJ+iUz/ZW+bM22t7?= =?us-ascii?Q?wXmCaGPGLp8HHD/CHY7Cp6G9PJTiEsraDvblDgh2Js0boS4ywGm0SxUIhGpV?= =?us-ascii?Q?+hP/4XL7nhb2788DoXmvPM2doS6Zo0dyoY1zEFvPbYp8AO4oYpTEW4wvE6jq?= =?us-ascii?Q?oIBVwfHKbmQyi4GoAkeAonIK8ZDOPXY8CDuCPBpOAPtDXdA4+Mhy9zB8diX1?= =?us-ascii?Q?Tpq30X745nF9M55v+ySialFdrodHlrCMAfMsSBeNlPRAdtjv/YM2tD3NUIU9?= =?us-ascii?Q?tVu3eET7Gqoy1raolXkSGj615Xkgp3AReWD1+SembFhcoMF9doXelf1wfXVP?= =?us-ascii?Q?itZ40KoGbG10sZSZfXaqmzoKt3ZY2n2UJVJ0YTAVbI3TyxwYouyO/7yibl/W?= =?us-ascii?Q?xHDieTI4Y8/DSdoVmagUKyRJ7O3UKtaM7aTAH5x7zx+qjBJqixyCScwL3eaL?= =?us-ascii?Q?nuu7mlExn+m4yB9n1eqjmSY+LWkSizWxAqcVzTPXD/uo8TabobI80tZx0V8e?= =?us-ascii?Q?zSIGpGXrcuUxUn5fOwJNq0FmsQ+a6g/HsqXD1PeKXJq5/yQzlZQeo+xdxyxg?= =?us-ascii?Q?Il+iFwiYbApk8xnWFrEzsON+WSor51lI5rfGDi/XHebdV7wIn8tQYEyBHhyf?= =?us-ascii?Q?M9hZFNXZic9N9Xi+N47/zQ0A3dklbqTk8r6RyV2gELaBQ89dBFzEQtdpaept?= =?us-ascii?Q?/rP3Zn0an7NKBaFSO1piktvdmmBTTL7sMGNQ/PWu8JQ1bjc+QJpjKP/e5YPK?= =?us-ascii?Q?T4ohMeLeEkdE/1WGfQRDq18E9D8RTmQQLBZkT922PV+U8ix1Soer7m2mYspL?= =?us-ascii?Q?ZGipaE/5rDcnripgHRRgclEukH7wEccGM2ykOTp6mZogZ/cWNFnNNAmAjiO4?= =?us-ascii?Q?7XryIOQtj1eek7JJuOxWGgZVzjvB5mQwDLCNn3Iy3uNbsCClQven5hqvIO43?= =?us-ascii?Q?wkggpwRz5SZYnoHw8gHeMV4p/T3uHcaGjeCNZnbV+uLnDWm+JsmZNK8JBEvF?= =?us-ascii?Q?ZbDF7+cuJVeHEDnnVEYxUgR6TTnd6c1BqJ2bu1+NIH1BzbvkmGqrB5j0ns5i?= =?us-ascii?Q?n52bbUk+RlD6rvT4j2Pn5KpRh9Za4ZhRJaWqx2/9F9ig4B69BuW7xwBfTowq?= =?us-ascii?Q?jf6DnrPBeM0odAyvclVISU/czvk6+7/XP8PEXw1LgEBv33KQwZEdq/WzuTqs?= =?us-ascii?Q?datbeq0x7tialwHhhbYs06cBSMVSNmBgJsXbeVqrhSNoiLUqHdCCBYitZwS5?= =?us-ascii?Q?1ILUyCmfsVgemUG/G6b2Qz/xW8qGs+QiuCYP7gYqIqtS+v09mk1IkC4uYaiw?= =?us-ascii?Q?RghdFNg5/kLjauft8WZTf2mL3L8G78JKHbHdgbkteJY/QS5+IwPAogQPjFeF?= =?us-ascii?Q?BMfK6WBUHR90UDqftZa1IAIOb5EjuTkMYBqqsYKW6eFSVbUriHWu/LLB4we+?= =?us-ascii?Q?mI2GMLyyzSFXAMtNGbErfkhBGcMWlaqzRvpmv1bYorRSx5rRcafiLJRR6pBd?= =?us-ascii?Q?NwxhDyASnDqiZGF5nSg=3D?= X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(82310400026)(1800799024)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Sep 2025 21:02:41.6721 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: cd479db1-193c-4ca8-6c05-08ddfed25d62 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN1PEPF0000468A.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY3PR12MB9578 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Shay Drory The reclaim_pages_cmd() function sends a command to the firmware to reclaim pages if the command interface is active. A race condition can occur if the command interface goes down (e.g., due to a PCI error) while the mlx5_cmd_do() call is in flight. In this case, mlx5_cmd_do() will return an error. The original code would propagate this error immediately, bypassing the software-based page reclamation logic that is supposed to run when the command interface is down. Fix this by checking whether mlx5_cmd_do() returns -ENXIO, which mark that command interface is down. If this is the case, fall through to the software reclamation path. If the command failed for any another reason, or finished successfully, return as before. Fixes: b898ce7bccf1 ("net/mlx5: cmdif, Avoid skipping reclaim pages if FW i= s not accessible") Signed-off-by: Shay Drory Reviewed-by: Moshe Shemesh Signed-off-by: Tariq Toukan --- drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c b/drivers/= net/ethernet/mellanox/mlx5/core/pagealloc.c index 9bc9bd83c232..cd68c4b2c0bf 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c @@ -489,9 +489,12 @@ static int reclaim_pages_cmd(struct mlx5_core_dev *dev, u32 func_id; u32 npages; u32 i =3D 0; + int err; =20 - if (!mlx5_cmd_is_down(dev)) - return mlx5_cmd_do(dev, in, in_size, out, out_size); + err =3D mlx5_cmd_do(dev, in, in_size, out, out_size); + /* If FW is gone (-ENXIO), proceed to forceful reclaim */ + if (err !=3D -ENXIO) + return err; =20 /* No hard feelings, we want our pages back! */ npages =3D MLX5_GET(manage_pages_in, in, input_num_entries); 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Miller" CC: Saeed Mahameed , Leon Romanovsky , Tariq Toukan , Mark Bloch , , , , Gal Pressman , Moshe Shemesh , Shay Drori Subject: [PATCH net 3/3] net/mlx5: fw reset, add reset timeout work Date: Mon, 29 Sep 2025 00:02:09 +0300 Message-ID: <1759093329-840612-4-git-send-email-tariqt@nvidia.com> X-Mailer: git-send-email 2.8.0 In-Reply-To: <1759093329-840612-1-git-send-email-tariqt@nvidia.com> References: <1759093329-840612-1-git-send-email-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN1PEPF0000468B:EE_|CH1PPF9C964DBFE:EE_ X-MS-Office365-Filtering-Correlation-Id: a95d6147-ee97-4514-ab88-08ddfed260fe X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700013|376014|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?2tAjYl5P9HV9SHJQCkBOfEkMqQOgHPChzpURP/4YEx5bv2m/I8ZVMjWgLupD?= =?us-ascii?Q?GpbOidDjzOleCCgd0ZG6JWproEmeOQ6mObusQSisGp5F945KAZsb2kuj/reJ?= =?us-ascii?Q?TwrPByFPQNp4/YSRMg4SuwDzpAqdB59hpnLTaJy8EMeKUmAQgGb5N2Q8pmO/?= =?us-ascii?Q?rtmUm8weEziGI7XuOvx8DnFEivThPR5+aW2ndGrUyuszKU4s4ACZaESGxEcu?= =?us-ascii?Q?oaTdzXVOgS5vggBUA5Re213kmfLcxjcmOrzV+vXBR6DhVcDihQLS06GMkvWP?= =?us-ascii?Q?mS2Uv/LQVHrEJFtbJGu7n9ekLXgizvWsBQTArE48ztEgY+Yhkhc0jAvQDbDQ?= =?us-ascii?Q?khPkAVrRpDCx98HjIiM4LnJ2JS+SGyNAwfoQbigadOumLMx/AQU7FIsk+rVT?= =?us-ascii?Q?dAvYmlhTrLSegCNzTveJXMTlP9M5i7i4fLkMPdHeTeGZQTz5BbieFoMITGrl?= =?us-ascii?Q?zeAFF886WIIk77cTUFsouzEMAeZTmLdeQFSFTgfD1V2Hi9egMOWJvRF/rF0C?= =?us-ascii?Q?YRR80i6rMDoUdHOWOIUAud8Z+TmB/AzNFCHZ2syfYYWcUh7dgnhp1smlfT0G?= =?us-ascii?Q?f2j/Em6fO01tCbVFWXnGvzXiPSE7ApFZ7/ZrFdzuastDJrRXXwSeA7uUbhYn?= =?us-ascii?Q?4w1FYxWAeFmJdhHlL0VnH0kaSaUQZK+DFc2xIH4eQa/SDp1FfqIIdqIhGKOJ?= =?us-ascii?Q?1f7+tCmgsGyl/ef8ZTScfIJ4Z/1q1NhzZb6JHufhPnff25LDtC9SRcma+Fup?= =?us-ascii?Q?ipOdr8krgvy7KQPcjjXvXcnUte1JWNJfC247PRywwl2MyTQF1B3O8XcfacUJ?= =?us-ascii?Q?6vXjjCHMNQx/9NJ9rsOcEA/rgoUzlPxiInjiJg8CNE4rvR8swC3jLs/ocKmD?= =?us-ascii?Q?BRKTEIfV7raB1jNOf/nj3bLgQR2wS0q1r10PuBulchJpPRTNaXyR5iqqlFYg?= =?us-ascii?Q?GJI5F59yO5PSwiqkPfkgTcdtIOAAMQy/5YL5aMkue6ljejF0cNVn28YhtMVp?= =?us-ascii?Q?LNDRHO3U3JVfP/A5I6ag1YaAyusALaZua/AsREl/USOElzB7qKpcqrwu92Oo?= =?us-ascii?Q?F+nO3QrbVHH/mdFU74slq+xy/foGKcXd1VRLFFVWqTBLMI81d2eP18DAznKQ?= =?us-ascii?Q?DprT4AXyZvfKB+MVjWAMUkZhq0g0TNnh4w4DF11KYHqPdKM6Ul7akB3LJ4o0?= =?us-ascii?Q?pfWtNT3wvsSWNFfGi+ZMaQVcQ4i8xNdG7SCx5S1efpaW4JbTc5Qzl2Z16J/h?= =?us-ascii?Q?+tdqZIYxeVgMdvO/zcsvvhrYeDT9cp83p4SX04rQMmwGkbj2YpGazar+miPB?= =?us-ascii?Q?jI4PSD3cwbwj6dJI3W8/CQnHzxzLCJcfRKqx4lXz/Cxi95m3bG8SiXBIqF7O?= =?us-ascii?Q?qUEIlW1H+dApymshCD0WRMl2nciJh/pEgWDdqS16YRX/A26A7FnqsAC9i3wU?= =?us-ascii?Q?UtO8TN0eWzG85stS8uK1PdEaiw+8MslpNJLdggZnKFctQqoKRnVKUtgnbSTc?= =?us-ascii?Q?187Nof+MvEY66IHPHpxmehXvF0KZQWIs2ZVt5jQ1ebBOfs9hmbVl1wSHAx6g?= =?us-ascii?Q?FnHtjK1P6DUKvr3M8yc=3D?= X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(36860700013)(376014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Sep 2025 21:02:47.8495 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a95d6147-ee97-4514-ab88-08ddfed260fe X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN1PEPF0000468B.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH1PPF9C964DBFE Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Moshe Shemesh Add sync reset timeout to stop poll_sync_reset in case there was no reset done or abort event within timeout. Otherwise poll sync reset will just continue and in case of fw fatal error no health reporting will be done. Fixes: 38b9f903f22b ("net/mlx5: Handle sync reset request event") Signed-off-by: Moshe Shemesh Reviewed-by: Shay Drori Signed-off-by: Tariq Toukan --- .../ethernet/mellanox/mlx5/core/fw_reset.c | 24 +++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c b/drivers/n= et/ethernet/mellanox/mlx5/core/fw_reset.c index 22995131824a..89e399606877 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c @@ -27,6 +27,7 @@ struct mlx5_fw_reset { struct work_struct reset_reload_work; struct work_struct reset_now_work; struct work_struct reset_abort_work; + struct delayed_work reset_timeout_work; unsigned long reset_flags; u8 reset_method; struct timer_list timer; @@ -259,6 +260,8 @@ static int mlx5_sync_reset_clear_reset_requested(struct= mlx5_core_dev *dev, bool return -EALREADY; } =20 + if (current_work() !=3D &fw_reset->reset_timeout_work.work) + cancel_delayed_work(&fw_reset->reset_timeout_work); mlx5_stop_sync_reset_poll(dev); if (poll_health) mlx5_start_health_poll(dev); @@ -330,6 +333,11 @@ static int mlx5_sync_reset_set_reset_requested(struct = mlx5_core_dev *dev) } mlx5_stop_health_poll(dev, true); mlx5_start_sync_reset_poll(dev); + + if (!test_bit(MLX5_FW_RESET_FLAGS_DROP_NEW_REQUESTS, + &fw_reset->reset_flags)) + schedule_delayed_work(&fw_reset->reset_timeout_work, + msecs_to_jiffies(mlx5_tout_ms(dev, PCI_SYNC_UPDATE))); return 0; } =20 @@ -739,6 +747,19 @@ static void mlx5_sync_reset_events_handle(struct mlx5_= fw_reset *fw_reset, struct } } =20 +static void mlx5_sync_reset_timeout_work(struct work_struct *work) +{ + struct delayed_work *dwork =3D container_of(work, struct delayed_work, + work); + struct mlx5_fw_reset *fw_reset =3D + container_of(dwork, struct mlx5_fw_reset, reset_timeout_work); + struct mlx5_core_dev *dev =3D fw_reset->dev; + + if (mlx5_sync_reset_clear_reset_requested(dev, true)) + return; + mlx5_core_warn(dev, "PCI Sync FW Update Reset Timeout.\n"); +} + static int fw_reset_event_notifier(struct notifier_block *nb, unsigned lon= g action, void *data) { struct mlx5_fw_reset *fw_reset =3D mlx5_nb_cof(nb, struct mlx5_fw_reset, = nb); @@ -822,6 +843,7 @@ void mlx5_drain_fw_reset(struct mlx5_core_dev *dev) cancel_work_sync(&fw_reset->reset_reload_work); cancel_work_sync(&fw_reset->reset_now_work); cancel_work_sync(&fw_reset->reset_abort_work); + cancel_delayed_work(&fw_reset->reset_timeout_work); } =20 static const struct devlink_param mlx5_fw_reset_devlink_params[] =3D { @@ -865,6 +887,8 @@ int mlx5_fw_reset_init(struct mlx5_core_dev *dev) INIT_WORK(&fw_reset->reset_reload_work, mlx5_sync_reset_reload_work); INIT_WORK(&fw_reset->reset_now_work, mlx5_sync_reset_now_event); INIT_WORK(&fw_reset->reset_abort_work, mlx5_sync_reset_abort_event); + INIT_DELAYED_WORK(&fw_reset->reset_timeout_work, + mlx5_sync_reset_timeout_work); =20 init_completion(&fw_reset->done); return 0; --=20 2.31.1