netdev - [PATCH net-next 5/5] ice: Fix debugfs with devlink reload

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Message-ID: <20240212211202.1051990-6-anthony.l.nguyen@intel.com>
Date: Mon, 12 Feb 2024 13:11:59 -0800
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	netdev@...r.kernel.org
Cc: Wojciech Drewek <wojciech.drewek@...el.com>,
	anthony.l.nguyen@...el.com,
	Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com>,
	Brett Creeley <brett.creeley@....com>,
	Simon Horman <horms@...nel.org>
Subject: [PATCH net-next 5/5] ice: Fix debugfs with devlink reload

From: Wojciech Drewek <wojciech.drewek@...el.com>

During devlink reload it is needed to remove debugfs entries
correlated with only one PF. ice_debugfs_exit() removes all
entries created by ice driver so we can't use it.

Introduce ice_debugfs_pf_deinit() in order to release PF's
debugfs entries. Move ice_debugfs_exit() call to ice_module_exit(),
it makes more sense since ice_debugfs_init() is called in
ice_module_init() and not in ice_probe().

Signed-off-by: Wojciech Drewek <wojciech.drewek@...el.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com> (A Contingent worker at Intel)
Reviewed-by: Brett Creeley <brett.creeley@....com>
Reviewed-by: Simon Horman <horms@...nel.org>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/ice/ice.h         |  1 +
 drivers/net/ethernet/intel/ice/ice_debugfs.c | 10 ++++++++++
 drivers/net/ethernet/intel/ice/ice_fwlog.c   |  2 ++
 drivers/net/ethernet/intel/ice/ice_main.c    |  3 +--
 4 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index 118e84835720..365c03d1c462 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -896,6 +896,7 @@ static inline bool ice_is_adq_active(struct ice_pf *pf)
 }
 
 void ice_debugfs_fwlog_init(struct ice_pf *pf);
+void ice_debugfs_pf_deinit(struct ice_pf *pf);
 void ice_debugfs_init(void);
 void ice_debugfs_exit(void);
 void ice_pf_fwlog_update_module(struct ice_pf *pf, int log_level, int module);
diff --git a/drivers/net/ethernet/intel/ice/ice_debugfs.c b/drivers/net/ethernet/intel/ice/ice_debugfs.c
index 85aa31dd86b1..d252d98218d0 100644
--- a/drivers/net/ethernet/intel/ice/ice_debugfs.c
+++ b/drivers/net/ethernet/intel/ice/ice_debugfs.c
@@ -644,6 +644,16 @@ void ice_debugfs_fwlog_init(struct ice_pf *pf)
 	kfree(fw_modules);
 }
 
+/**
+ * ice_debugfs_pf_deinit - cleanup PF's debugfs
+ * @pf: pointer to the PF struct
+ */
+void ice_debugfs_pf_deinit(struct ice_pf *pf)
+{
+	debugfs_remove_recursive(pf->ice_debugfs_pf);
+	pf->ice_debugfs_pf = NULL;
+}
+
 /**
  * ice_debugfs_init - create root directory for debugfs entries
  */
diff --git a/drivers/net/ethernet/intel/ice/ice_fwlog.c b/drivers/net/ethernet/intel/ice/ice_fwlog.c
index 92b5dac481cd..4fd15387a7e5 100644
--- a/drivers/net/ethernet/intel/ice/ice_fwlog.c
+++ b/drivers/net/ethernet/intel/ice/ice_fwlog.c
@@ -188,6 +188,8 @@ void ice_fwlog_deinit(struct ice_hw *hw)
 	if (hw->bus.func)
 		return;
 
+	ice_debugfs_pf_deinit(hw->back);
+
 	/* make sure FW logging is disabled to not put the FW in a weird state
 	 * for the next driver load
 	 */
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 85a996ad2c1f..9c2c8637b4a7 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -5276,8 +5276,6 @@ static void ice_remove(struct pci_dev *pdev)
 		msleep(100);
 	}
 
-	ice_debugfs_exit();
-
 	if (test_bit(ICE_FLAG_SRIOV_ENA, pf->flags)) {
 		set_bit(ICE_VF_RESETS_DISABLED, pf->state);
 		ice_free_vfs(pf);
@@ -5783,6 +5781,7 @@ module_init(ice_module_init);
 static void __exit ice_module_exit(void)
 {
 	pci_unregister_driver(&ice_driver);
+	ice_debugfs_exit();
 	destroy_workqueue(ice_wq);
 	destroy_workqueue(ice_lag_wq);
 	pr_info("module unloaded\n");
-- 
2.41.0