netdev - RE: [Intel-wired-lan] [PATCH iwl-net v1] ixgbe: initialize aci.lock before it's used

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Message-ID: <IA3PR11MB898650F1DA8C2169071387CDE573A@IA3PR11MB8986.namprd11.prod.outlook.com>
Date: Tue, 17 Jun 2025 05:39:34 +0000
From: "Loktionov, Aleksandr" <aleksandr.loktionov@...el.com>
To: "Jagielski, Jedrzej" <jedrzej.jagielski@...el.com>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC: "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "Jagielski, Jedrzej" <jedrzej.jagielski@...el.com>,
	Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>, "Kitszel,
 Przemyslaw" <przemyslaw.kitszel@...el.com>
Subject: RE: [Intel-wired-lan] [PATCH iwl-net v1] ixgbe: initialize aci.lock
 before it's used



> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf
> Of Jedrzej Jagielski
> Sent: Monday, June 16, 2025 3:37 PM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: Nguyen, Anthony L <anthony.l.nguyen@...el.com>;
> netdev@...r.kernel.org; Jagielski, Jedrzej
> <jedrzej.jagielski@...el.com>; Michal Swiatkowski
> <michal.swiatkowski@...ux.intel.com>; Kitszel, Przemyslaw
> <przemyslaw.kitszel@...el.com>
> Subject: [Intel-wired-lan] [PATCH iwl-net v1] ixgbe: initialize
> aci.lock before it's used
> 
> Currently aci.lock is initialized too late. A bunch of ACI callbacks
> using the lock are called prior it's initialized.
> 
> Commit 337369f8ce9e ("locking/mutex: Add MUTEX_WARN_ON() into fast
> path") highlights that issue what results in call trace.
> 
> [    4.092899] DEBUG_LOCKS_WARN_ON(lock->magic != lock)
> [    4.092910] WARNING: CPU: 0 PID: 578 at kernel/locking/mutex.c:154
> mutex_lock+0x6d/0x80
> [    4.098757] Call Trace:
> [    4.098847]  <TASK>
> [    4.098922]  ixgbe_aci_send_cmd+0x8c/0x1e0 [ixgbe]
> [    4.099108]  ? hrtimer_try_to_cancel+0x18/0x110
> [    4.099277]  ixgbe_aci_get_fw_ver+0x52/0xa0 [ixgbe]
> [    4.099460]  ixgbe_check_fw_error+0x1fc/0x2f0 [ixgbe]
> [    4.099650]  ? usleep_range_state+0x69/0xd0
> [    4.099811]  ? usleep_range_state+0x8c/0xd0
> [    4.099964]  ixgbe_probe+0x3b0/0x12d0 [ixgbe]
> [    4.100132]  local_pci_probe+0x43/0xa0
> [    4.100267]  work_for_cpu_fn+0x13/0x20
> [    4.101647]  </TASK>
> 
> Move aci.lock mutex initialization to ixgbe_sw_init() before any ACI
> command is sent. Along with that move also related SWFW semaphore in
> order to reduce size of ixgbe_probe() and that way all locks are
> initialized in ixgbe_sw_init().
> 
> Reviewed-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
> Fixes: 4600cdf9f5ac ("ixgbe: Enable link management in E610 device")
> Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@...el.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>

> ---
>  drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 15 ++++++++-------
>  1 file changed, 8 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> index 03d31e5b131d..18cae81dc794 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> @@ -6801,6 +6801,13 @@ static int ixgbe_sw_init(struct ixgbe_adapter
> *adapter,
>  		break;
>  	}
> 
> +	/* Make sure the SWFW semaphore is in a valid state */
> +	if (hw->mac.ops.init_swfw_sync)
> +		hw->mac.ops.init_swfw_sync(hw);
> +
> +	if (hw->mac.type == ixgbe_mac_e610)
> +		mutex_init(&hw->aci.lock);
> +
>  #ifdef IXGBE_FCOE
>  	/* FCoE support exists, always init the FCoE lock */
>  	spin_lock_init(&adapter->fcoe.lock);
> @@ -11473,10 +11480,6 @@ static int ixgbe_probe(struct pci_dev *pdev,
> const struct pci_device_id *ent)
>  	if (err)
>  		goto err_sw_init;
> 
> -	/* Make sure the SWFW semaphore is in a valid state */
> -	if (hw->mac.ops.init_swfw_sync)
> -		hw->mac.ops.init_swfw_sync(hw);
> -
>  	if (ixgbe_check_fw_error(adapter))
>  		return ixgbe_recovery_probe(adapter);
> 
> @@ -11680,8 +11683,6 @@ static int ixgbe_probe(struct pci_dev *pdev,
> const struct pci_device_id *ent)
>  	ether_addr_copy(hw->mac.addr, hw->mac.perm_addr);
>  	ixgbe_mac_set_default_filter(adapter);
> 
> -	if (hw->mac.type == ixgbe_mac_e610)
> -		mutex_init(&hw->aci.lock);
>  	timer_setup(&adapter->service_timer, ixgbe_service_timer, 0);
> 
>  	if (ixgbe_removed(hw->hw_addr)) {
> @@ -11837,9 +11838,9 @@ static int ixgbe_probe(struct pci_dev *pdev,
> const struct pci_device_id *ent)
>  	devl_unlock(adapter->devlink);
>  	ixgbe_release_hw_control(adapter);
>  	ixgbe_clear_interrupt_scheme(adapter);
> +err_sw_init:
>  	if (hw->mac.type == ixgbe_mac_e610)
>  		mutex_destroy(&adapter->hw.aci.lock);
> -err_sw_init:
>  	ixgbe_disable_sriov(adapter);
>  	adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
>  	iounmap(adapter->io_addr);
> 
> base-commit: a76bd1156de9fd1d4be4502cbb5160a709ff4cd7
> --
> 2.31.1