ixgbe: initialize aci.lock before it's used
authorJedrzej Jagielski <jedrzej.jagielski@intel.com>
Mon, 8 Sep 2025 11:26:28 +0000 (13:26 +0200)
committerTony Nguyen <anthony.l.nguyen@intel.com>
Tue, 16 Sep 2025 21:01:53 +0000 (14:01 -0700)
commitb85936e95a4bd2a07e134af71e2c0750a69d2b8b
tree9e959d00cb7e98b083089d2abc6170b297bbfce3
parente37084a26070c546ae7961ee135bbfb15fbe13fd
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@linux.intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Fixes: 4600cdf9f5ac ("ixgbe: Enable link management in E610 device")
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Rinitha S <sx.rinitha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c