usb: typec: ucsi: split connector lock classes

Lockdep detects a possible recursive locking scenario during
ucsi init:

[    5.418616] ============================================
[    5.418634] WARNING: possible recursive locking detected
[    5.418706] --------------------------------------------
[    5.418725] kworker/4:1/82 is trying to acquire lock:
[    5.418759] ffff888119a34648 (&con->lock){+.+.}-{3:3}, at: ucsi_init_work+0x1a78/0x2eb0 [typec_ucsi]
[    5.418801]
               but task is already holding lock:
[    5.418835] ffff888119a34080 (&con->lock){+.+.}-{3:3}, at: ucsi_init_work+0x1a78/0x2eb0 [typec_ucsi]
[    5.418884]
               other info that might help us debug this:
[    5.418904]  Possible unsafe locking scenario:

[    5.418937]        CPU0
[    5.418956]        ----
[    5.418991]   lock(&con->lock);
[    5.419013]   lock(&con->lock);
[    5.419033]
                *** DEADLOCK ***

[    5.419387] Call Trace:
[    5.419406]  <TASK>
[    5.419425]  dump_stack_lvl+0x61/0xa0
[    5.419448]  print_deadlock_bug+0x4a6/0x650
[    5.419483]  __lock_acquire+0x62b6/0x7f50
[    5.419507]  lock_acquire+0x11b/0x390
[    5.419654]  __mutex_lock+0xbc/0xcd0
[    5.419741]  ucsi_init_work+0x1a78/0x2eb0
[    5.419785]  ? worker_thread+0xf53/0x2bc0
[    5.419819]  worker_thread+0xff4/0x2bc0
[    5.419842]  kthread+0x2a7/0x330
[    5.419863]  ? __pfx_worker_thread+0x10/0x10
[    5.419896]  ? __pfx_kthread+0x10/0x10
[    5.419916]  ret_from_fork+0x38/0x70
[    5.419936]  ? __pfx_kthread+0x10/0x10
[    5.419969]  ret_from_fork_asm+0x1b/0x30
[    5.419991]  </TASK>
[    5.420009] ---[ end trace 0000000000000000 ]---

The problem is that all connector locks belong to the same
lockdep lock class, so the following loop:

	for (i = 0; i < ucsi->cap.num_connectors; i++)
		ucsi_register_port(connector[i])
			mutex_lock(&connector[i]->lock)

looks like a recursive acquire of the same mutex.  Put each connector
lock into a dedicated lock class so that lockdep doesn't see it as a
possible recursion.

Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260515060042.136083-1-senozhatsky@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions