Commit 4caf2511ec ("thunderbolt: Add trivial .shutdown") exposes a bug
in the Thunderbolt driver, that frees an unallocated id, resulting in the
following spinlock bad magic bug.
[ 20.633803] BUG: spinlock bad magic on CPU#4, halt/3313
[ 20.640030] lock: 0xffff92e6ad5c97e0, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
[ 20.672139] Call Trace:
[ 20.675032] dump_stack+0x97/0xdb
[ 20.678950] ? spin_bug+0xa5/0xb0
[ 20.682865] do_raw_spin_lock+0x68/0x98
[ 20.687397] _raw_spin_lock_irqsave+0x3f/0x5d
[ 20.692535] ida_destroy+0x4f/0x124
[ 20.696657] tb_switch_release+0x6d/0xfd
[ 20.701295] device_release+0x2c/0x7d
[ 20.705622] kobject_put+0x8e/0xac
[ 20.709637] tb_stop+0x55/0x66
[ 20.713243] tb_domain_remove+0x36/0x62
[ 20.717774] nhi_remove+0x4d/0x58
Fix the issue by disabling ports that are enabled as per the EEPROM, but
not implemented. While at it, update the kernel doc for the disabled
field, to reflect this.
Cc: stable@vger.kernel.org
Fixes: 4caf2511ec ("thunderbolt: Add trivial .shutdown")
Reported-by: Srikanth Nandamuri <srikanth.nandamuri@intel.com>
Signed-off-by: Nikunj A. Dadhania <nikunj.dadhania@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
8824d19b45