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3cda505a67
Right now, igc_ptp_reset() is called from igc_reset(), which is called
from igc_probe() before igc_ptp_init() has a chance to run. It is
detected as an attempt to use an spinlock without registering its key
first. See log below.
To avoid this problem, simplify the initialization: igc_ptp_init() is
only called from igc_probe(), and igc_ptp_reset() is only called from
igc_reset().
[ 2.736332] INFO: trying to register non-static key.
[ 2.736902] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input10
[ 2.737513] the code is fine but needs lockdep annotation.
[ 2.737513] turning off the locking correctness validator.
[ 2.737515] CPU: 8 PID: 239 Comm: systemd-udevd Tainted: G E 5.8.0-rc7+ #13
[ 2.737515] Hardware name: Gigabyte Technology Co., Ltd. Z390 AORUS ULTRA/Z390 AORUS ULTRA-CF, BIOS F7 03/14/2019
[ 2.737516] Call Trace:
[ 2.737521] dump_stack+0x78/0xa0
[ 2.737524] register_lock_class+0x6b1/0x6f0
[ 2.737526] ? lockdep_hardirqs_on_prepare+0xca/0x160
[ 2.739177] ? _raw_spin_unlock_irq+0x24/0x50
[ 2.739179] ? trace_hardirqs_on+0x1c/0xf0
[ 2.740820] __lock_acquire+0x56/0x1ff0
[ 2.740823] ? __schedule+0x30c/0x970
[ 2.740825] lock_acquire+0x97/0x3e0
[ 2.740830] ? igc_ptp_reset+0x35/0xf0 [igc]
[ 2.740833] ? schedule_hrtimeout_range_clock+0xb7/0x120
[ 2.742507] _raw_spin_lock_irqsave+0x3a/0x50
[ 2.742512] ? igc_ptp_reset+0x35/0xf0 [igc]
[ 2.742515] igc_ptp_reset+0x35/0xf0 [igc]
[ 2.742519] igc_reset+0x96/0xd0 [igc]
[ 2.744148] igc_probe+0x68f/0x7d0 [igc]
[ 2.745796] local_pci_probe+0x3d/0x70
[ 2.745799] pci_device_probe+0xd1/0x190
[ 2.745802] really_probe+0x15a/0x3f0
[ 2.759936] driver_probe_device+0xe1/0x150
[ 2.759937] device_driver_attach+0xa8/0xb0
[ 2.761786] __driver_attach+0x89/0x150
[ 2.761786] ? device_driver_attach+0xb0/0xb0
[ 2.761787] ? device_driver_attach+0xb0/0xb0
[ 2.761788] bus_for_each_dev+0x66/0x90
[ 2.765012] bus_add_driver+0x12e/0x1f0
[ 2.765716] driver_register+0x8b/0xe0
[ 2.766418] ? 0xffffffffc0230000
[ 2.767119] do_one_initcall+0x5a/0x310
[ 2.767826] ? kmem_cache_alloc_trace+0xe9/0x200
[ 2.768528] do_init_module+0x5c/0x260
[ 2.769206] __do_sys_finit_module+0x93/0xe0
[ 2.770048] do_syscall_64+0x46/0xa0
[ 2.770716] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 2.771396] RIP: 0033:0x7f83534589e0
[ 2.772073] Code: 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 2e 2e 2e 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 80 24 0d 00 f7 d8 64 89 01 48
[ 2.772074] RSP: 002b:00007ffd31d0ed18 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 2.774854] RAX: ffffffffffffffda RBX: 000055d52816aba0 RCX: 00007f83534589e0
[ 2.774855] RDX: 0000000000000000 RSI: 00007f83535b982f RDI: 0000000000000006
[ 2.774855] RBP: 00007ffd31d0ed60 R08: 0000000000000000 R09: 00007ffd31d0ed30
[ 2.774856] R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000
[ 2.774856] R13: 0000000000020000 R14: 00007f83535b982f R15: 000055d527f5e120
Fixes: 5f2958052c ("igc: Add basic skeleton for PTP")
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Reviewed-by: Andre Guedes <andre.guedes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
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https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.