PCI/PME: Restore pcie_pme_driver.remove
In addition to making PME non-modular,
d7def2040077 ("PCI/PME: Make
explicitly non-modular") removed the pcie_pme_driver .remove() method,
pcie_pme_remove().
pcie_pme_remove() freed the PME IRQ that was requested in pci_pme_probe().
The fact that we don't free the IRQ after
d7def2040077 causes the following
crash when removing a PCIe port device via /sys:
------------[ cut here ]------------
kernel BUG at drivers/pci/msi.c:370!
invalid opcode: 0000 [#1] SMP
Modules linked in:
CPU: 1 PID: 14509 Comm: sh Tainted: G W
4.8.0-rc1-yh-00012-gd29438d
RIP: 0010:[<
ffffffff9758bbf5>] free_msi_irqs+0x65/0x190
...
Call Trace:
[<
ffffffff9758cda4>] pci_disable_msi+0x34/0x40
[<
ffffffff97583817>] cleanup_service_irqs+0x27/0x30
[<
ffffffff97583e9a>] pcie_port_device_remove+0x2a/0x40
[<
ffffffff97584250>] pcie_portdrv_remove+0x40/0x50
[<
ffffffff97576d7b>] pci_device_remove+0x4b/0xc0
[<
ffffffff9785ebe6>] __device_release_driver+0xb6/0x150
[<
ffffffff9785eca5>] device_release_driver+0x25/0x40
[<
ffffffff975702e4>] pci_stop_bus_device+0x74/0xa0
[<
ffffffff975704ea>] pci_stop_and_remove_bus_device_locked+0x1a/0x30
[<
ffffffff97578810>] remove_store+0x50/0x70
[<
ffffffff9785a378>] dev_attr_store+0x18/0x30
[<
ffffffff97260b64>] sysfs_kf_write+0x44/0x60
[<
ffffffff9725feae>] kernfs_fop_write+0x10e/0x190
[<
ffffffff971e13f8>] __vfs_write+0x28/0x110
[<
ffffffff970b0fa4>] ? percpu_down_read+0x44/0x80
[<
ffffffff971e53a7>] ? __sb_start_write+0xa7/0xe0
[<
ffffffff971e53a7>] ? __sb_start_write+0xa7/0xe0
[<
ffffffff971e1f04>] vfs_write+0xc4/0x180
[<
ffffffff971e3089>] SyS_write+0x49/0xa0
[<
ffffffff97001a46>] do_syscall_64+0xa6/0x1b0
[<
ffffffff9819201e>] entry_SYSCALL64_slow_path+0x25/0x25
...
RIP [<
ffffffff9758bbf5>] free_msi_irqs+0x65/0x190
RSP <
ffff89ad3085bc48>
---[ end trace
f4505e1dac5b95d3 ]---
Segmentation fault
Restore pcie_pme_remove().
[bhelgaas: changelog]
Fixes: d7def2040077 ("PCI/PME: Make explicitly non-modular")
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
CC: stable@vger.kernel.org # v4.9+