PCI: Simplify pci_dev_reset_slot_function()

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pci_dev_reset_slot_function() refuses to reset a hotplug slot if it is
shared by multiple pci_devs.  That's the case if and only if the slot is
occupied by a multifunction device.

Simplify the function to check the device's multifunction flag instead
of iterating over the devices on the bus.  (Iterating over the devices
requires holding pci_bus_sem, which the function erroneously does not
acquire.)

Link: https://lore.kernel.org/r/c6aab5af096f7b1b3db57f6335cebba8f0fcca89.1595330431.git.lukas@wunner.de
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Alex Williamson <alex.williamson@redhat.com>

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Lukas Wunner 2020-07-21 13:24:51 +02:00 • committed by Bjorn Helgaas

parent 8c46d543aa

commit 10791141a6

1 changed files with 1 additions and 7 deletions

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drivers/pci/pci.c

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