PCI: Avoid slot reset if bridge itself is broken

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When checking to see if a PCI slot can safely be reset, we previously
checked to see if any of the children had their PCI_DEV_FLAGS_NO_BUS_RESET
flag set.

Some PCIe root port bridges do not behave well after a slot reset, and may
cause the device in the slot to become unusable.

Add a check for PCI_DEV_FLAGS_NO_BUS_RESET being set in the bridge device
to prevent the slot from being reset.

Signed-off-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>

...

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Jan Glauber 2017-09-08 10:10:33 +02:00 • committed by Bjorn Helgaas

parent 357027786f

commit 33ba90aa4d

1 changed files with 4 additions and 0 deletions

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drivers/pci/pci.c

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