PCI: vmd: Clean up domain before enumeration

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During VT-d pass-through, the VMD driver occasionally fails to
enumerate underlying NVMe devices when repetitive reboots are
performed in the guest OS. The issue can be resolved by resetting
VMD root ports for proper enumeration and triggering secondary bus
reset which will also propagate reset through downstream bridges.

Link: https://lore.kernel.org/r/20211116221136.85134-1-nirmal.patel@linux.intel.com
Signed-off-by: Nirmal Patel <nirmal.patel@linux.intel.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Jon Derrick <jonathan.derrick@linux.dev>

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Nirmal Patel 2021-11-16 15:11:36 -07:00 • committed by Lorenzo Pieralisi

parent fa55b7dcdc

commit 6aab562229

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drivers/pci/controller/vmd.c

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