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Francisco MunozandGreg Kroah-Hartman
38c1d5d2f8
[ Upstream commit0a584655ef] The reset was never applied in the current implementation because Intel Bridges owned by VMD are parentless. Internally, pci_reset_bus() applies a reset to the parent of the PCI device supplied as argument, but in this case it failed because there wasn't a parent. In more detail, this change allows the VMD driver to enumerate NVMe devices in pass-through configurations when guest reboots are performed. There was an attempted to fix this, but later we discovered that the code inside pci_reset_bus() wasn’t triggering secondary bus resets. Therefore, we updated the parameters passed to it, and now NVMe SSDs attached to VMD bridges are properly enumerated in VT-d pass-through scenarios. Link: https://lore.kernel.org/r/20221206001637.4744-1-francisco.munoz.ruiz@linux.intel.com Fixes:6aab562229("PCI: vmd: Clean up domain before enumeration") Signed-off-by: Francisco Munoz <francisco.munoz.ruiz@linux.intel.com> Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> Reviewed-by: Nirmal Patel <nirmal.patel@linux.intel.com> Reviewed-by: Jonathan Derrick <jonathan.derrick@linux.dev> Signed-off-by: Sasha Levin <sashal@kernel.org>