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PCI: Wait for device to become ready after secondary bus reset 

Setting Secondary Bus Reset of a downstream port sends a hot reset.  PCIe
r4.0, sec 2.3.1, Request Handling Rules, indicates that a device can return
CRS Completion Status following such a reset.  Wait until the device
becomes ready in that situation.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sinan Kaya 2018-02-27 14:14:12 -06:00 committed by Bjorn Helgaas
parent 01fd61c0b9
commit 6b2f1351af
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/pci.c
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@ -4233,7 +4233,7 @@ int pci_reset_bridge_secondary_bus(struct pci_dev *dev)
{ {
pcibios_reset_secondary_bus(dev); pcibios_reset_secondary_bus(dev);
return 0; return pci_dev_wait(dev, "bus reset", PCIE_RESET_READY_POLL_MS);
} }
EXPORT_SYMBOL_GPL(pci_reset_bridge_secondary_bus); EXPORT_SYMBOL_GPL(pci_reset_bridge_secondary_bus);