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Subject[PATCH V3 4/6] PCI: Wait device ready after pci_pm_reset()
Date
Rev 3.1 Sec 2.3.1 Request Handling Rules says a device can issue CRS
following a D3hot->D0 transition. Add pci_dev_wait() call to see if
device is available before returning.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
drivers/pci/pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 736d809..09eae93 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4116,7 +4116,7 @@ static int pci_pm_reset(struct pci_dev *dev, int probe)
pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, csr);
pci_dev_d3_sleep(dev);

- return 0;
+ return pci_dev_wait(dev, "PM D3->D0", PCIE_RESET_READY_POLL_MS);
}

void pci_reset_secondary_bus(struct pci_dev *dev)
--
1.9.1
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