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PCI: Make link active reporting detection generic

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The spec has timing requirements when waiting for a link to become active
after a conventional reset.  Implement those hard delays when waiting for
an active link so pciehp and dpc drivers don't need to duplicate this.

For devices that don't support data link layer active reporting, wait the
fixed time recommended by the PCIe spec.

Signed-off-by: Keith Busch <keith.busch@intel.com>
[bhelgaas: changelog]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Sinan Kaya <okaya@kernel.org>
This commit is contained in:
Keith Busch
2018-09-20 10:27:17 -06:00
committed by Bjorn Helgaas
parent a6bd101b8f
commit f0157160b3
6 changed files with 34 additions and 33 deletions
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4
drivers/pci/pcie/dpc.c
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@@ -140,10 +140,12 @@ static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev)
pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS,
PCI_EXP_DPC_STATUS_TRIGGER);
if (!pcie_wait_for_link(pdev, true))
return PCI_ERS_RESULT_DISCONNECT;
return PCI_ERS_RESULT_RECOVERED;
}
static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
{
struct device *dev = &dpc->dev->device;