diff options
| author | Keith Busch <keith.busch@intel.com> | 2018-09-20 19:27:07 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2018-09-21 00:06:18 +0300 |
| commit | 874b3251113a1e2cbe79c24994dc03fe4fe4b99b (patch) | |
| tree | 21dc0001d4f94374f306dd64f4fe7e10bbefc75e | |
| parent | c29de84149aba5f74e87b6491c13ac7203c12f55 (diff) | |
| download | linux-874b3251113a1e2cbe79c24994dc03fe4fe4b99b.tar.xz | |
PCI: portdrv: Restore PCI config state on slot reset
The port's config space may be cleared after a link reset, which wipes out
the bridge's bus and memory windows. Restore the config space that was
saved during probe so we can access downstream devices.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Sinan Kaya <okaya@kernel.org>
| -rw-r--r-- | drivers/pci/pcie/portdrv_pci.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c index 23a5a0c2c3fe..17256733fa43 100644 --- a/drivers/pci/pcie/portdrv_pci.c +++ b/drivers/pci/pcie/portdrv_pci.c @@ -146,6 +146,13 @@ static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev, return PCI_ERS_RESULT_CAN_RECOVER; } +static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev) +{ + pci_restore_state(dev); + pci_save_state(dev); + return PCI_ERS_RESULT_RECOVERED; +} + static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev) { return PCI_ERS_RESULT_RECOVERED; @@ -185,6 +192,7 @@ static const struct pci_device_id port_pci_ids[] = { { static const struct pci_error_handlers pcie_portdrv_err_handler = { .error_detected = pcie_portdrv_error_detected, + .slot_reset = pcie_portdrv_slot_reset, .mmio_enabled = pcie_portdrv_mmio_enabled, .resume = pcie_portdrv_err_resume, }; |