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PCI/portdrv: Report reset for frozen channel

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The PCI error recovery always resets the link for a frozen state, so the
port driver should return that a reset is required for its result. This
will get the .slot_reset() callback invoked, which is necessary to
restore the port's config space. Without this, the driver had been
relying on downstream drivers to return this status.

Link: https://lore.kernel.org/r/[email protected]
Tested-by: Hedi Berriche <[email protected]>
Signed-off-by: Keith Busch <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Acked-by: Hedi Berriche <[email protected]>
This commit is contained in:
Keith Busch authored and Bjorn Helgaas committed 2021-02-23 17:10:42 -06:00
1 parent 33ac78bd3b
commit ba952824e6
1 file changed
+2 -1
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drivers/pci/pcie/portdrv_pci.c
+2 -1
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@@ -153,7 +153,8 @@ static void pcie_portdrv_remove(struct pci_dev *dev)
static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev,
pci_channel_state_t error)
{
/* Root Port has no impact. Always recovers. */
if (error == pci_channel_io_frozen)
return PCI_ERS_RESULT_NEED_RESET;
return PCI_ERS_RESULT_CAN_RECOVER;
}