[PATCHv2 5/5] PCI/portdrv: Report reset for frozen channel

[Keith Busch <kbusch@kernel.org>]

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.

Signed-off-by: Keith Busch <kbusch@kernel.org>
---
 drivers/pci/pcie/portdrv_pci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
index 0b250bc5f405..de141bfb0bc2 100644
--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c
@@ -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;
 }
 
-- 
2.24.1