[v6,8/9] PCI/DPC: Update comments related to DPC recovery on NON_FATAL errors
diff mbox series

Message ID d7fa20afe23639c1e2fe224bd4cdbf8e3ba70003.1564177080.git.sathyanarayanan.kuppuswamy@linux.intel.com
State Superseded
Delegated to: Bjorn Helgaas
Headers show
Series
  • Add Error Disconnect Recover (EDR) support
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Commit Message

Kuppuswamy Sathyanarayanan July 26, 2019, 9:43 p.m. UTC
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

Currently, in native mode, DPC driver is configured to trigger DPC only
for FATAL errors and hence it only supports port recovery for FATAL
errors. But with Error Disconnect Recover (EDR) support, DPC
configuration is done by firmware, and hence we should expect DPC
triggered for both FATAL/NON_FATAL errors. So update comments and add
details about how NON_FATAL dpc recovery is handled.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---
 drivers/pci/pcie/dpc.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Patch
diff mbox series

diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index 6e350149d793..369df422692f 100644
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -275,7 +275,11 @@  static void dpc_process_error(struct dpc_dev *dpc)
 		pci_aer_clear_fatal_status(pdev);
 	}
 
-	/* We configure DPC so it only triggers on ERR_FATAL */
+	/*
+	 * Irrespective of whether the DPC event is triggered by
+	 * ERR_FATAL or ERR_NONFATAL, since the link is already down,
+	 * use the FATAL error recovery path for both cases.
+	 */
 	pcie_do_recovery(pdev, pci_channel_io_frozen, PCIE_PORT_SERVICE_DPC);
 }