[PATCH v2] drm/xe/pci_error: Allow debugging PCI errors

XE_WEDGED_MODE_UPON_ANY_HANG_NO_RESET is intended for debugging hangs.
Disconnect the device on AER and prevent bus reset, so that it is available
to the user for debugging.

Signed-off-by: Raag Jadav <[email protected]>
---
v2: Process errors before wedging (Riana)
---
 drivers/gpu/drm/xe/xe_pci_error.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_pci_error.c b/drivers/gpu/drm/xe/xe_pci_error.c
index fb965f52be5e..79ce0c671549 100644
--- a/drivers/gpu/drm/xe/xe_pci_error.c
+++ b/drivers/gpu/drm/xe/xe_pci_error.c
@@ -84,6 +84,12 @@ static pci_ers_result_t xe_pci_error_mmio_enabled(struct pci_dev *pdev)
 	xe_info(xe, "PCI error: MMIO enabled\n");
 	action = xe_ras_process_errors(xe);
 
+	/* User wants to debug the error, prevent reset */
+	if (xe->wedged.mode == XE_WEDGED_MODE_UPON_ANY_HANG_NO_RESET) {
+		xe_device_declare_wedged(xe);
+		return PCI_ERS_RESULT_DISCONNECT;
+	}
+
 	return ras_action_to_pci_result(pdev, action);
 }
 
-- 
2.43.0