[PATCH v1] 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]>
---
 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 e41af2ac7f23..4858ce2f9c19 100644
--- a/drivers/gpu/drm/xe/xe_pci_error.c
+++ b/drivers/gpu/drm/xe/xe_pci_error.c
@@ -63,6 +63,12 @@ static pci_ers_result_t xe_pci_error_detected(struct pci_dev *pdev, pci_channel_
 	if (xe_survivability_mode_is_boot_enabled(xe) || xe_device_wedged(xe))
 		return PCI_ERS_RESULT_DISCONNECT;
 
+	/* 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;
+	}
+
 	switch (state) {
 	case pci_channel_io_normal:
 		return PCI_ERS_RESULT_CAN_RECOVER;
-- 
2.43.0