[PATCH 2/2] drm/xe: Avoid touching consumer fields in GuC pagefault ack

[Matthew Brost <matthew.brost@intel.com>]

The GuC pagefault acknowledgement code is designed to extract the fields
needed for the acknowledgement from the producer-stored message so that
the consumer fields can be overloaded to return additional information.
The ASID is stored in the producer message; extract it from there to
future‑proof this logic.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/xe/xe_guc_pagefault.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_guc_pagefault.c b/drivers/gpu/drm/xe/xe_guc_pagefault.c
index 1166b0a5fa21..d48f6ed103bb 100644
--- a/drivers/gpu/drm/xe/xe_guc_pagefault.c
+++ b/drivers/gpu/drm/xe/xe_guc_pagefault.c
@@ -17,6 +17,7 @@ static void guc_ack_fault(struct xe_pagefault *pf, int err)
 	u32 pdata = FIELD_GET(PFD_PDATA_LO, pf->producer.msg[0]) |
 		(FIELD_GET(PFD_PDATA_HI, pf->producer.msg[1]) <<
 		 PFD_PDATA_HI_SHIFT);
+	u32 asid = FIELD_GET(PFD_ASID, pf->producer.msg[1]);
 	u32 action[] = {
 		XE_GUC_ACTION_PAGE_FAULT_RES_DESC,
 
@@ -24,7 +25,7 @@ static void guc_ack_fault(struct xe_pagefault *pf, int err)
 		FIELD_PREP(PFR_SUCCESS, !!err) |
 		FIELD_PREP(PFR_REPLY, PFR_ACCESS) |
 		FIELD_PREP(PFR_DESC_TYPE, FAULT_RESPONSE_DESC) |
-		FIELD_PREP(PFR_ASID, pf->consumer.asid),
+		FIELD_PREP(PFR_ASID, asid),
 
 		FIELD_PREP(PFR_VFID, vfid) |
 		FIELD_PREP(PFR_ENG_INSTANCE, engine_instance) |
-- 
2.34.1