From: Matthew Brost <matthew.brost@intel.com>
Date: Thu, 8 Jul 2021 16:20:50 +0000 (-0700)
Subject: drm/i915/guc: Improve error message for unsolicited CT response
X-Git-Tag: microblaze-v5.16~33^2~16^2~149
X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=dd9c0f3cbbe6fdfe7402b9c6ea35f04b260901bf;p=linux-2.6-microblaze.git

drm/i915/guc: Improve error message for unsolicited CT response

Improve the error message when a unsolicited CT response is received by
printing fence that couldn't be found, the last fence, and all requests
with a response outstanding.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210708162055.129996-3-matthew.brost@intel.com
---

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
index b86575b99537..80db59b45c45 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
@@ -732,12 +732,16 @@ static int ct_handle_response(struct intel_guc_ct *ct, struct ct_incoming_msg *r
 		found = true;
 		break;
 	}
-	spin_unlock_irqrestore(&ct->requests.lock, flags);
-
 	if (!found) {
 		CT_ERROR(ct, "Unsolicited response (fence %u)\n", fence);
-		return -ENOKEY;
+		CT_ERROR(ct, "Could not find fence=%u, last_fence=%u\n", fence,
+			 ct->requests.last_fence);
+		list_for_each_entry(req, &ct->requests.pending, link)
+			CT_ERROR(ct, "request %u awaits response\n",
+				 req->fence);
+		err = -ENOKEY;
 	}
+	spin_unlock_irqrestore(&ct->requests.lock, flags);
 
 	if (unlikely(err))
 		return err;