From dd9c0f3cbbe6fdfe7402b9c6ea35f04b260901bf Mon Sep 17 00:00:00 2001
From: Matthew Brost <matthew.brost@intel.com>
Date: Thu, 8 Jul 2021 09:20:50 -0700
Subject: [PATCH] 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
---
drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
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 b86575b99537f..80db59b45c459 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;
--
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