FAILED: patch "[PATCH] drm/i915: Never return 0 if not all requests retired" failed to apply to 5.10-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

Possible dependencies:

35aba5f51a39 ("drm/i915: Never return 0 if not all requests retired")
b97060a99b01 ("drm/i915/guc: Update intel_gt_wait_for_idle to work with GuC")
f4eb1f3fe946 ("drm/i915/guc: Ensure G2H response has space in buffer")
e0717063ccb4 ("drm/i915/guc: Defer context unpin until scheduling is disabled")
3a4cdf1982f0 ("drm/i915/guc: Implement GuC context operations for new inteface")
925dc1cf58ed ("drm/i915/guc: Implement GuC submission tasklet")
27213d79b384 ("drm/i915/guc: Add LRC descriptor context lookup array")
7518d9b67cf5 ("drm/i915/guc: Remove GuC stage descriptor, add LRC descriptor")
56bc88745e73 ("drm/i915/guc: Add new GuC interface defines and structures")
75452167a279 ("drm/i915/guc: Optimize CTB writes and reads")
b43b9950486e ("drm/i915/guc: Add stall timer to non blocking CTB send function")
1681924d8bde ("drm/i915/guc: Add non blocking CTB send function")
c26e289f1d8d ("drm/i915/guc: Increase size of CTB buffers")
572f2a5cd974 ("drm/i915/guc: Update firmware to v62.0.0")
22916bad07a5 ("drm/i915: Move submission tasklet to i915_sched_engine")
d2a31d026492 ("drm/i915: Update i915_scheduler to operate on i915_sched_engine")
71ed60112d5d ("drm/i915: Add kick_backend function to i915_sched_engine")
3f623e06cd56 ("drm/i915: Move engine->schedule to i915_sched_engine")
349a2bc5aae4 ("drm/i915: Move active tracking to i915_sched_engine")
c4fd7d8cc3ca ("drm/i915: Reset sched_engine.no_priolist immediately after dequeue")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 35aba5f51a39fb95351844ffb14ec02b8970e19f Mon Sep 17 00:00:00 2001
From: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
Date: Mon, 21 Nov 2022 15:56:55 +0100
Subject: [PATCH] drm/i915: Never return 0 if not all requests retired

Users of intel_gt_retire_requests_timeout() expect 0 return value on
success.  However, we have no protection from passing back 0 potentially
returned by a call to dma_fence_wait_timeout() when it succedes right
after its timeout has expired.

Replace 0 with -ETIME before potentially using the timeout value as return
code, so -ETIME is returned if there are still some requests not retired
after timeout, 0 otherwise.

v3: Use conditional expression, more compact but also better reflecting
    intention standing behind the change.

v2: Move the added lines down so flush_submission() is not affected.

Fixes: f33a8a51602c ("drm/i915: Merge wait_for_timelines with retire_request")
Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: stable@vger.kernel.org # v5.5+
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221121145655.75141-3-janusz.krzysztofik@linux.intel.com
(cherry picked from commit f301a29f143760ce8d3d6b6a8436d45d3448cde6)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/i915/gt/intel_gt_requests.c b/drivers/gpu/drm/i915/gt/intel_gt_requests.c
index edb881d75630..1dfd01668c79 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_requests.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_requests.c
@@ -199,7 +199,7 @@ out_active:	spin_lock(&timelines->lock);
 	if (remaining_timeout)
 		*remaining_timeout = timeout;
 
-	return active_count ? timeout : 0;
+	return active_count ? timeout ?: -ETIME : 0;
 }
 
 static void retire_work_handler(struct work_struct *work)