drm/i915/guc: Skip communication warning on reset in progress

[ Upstream commit 1696b0cfcf004a3af34ffe4c57a14e837ef18144 ]

GuC IRQ and tasklet handler receive just single G2H message, and let other
messages to be received from next tasklet. During this chained tasklet
process, if reset process started, communication will be disabled.
Skip warning for this condition.

Fixes: 65dd4ed0f4e1 ("drm/i915/guc: Don't receive all G2H messages in irq handler")
Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/15018
Signed-off-by: Zhanjun Dong <zhanjun.dong@intel.com>
Reviewed-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://lore.kernel.org/r/20250929152904.269776-1-zhanjun.dong@intel.com
(cherry picked from commit 604b5ee4a653a70979ce689dbd6a5d942eb016bf)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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 0d5197c0824a91b5e923a2ac72a9ebea65ecfc48..5cf3a516ccfb385b926570a6c1a8e623216f3e63 100644 (file)
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
@@ -1324,9 +1324,16 @@ static int ct_receive(struct intel_guc_ct *ct)
 
 static void ct_try_receive_message(struct intel_guc_ct *ct)
 {
+       struct intel_guc *guc = ct_to_guc(ct);
        int ret;
 
-       if (GEM_WARN_ON(!ct->enabled))
+       if (!ct->enabled) {
+               GEM_WARN_ON(!guc_to_gt(guc)->uc.reset_in_progress);
+               return;
+       }
+
+       /* When interrupt disabled, message handling is not expected */
+       if (!guc->interrupts.enabled)
                return;
 
        ret = ct_receive(ct);