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

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

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 380a11c92d632a66b122ed30447b6729a3781fca..5441d2201d19aec236ec8a000ec22ea9205ac968 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);