On 7/21/2017 5:32 AM, Chris Wilson wrote:
During our selftests, we try reseting the GPU tens of thousands of
times, flooding the dmesg with out reset spam drowning out any potential
warnings. Add an option to i915_reset()/i915_reset_engine() to specify a
quiet reset for selftesting.

Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
  drivers/gpu/drm/i915/i915_drv.c                  | 48 +++++++++++++-----------
  drivers/gpu/drm/i915/i915_drv.h                  |  8 +++-
  drivers/gpu/drm/i915/i915_gem_request.c          |  2 +-
  drivers/gpu/drm/i915/i915_irq.c                  |  4 +-
  drivers/gpu/drm/i915/selftests/intel_hangcheck.c |  8 ++--
  5 files changed, 39 insertions(+), 31 deletions(-)

...
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 5244fb16fa55..469f854dd395 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2624,7 +2624,7 @@ static void i915_reset_device(struct drm_i915_private 
*dev_priv)
                 */
                do {
                        if (mutex_trylock(&dev_priv->drm.struct_mutex)) {
-                               i915_reset(dev_priv);
+                               i915_reset(dev_priv, 0);

I guess adding a wrapper to make flags=0 the default it's an overkill, plus I see the benefit of not flooding dmesg.

Reviewed-by: Michel Thierry <michel.thie...@intel.com>

                                mutex_unlock(&dev_priv->drm.struct_mutex);
                        }
                } while (wait_on_bit_timeout(&dev_priv->gpu_error.flags,
@@ -2739,7 +2739,7 @@ void i915_handle_error(struct drm_i915_private *dev_priv,
                                             &dev_priv->gpu_error.flags))
                                continue;
- if (i915_reset_engine(engine) == 0)
+                       if (i915_reset_engine(engine, 0) == 0)
                                engine_mask &= ~intel_engine_flag(engine);
clear_bit(I915_RESET_ENGINE + engine->id,
diff --git a/drivers/gpu/drm/i915/selftests/intel_hangcheck.c 
b/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
index e83503db3b66..4129d01b67a1 100644
--- a/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
+++ b/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
@@ -342,7 +342,7 @@ static int igt_global_reset(void *arg)
        mutex_lock(&i915->drm.struct_mutex);
        reset_count = i915_reset_count(&i915->gpu_error);
- i915_reset(i915);
+       i915_reset(i915, I915_RESET_QUIET);
if (i915_reset_count(&i915->gpu_error) == reset_count) {
                pr_err("No GPU reset recorded!\n");
@@ -378,7 +378,7 @@ static int igt_reset_engine(void *arg)
                reset_engine_count = i915_reset_engine_count(&i915->gpu_error,
                                                             engine);
- err = i915_reset_engine(engine);
+               err = i915_reset_engine(engine, I915_RESET_QUIET);
                if (err) {
                        pr_err("i915_reset_engine failed\n");
                        break;
@@ -512,7 +512,7 @@ static int igt_reset_active_engines(void *arg)
set_bit(I915_RESET_ENGINE + engine->id, &i915->gpu_error.flags);
                do {
-                       err = i915_reset_engine(engine);
+                       err = i915_reset_engine(engine, I915_RESET_QUIET);
                        if (err) {
                                pr_err("i915_reset_engine(%s) failed, err=%d\n",
                                       engine->name, err);
@@ -716,7 +716,7 @@ static int igt_reset_queue(void *arg)
reset_count = fake_hangcheck(prev); - i915_reset(i915);
+                       i915_reset(i915, I915_RESET_QUIET);
GEM_BUG_ON(test_bit(I915_RESET_HANDOFF,
                                            &i915->gpu_error.flags));

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