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-rw-r--r--drivers/gpu/drm/i915/i915_gem_gtt.c5
-rw-r--r--drivers/gpu/drm/i915/i915_gpu_error.c15
-rw-r--r--drivers/gpu/drm/i915/i915_gpu_error.h8
3 files changed, 26 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 47c302543799..07999fe09ad2 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -3413,6 +3413,11 @@ static int gen8_gmch_probe(struct i915_ggtt *ggtt)
ggtt->vm.insert_page = bxt_vtd_ggtt_insert_page__BKL;
if (ggtt->vm.clear_range != nop_clear_range)
ggtt->vm.clear_range = bxt_vtd_ggtt_clear_range__BKL;
+
+ /* Prevent recursively calling stop_machine() and deadlocks. */
+ dev_info(dev_priv->drm.dev,
+ "Disabling error capture for VT-d workaround\n");
+ i915_disable_error_state(dev_priv, -ENODEV);
}
ggtt->invalidate = gen6_ggtt_invalidate;
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 8762d17b6659..3eb33e000d6f 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -648,6 +648,9 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
return 0;
}
+ if (IS_ERR(error))
+ return PTR_ERR(error);
+
if (*error->error_msg)
err_printf(m, "%s\n", error->error_msg);
err_printf(m, "Kernel: " UTS_RELEASE "\n");
@@ -1859,6 +1862,7 @@ void i915_capture_error_state(struct drm_i915_private *i915,
error = i915_capture_gpu_state(i915);
if (!error) {
DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
+ i915_disable_error_state(i915, -ENOMEM);
return;
}
@@ -1914,5 +1918,14 @@ void i915_reset_error_state(struct drm_i915_private *i915)
i915->gpu_error.first_error = NULL;
spin_unlock_irq(&i915->gpu_error.lock);
- i915_gpu_state_put(error);
+ if (!IS_ERR(error))
+ i915_gpu_state_put(error);
+}
+
+void i915_disable_error_state(struct drm_i915_private *i915, int err)
+{
+ spin_lock_irq(&i915->gpu_error.lock);
+ if (!i915->gpu_error.first_error)
+ i915->gpu_error.first_error = ERR_PTR(err);
+ spin_unlock_irq(&i915->gpu_error.lock);
}
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.h b/drivers/gpu/drm/i915/i915_gpu_error.h
index 8710fb18ed74..3ec89a504de5 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.h
+++ b/drivers/gpu/drm/i915/i915_gpu_error.h
@@ -343,6 +343,7 @@ static inline void i915_gpu_state_put(struct i915_gpu_state *gpu)
struct i915_gpu_state *i915_first_error_state(struct drm_i915_private *i915);
void i915_reset_error_state(struct drm_i915_private *i915);
+void i915_disable_error_state(struct drm_i915_private *i915, int err);
#else
@@ -355,13 +356,18 @@ static inline void i915_capture_error_state(struct drm_i915_private *dev_priv,
static inline struct i915_gpu_state *
i915_first_error_state(struct drm_i915_private *i915)
{
- return NULL;
+ return ERR_PTR(-ENODEV);
}
static inline void i915_reset_error_state(struct drm_i915_private *i915)
{
}
+static inline void i915_disable_error_state(struct drm_i915_private *i915,
+ int err)
+{
+}
+
#endif /* IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) */
#endif /* _I915_GPU_ERROR_H_ */