From 5d12fcef4ef15d00ae3228cc1ed80d2d81bc2c06 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 23 Jan 2017 11:31:31 +0000 Subject: [PATCH] drm/i915: Assert that the kernel_context is hw-id 0 For easy recognisability, we want the kernel context to have id 0 and all user contexts to have non-zero ids. Signed-off-by: Chris Wilson Reviewed-by: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/20170123113132.18665-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_gem_context.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index 17f90c618208..77458da9627d 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -451,6 +451,11 @@ int i915_gem_context_init(struct drm_i915_private *dev_priv) return PTR_ERR(ctx); } + /* For easy recognisablity, we want the kernel context to be 0 and then + * all user contexts will have non-zero hw_id. + */ + GEM_BUG_ON(ctx->hw_id); + i915_gem_context_clear_bannable(ctx); ctx->priority = I915_PRIORITY_MIN; /* lowest priority; idle task */ dev_priv->kernel_context = ctx; -- 2.20.1