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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2019-10-14 13:13:36 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-10-14 21:10:59 +0100 |
| commit | 3c00660db18371c632adae4836ed2b2d3d78ecb6 (patch) | |
| tree | a81f26db4aef103e46d9504b85e3352e72eb0725 /drivers/gpu/drm/i915/i915_gem.h | |
| parent | drm/i915/ehl: Port C's hotplug interrupt is associated with TC1 bits (diff) | |
| download | linux-dev-3c00660db18371c632adae4836ed2b2d3d78ecb6.tar.xz linux-dev-3c00660db18371c632adae4836ed2b2d3d78ecb6.zip | |
drm/i915/execlists: Assert tasklet is locked for process_csb()
We rely on only the tasklet being allowed to call into process_csb(), so
assert that is locked when we do. As the tasklet uses a simple bitlock,
there is no strong lockdep checking so we must make do with a plain
assertion that the tasklet is running and assume that we are the
tasklet!
v2: Fixup intel_gt_sanitize() to prepare each engine for the reset so
that the locks are marked as held during the reset
v3: Check for existent function pointers for very early sanitisation.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191014121336.30137-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.h b/drivers/gpu/drm/i915/i915_gem.h index db20d2b0842b..f6f9675848b8 100644 --- a/drivers/gpu/drm/i915/i915_gem.h +++ b/drivers/gpu/drm/i915/i915_gem.h @@ -86,6 +86,11 @@ static inline void tasklet_lock(struct tasklet_struct *t) cpu_relax(); } +static inline bool tasklet_is_locked(const struct tasklet_struct *t) +{ + return test_bit(TASKLET_STATE_RUN, &t->state); +} + static inline void __tasklet_disable_sync_once(struct tasklet_struct *t) { if (!atomic_fetch_inc(&t->count)) |