diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2011-09-08 14:00:22 +0200 |
|---|---|---|
| committer | Eugeni Dodonov <eugeni.dodonov@intel.com> | 2012-02-08 18:23:15 -0200 |
| commit | 91c17b44d207ce5b72863f794f316495103b654f (patch) | |
| tree | 55035bda004d4624ba99b4eab4b5cb5ed9349dfa | |
| parent | d350ffb7767acccb37313e51890ac9ca44359270 (diff) | |
drm/i915: properly cancel rps_work on module unload v2
The rps disabling code wasn't properly cancelling outstanding work
items. Also add a comment that explains why we're not racing with
the work item that could unmask interrupts - that piece of code
confused me quite a bit.
v2: Ben Widawsky pointed out that the first patch would deadlock
(and a few lesser problems). All corrected.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 837afcd36aa..448baf7e1b3 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7693,6 +7693,10 @@ void gen6_disable_rps(struct drm_device *dev) I915_WRITE(GEN6_RPNSWREQ, 1 << 31); I915_WRITE(GEN6_PMINTRMSK, 0xffffffff); I915_WRITE(GEN6_PMIER, 0); + /* Complete PM interrupt masking here doesn't race with the rps work + * item again unmasking PM interrupts because that is using a different + * register (PMIMR) to mask PM interrupts. The only risk is in leaving + * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */ spin_lock_irq(&dev_priv->rps_lock); dev_priv->pm_iir = 0; @@ -8704,6 +8708,7 @@ void intel_modeset_cleanup(struct drm_device *dev) * enqueue unpin/hotplug work. */ drm_irq_uninstall(dev); cancel_work_sync(&dev_priv->hotplug_work); + cancel_work_sync(&dev_priv->rps_work); /* flush any delayed tasks or pending work */ flush_scheduled_work(); |