1. 04 Oct, 2021 2 commits
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    • Janusz Krzysztofik's avatar
      drm/i915: Flush buffer pools on driver remove · 74af1e2c
      Janusz Krzysztofik authored
      We currently do an explicit flush of the buffer pools within the call path
      of drm_driver.release(); this removes all buffers, regardless of their age,
      freeing the buffers' associated resources (objects, address space areas).
      However there is other code that runs within the drm_driver.release() call
      chain that expects objects and their associated address space areas have
      already been flushed.
      
      Since buffer pools auto-flush old buffers once per second in a worker
      thread, there's a small window where if we remove the driver while there
      are still objects in buffers with an age of less than one second, the
      assumptions of the other release code may be violated.
      
      By moving the flush to driver remove (which executes earlier via the
      pci_driver.remove() flow) we're ensuring that all buffers are flushed and
      their associated objects freed before some other code in
      pci_driver.remove() flushes those objects so they are released before
      _any_ code in drm_driver.release() that check completness of those
      flushes executes.
      
      v2: Reword commit description as suggested by Matt.
      Signed-off-by: default avatarJanusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
      Cc: Chris Wilson <chris@chris-wilson.co.uk>
      Cc: Matt Roper <matthew.d.roper@intel.com>
      Signed-off-by: default avatarMatt Roper <matthew.d.roper@intel.com>
      Reviewed-by: default avatarMatt Roper <matthew.d.roper@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20210924163825.634606-1-janusz.krzysztofik@linux.intel.com
      74af1e2c
  7. 24 Sep, 2021 11 commits
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  10. 21 Sep, 2021 2 commits
  11. 20 Sep, 2021 6 commits