[PATCH 0/2] staging: tidspbridge: fix dma race condition

[Felipe Contreras]

Hi,

I found a race condition that triggers a kernel panic. It's explained in the
following patches, but basically the map_obj that contains the user pages is
being destroyed while doing a DMA operation (which requires that map_obj).

My solution is to convert the spinlock to a semaphore, and exten the area
protected (which might sleep).

I have not tested these specific patches; they have been forward ported. But in
a similar branch, they solve the issue.

Felipe Contreras (2):
  staging: tidspbridge: convert dmm_map_lock to sema
  staging: tidspbridge: extend dmm_map semaphore

 .../staging/tidspbridge/include/dspbridge/drv.h    |    2 +-
 drivers/staging/tidspbridge/rmgr/drv_interface.c   |    2 +-
 drivers/staging/tidspbridge/rmgr/proc.c            |   23 +++++++++++++-------
 3 files changed, 17 insertions(+), 10 deletions(-)

-- 
1.7.3.3

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