tree 42270272224cdc3532f0923a8317adfecd0d6dcc
parent a0f8caefaf3295721ef00415c7d63ec10af253ab
author Sylwester Nawrocki <s.nawrocki@samsung.com> 1298460273 -0300
committer Mauro Carvalho Chehab <mchehab@redhat.com> 1300780455 -0300

[media] s5p-fimc: Prevent hanging on device close and fix the locking

Rework the locking in m2m driver to assure proper operation on SMP systems.

When job_abort or stop_streaming was called to immediately shutdown
a memory-to-memory transaction video buffers scheduled for processing
were never returned to vb2 and v4l2_m2m_job_finish was not called
which led to hanging.

Correct this and also return the unprocessed buffers to vb2 marking
them as erroneous, in case the end of frame interrupt do not occur.

Reported-by: Sewoon Park <seuni.park@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>