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media: mem2mem: Make .job_abort optional

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Implementing job_abort() does not make sense on some drivers.
This is not a problem, as the abort is not required to
wait for the job to finish. Quite the opposite, drivers
are encouraged not to wait.

Demote v4l2_m2m_ops.job_abort from required to optional, and
clean all drivers with dummy implementations.

Signed-off-by: Ezequiel Garcia <[email protected]>
Signed-off-by: Hans Verkuil <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
This commit is contained in:
Ezequiel Garcia 2018-06-18 00:38:52 -04:00 • committed by Mauro Carvalho Chehab
commit 5525b83143
8 changed files with 4 additions and 37 deletions
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2
include/media/v4l2-mem2mem.h
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@ -32,7 +32,7 @@
* assumed that one source and one destination buffer are all
* that is required for the driver to perform one full transaction.
* This method may not sleep.
* @job_abort: required. Informs the driver that it has to abort the currently
* @job_abort: optional. Informs the driver that it has to abort the currently
* running transaction as soon as possible (i.e. as soon as it can
* stop the device safely; e.g. in the next interrupt handler),
* even if the transaction would not have been finished by then.