mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

[media] v4l2-mem2mem: Don't schedule the context if abort job is called 

When the current context is running,
1] If release is called, it waits until the job is finished.
2] As soon as the job is finished, v4l2_mem_ctx_release()tries to
   release the vb2 queues.
3] But if the current context can be scheduled in the v4l2_m2m_job_finish()
   it schedules the context and tries to call device_run().
4] As the release() and device_run() sequence can't be predicted sometimes
   device_run() may get empty vb2 buffers.

This patch adds the ABORT state to the job_flags. Once the job_abort() or
release() is called on the context, the same context will not be scheduled in
the v4l2_m2m_job_finish().

Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Shaik Ameer Basha 2013-09-20 03:26:18 -03:00 committed by Mauro Carvalho Chehab
parent d9315160ed
commit 2ad5389b34
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/media/v4l2-core/v4l2-mem2mem.c
View File

@ -41,6 +41,8 @@ module_param(debug, bool, 0644);
#define TRANS_QUEUED (1 << 0)
/* Instance is currently running in hardware */
#define TRANS_RUNNING (1 << 1)
/* Instance is currently aborting */
#define TRANS_ABORT (1 << 2)
/* Offset base for buffers on the destination queue - used to distinguish
@ -221,6 +223,14 @@ static void v4l2_m2m_try_schedule(struct v4l2_m2m_ctx *m2m_ctx)
}
spin_lock_irqsave(&m2m_dev->job_spinlock, flags_job);
/* If the context is aborted then don't schedule it */
if (m2m_ctx->job_flags & TRANS_ABORT) {
spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job);
dprintk("Aborted context\n");
return;
}
if (m2m_ctx->job_flags & TRANS_QUEUED) {
spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job);
dprintk("On job queue already\n");
@ -280,6 +290,8 @@ static void v4l2_m2m_cancel_job(struct v4l2_m2m_ctx *m2m_ctx)
m2m_dev = m2m_ctx->m2m_dev;
spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
m2m_ctx->job_flags |= TRANS_ABORT;
if (m2m_ctx->job_flags & TRANS_RUNNING) {
spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
m2m_dev->m2m_ops->job_abort(m2m_ctx->priv);