[PATCH 2/6] xf86drmMode: separate drmModeAtomicCommit() and drmModeAtomicCleanup()

Hyungwon Hwang human.hwang at samsung.com
Thu Aug 20 21:54:49 PDT 2015

Hi Emil,

On Thu, 20 Aug 2015 17:17:27 +0100
Emil Velikov <emil.l.velikov at gmail.com> wrote:

> Hi Hyungwon,
> On 19 August 2015 at 01:58, Hyungwon Hwang <human.hwang at samsung.com>
> wrote:
> > This patch seprates the code, which sorts proprty sets and
> > eliminates duplicate properties, from drmModeAtomicCommit(). Now
> > drmModeAtomicCleanup() has to do the job before calling
> > drmModeAtomicCommit(), and drmModeAtomicCommit() just converts the
> > cleaned request to IOCTL argument.
> >
> Afaict the commit message should say why we want this, rather than
> rewording what the patch does.
> I'm not sure about the atomic status for wayland and others but this
> commit might cause issues there. Additionally, with this patch we'll
> send a lot of useless information to the kernel if one omits
> drmModeAtomicCleanup(). The kernel will likely discard it but still
> this doesn't seem like a good idea imho.

Yes. I agree that this change burdens the userspace application to use
API correctly. In my case, for modetest, the function of cleaning up
the request is needed, so I thought that this separation would be
needed. Overall, I agree with you. So I will drop this patch, and find
another way which is specific for modetest.

Thanks for your review.

Best regards,
Hyungwon Hwang

> -Emil

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