Re: [GIT PULL FOR v3.19] uvcvideo changes

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Hi Mauro,

On Monday 24 November 2014 08:12:11 Mauro Carvalho Chehab wrote:
> Em Mon, 24 Nov 2014 11:06:49 +0200 Laurent Pinchart escreveu:
> > On Tuesday 11 November 2014 08:56:26 Mauro Carvalho Chehab wrote:
> > > Em Fri, 07 Nov 2014 08:16:28 +0200 Laurent Pinchart escreveu:
> > > > Hi Mauro,
> > > > 
> > > > The following changes since commit
> > 
> > 4895cc47a072dcb32d3300d0a46a251a8c6db5f1:
> > > >   [media] s5p-mfc: fix sparse error (2014-11-05 08:29:27 -0200)
> > > > 
> > > > are available in the git repository at:
> > > >   git://linuxtv.org/pinchartl/media.git remotes/media/uvc/next
> > > 
> > > It seems that there's something weird with this URL... remotes????
> > 
> > git isn't playing nicely :-/
> > 
> > I've pushed the changes to the uvc/next branch on
> > git://linuxtv.org/pinchartl/media.git, up to commit a1bee5f9f606.
> > http://git.linuxtv.org/cgit.cgi/pinchartl/media.git/commit/?h=uvc/next
> > confirms that everything is in order.
> > 
> > However, running
> > 
> > git request-pull local-linuxtv-master media remotes/media/uvc/next
> 
> Seriously? Do you want git to change remotes? I don't think you can
> do that. The remotes branches are to track something remote, e. g.
> the references there should be already at the remote tree.

I don't want git to change remotes, I want git to react to what is in the 
remote tree.

For historical reasons my local branch is named uvcvideo/next, while the 
remote branch is named uvc/next. They both point to the same commit. Before 
upgrading to git v2.0.4 running

	git request-pull local-linuxtv-master media remotes/media/uvc/next

would not incorrectly warn that the commit ID isn't available remotely (as it 
is available) and would produce the git URL

	git://linuxtv.org/pinchartl/media.git uvc/next

> You should, instead, create a local branch and push it upstream.

I've done that, the problem is that the local and remote branches have 
different names.

I should of course have read the latest git-request-pull man page and run

	git request-pull local-linuxtv-master media uvcvideo/next:uvc/next

That works fine.

> > with the media remote pointing to git://linuxtv.org/pinchartl/media.git
> > generates
> > 
> > ----------
> > warn: No match for commit a1bee5f9f606f89ff30171658a82bf532cca7f3d found
> > at git://linuxtv.org/pinchartl/media.git
> > warn: Are you sure you pushed 'remotes/media/uvc/next' there?
> > 
> > The following changes since commit 
4895cc47a072dcb32d3300d0a46a251a8c6db5f1:
> >   [media] s5p-mfc: fix sparse error (2014-11-05 08:29:27 -0200)
> > 
> > are available in the git repository at:
> >   git://linuxtv.org/pinchartl/media.git remotes/media/uvc/next
> > 
> > for you to fetch changes up to a1bee5f9f606f89ff30171658a82bf532cca7f3d:
> >   uvcvideo: Return all buffers to vb2 at stream stop and start failure
> > 
> > (2014-11-07 08:13:21 +0200)
> > ----------
> > 
> > For some reason git can't find the remote branch (hence the warning) and
> > thus generates the URL line incorrectly.
> > 
> > I've tried upgrading from git 2.0.4 to git 2.1.3 but the problem is still
> > present. Creating a local branch named uvc/next fixes the problem.
> 
> Yes, that's the right thing to do. Only modify local branches.
> 
> Git considers that the branches under remotes/* will be handled by
> it. If you ever do a "git remote update". You'll see that git will override
> all references that are on a remote branch and you'll loose your work!
> 
> I think that even git revlog won't help you to recover the missing heads,
> as it won't track branches under remotes/*.
> 
> > I wonder if I'm doing something really stupid or if it's a git bug.
> 
> Well, git is right. You should not use remotes/foo for the branches
> you're modifying. Such namespace is reserved for git to be able to
> track the upstream branches.
>
> > Can you pull from
> > 
> >         git://linuxtv.org/pinchartl/media.git uvc/next
> 
> Sure, I'll do it along this week.

Thank you.

> > ? I haven't updated the branch since I've sent the last pull request.

-- 
Regards,

Laurent Pinchart

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