From: Mauro Carvalho Chehab <mchehab@redhat.com>
To: Devin Heitmueller <dheitmueller@kernellabs.com>
Cc: "Frank Schäfer" <fschaefer.oss@googlemail.com>,
linux-media@vger.kernel.org
Subject: Re: [PATCH 00/23] em28xx: add support fur USB bulk transfers
Date: Tue, 30 Oct 2012 12:03:00 -0200 [thread overview]
Message-ID: <20121030120300.2b316451@redhat.com> (raw)
In-Reply-To: <CAGoCfiw+G2CnGJSum2k9M80XizKSTfw34gXZOkOZBp_OvSTtjQ@mail.gmail.com>
Em Tue, 30 Oct 2012 09:08:15 -0400
Devin Heitmueller <dheitmueller@kernellabs.com> escreveu:
> On Tue, Oct 30, 2012 at 12:06 AM, Mauro Carvalho Chehab
> <mchehab@redhat.com> wrote:
> > Did a git bisect. The last patch where the bug doesn't occur is this
> > changeset:
> > em28xx: add module parameter for selection of the preferred USB transfer type
> >
> > That means that this changeset broke it:
> >
> > em28xx: use common urb data copying function for vbi and non-vbi devices
>
> Oh good, when I saw the subject line for that patch, I got worried.
> Looking at the patch, it seems like he just calls the VBI version for
> both cases assuming the VBI version is a complete superset of the
> non-VBI version, which it is clearly not.
>
> That whole patch should just be reverted.
I didn't apply Frank's patch yet. So, no need to revert ;) Also, the test
is still incomplete, as I didn't check if the existing webcam support is
still working. I also didn't review each individual changes (although,
on a quick glance, except for those two final patches, nothing bad popped-up).
I'll likely finish testing and will review it only after my return
back from ELCE.
> If he's going to spend the
> time to refactor the code to allow the VBI version to be used for both
> then fine, but blindly calling the VBI version without making real
> code changes is *NOT* going to work.
Yes.
> Frank, good job in naming your patch - it made me scream "WAIT!" when
> I saw it. Bad job for blindly submitting a code change without any
> idea whether it actually worked. ;-)
>
> I know developers have the tendency to look at code and say "oh,
> that's ugly, I should change that." However it's more important that
> it actually work than it be pretty.
>
> Devin
>
--
Regards,
Mauro
next prev parent reply other threads:[~2012-10-30 14:03 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-21 16:52 [PATCH 00/23] em28xx: add support fur USB bulk transfers Frank Schäfer
2012-10-21 16:52 ` [PATCH 01/23] em28xx: fix wrong data offset for non-interlaced mode in em28xx_copy_video Frank Schäfer
2012-10-21 16:52 ` [PATCH 02/23] em28xx: clarify meaning of field 'progressive' in struct em28xx Frank Schäfer
2012-10-21 16:52 ` [PATCH 03/23] em28xx: rename isoc packet number constants and parameters Frank Schäfer
2012-10-21 16:52 ` [PATCH 04/23] em28xx: rename struct em28xx_usb_isoc_bufs to em28xx_usb_bufs Frank Schäfer
2012-10-21 16:52 ` [PATCH 05/23] em28xx: rename struct em28xx_usb_isoc_ctl to em28xx_usb_ctl Frank Schäfer
2012-10-21 16:52 ` [PATCH 06/23] em28xx: remove obsolete #define EM28XX_URB_TIMEOUT Frank Schäfer
2012-10-21 16:52 ` [PATCH 07/23] em28xx: update description of em28xx_irq_callback Frank Schäfer
2012-10-21 16:52 ` [PATCH 08/23] em28xx: rename function em28xx_uninit_isoc to em28xx_uninit_usb_xfer Frank Schäfer
2012-10-21 16:52 ` [PATCH 09/23] em28xx: create a common function for isoc and bulk URB allocation and setup Frank Schäfer
2012-10-21 16:52 ` [PATCH 10/23] em28xx: create a common function for isoc and bulk USB transfer initialization Frank Schäfer
2012-10-21 16:52 ` Frank Schäfer
2012-10-21 16:52 ` [PATCH 11/23] em28xx: clear USB halt/stall condition in em28xx_init_usb_xfer when using bulk transfers Frank Schäfer
2012-10-21 16:52 ` [PATCH 12/23] em28xx: remove double checks for urb->status == -ENOENT in urb_data_copy functions Frank Schäfer
2012-10-21 16:52 ` [PATCH 13/23] em28xx: rename function em28xx_isoc_copy and extend for USB bulk transfers Frank Schäfer
2012-10-21 16:52 ` [PATCH 14/23] em28xx: rename function em28xx_isoc_copy_vbi " Frank Schäfer
2012-10-21 16:52 ` [PATCH 15/23] em28xx: rename function em28xx_dvb_isoc_copy " Frank Schäfer
2012-10-21 16:52 ` [PATCH 16/23] em28xx: rename usb debugging module parameter and macro Frank Schäfer
2012-10-21 16:52 ` [PATCH 17/23] em28xx: rename some USB parameter fields in struct em28xx to clarify their role Frank Schäfer
2012-10-21 16:52 ` [PATCH 18/23] em28xx: add fields for analog and DVB USB transfer type selection to struct em28xx Frank Schäfer
2012-10-21 16:52 ` [PATCH 19/23] em28xx: set USB alternate settings for analog video bulk transfers properly Frank Schäfer
2012-10-21 16:52 ` [PATCH 20/23] em28xx: improve USB endpoint logic, also use bulk transfers Frank Schäfer
2012-10-21 16:52 ` [PATCH 21/23] em28xx: add module parameter for selection of the preferred USB transfer type Frank Schäfer
2012-10-21 16:52 ` [PATCH 22/23] em28xx: use common urb data copying function for vbi and non-vbi devices Frank Schäfer
2012-10-21 16:52 ` [PATCH 23/23] em28xx: enable VBI-support for em2840 devices Frank Schäfer
2012-10-21 18:13 ` [PATCH 00/23] em28xx: add support fur USB bulk transfers Devin Heitmueller
2012-10-23 19:02 ` Frank Schäfer
[not found] ` <20121028175752.447c39d5@redhat.com>
2012-10-29 15:33 ` Frank Schäfer
2012-10-29 20:03 ` Mauro Carvalho Chehab
2012-10-29 21:14 ` Frank Schäfer
2012-10-30 3:00 ` Mauro Carvalho Chehab
2012-10-30 4:06 ` Mauro Carvalho Chehab
2012-10-30 13:08 ` Devin Heitmueller
2012-10-30 14:03 ` Mauro Carvalho Chehab [this message]
2012-10-30 17:29 ` Frank Schäfer
2012-10-30 17:18 ` Frank Schäfer
2012-11-08 18:03 ` Frank Schäfer
2012-11-09 15:02 ` Mauro Carvalho Chehab
2012-11-09 16:03 ` Frank Schäfer
2012-10-31 1:39 ` Benny Amorsen
2012-10-31 10:57 ` Ezequiel Garcia
2012-10-31 12:03 ` Frank Schäfer
2012-10-31 20:24 ` Benny Amorsen
2012-10-31 20:22 ` Benny Amorsen
2012-10-31 11:50 ` Frank Schäfer
2012-10-31 19:58 ` Benny Amorsen
2012-10-31 20:25 ` Ezequiel Garcia
2012-10-31 22:26 ` Benny Amorsen
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