linux-kernel - Re: [PATCH 01/14] parport: return value of attach and parport_register

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Message-ID: <20150408175600.GI18177@1wt.eu>
Date:	Wed, 8 Apr 2015 19:56:00 +0200
From:	Willy Tarreau <w@....eu>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	devel@...verdev.osuosl.org,
	Rodolfo Giometti <giometti@...eenne.com>,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>,
	Wolfram Sang <wsa@...-dreams.de>, Takashi Iwai <tiwai@...e.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	alsa-devel@...a-project.org,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Mark Brown <broonie@...nel.org>, linux-i2c@...r.kernel.org,
	linux-spi@...r.kernel.org, netdev@...r.kernel.org,
	Jean Delvare <jdelvare@...e.de>
Subject: Re: [PATCH 01/14] parport: return value of attach and parport_register_driver

On Wed, Apr 08, 2015 at 03:27:37PM +0300, Dan Carpenter wrote:
> On Wed, Apr 08, 2015 at 05:20:10PM +0530, Sudip Mukherjee wrote:
> > On Wed, Apr 08, 2015 at 02:38:32PM +0300, Dan Carpenter wrote:
> > > 1) We can't apply this patch on its own so this way of breaking up the
> > > patches doesn't work.
> > yes, if the first patch is reverted for any reason all the others need
> > to be reverted also. so then everything in one single patch?
> 
> The problem is that patch 1/1 breaks the build.  The rule is that we
> should be able to apply part of a patch series and nothing breaks.  If
> we apply the patch series out of order than things break that's our
> problem, yes.  But if we apply only 1/1 and it breaks, that's a problem
> with the series.

Yep, keep in mind that "git bisect" will randomly land in the middle of
any set of patches during a debugging session and it could very well land
on this one. If it breaks, that's a real pain for the people trying to
bisect their bug because suddenly they have to deal with a second bug
totally different from theirs.

Regards,
Willy

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