linux-kernel - Re: [PATCH] bluetooth: Add hci

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Date:	Tue, 20 Jan 2015 18:36:04 +0100
From:	Pavel Machek <pavel@....cz>
To:	Marcel Holtmann <marcel@...tmann.org>
Cc:	Pali Rohár <pali.rohar@...il.com>,
	Sebastian Reichel <sre@...ian.org>,
	Sebastian Reichel <sre@...g0.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-omap <linux-omap@...r.kernel.org>,
	Tony Lindgren <tony@...mide.com>, khilman@...nel.org,
	Aaro Koskinen <aaro.koskinen@....fi>,
	ivo.g.dimitrov.75@...il.com, linux-bluetooth@...r.kernel.org
Subject: Re: [PATCH] bluetooth: Add hci_h4p driver

Hi!

> > Add HCI driver for H4 with Nokia extensions. This device is used on
> > Nokia N900 cell phone.
> > 
> > Older version of this driver lived in staging, before being reverted
> > in a4102f90e87cfaa3fdbed6fdf469b23f0eeb4bfd .
> > 
> > Signed-off-by: Pavel Machek <pavel@....cz>
> > Thanks-to: Sebastian Reichel <sre@...ian.org>
> > Thanks-to: Joe Perches <joe@...ches.com>
> > 
> > ---
> > 
> > Please apply,
> > 								Pavel
> > 
> > 
> > Kconfig      |   10 
> > Makefile     |    4 
> > nokia_core.c | 1149 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > nokia_fw.c   |   99 +++++
> > nokia_h4p.h  |  214 ++++++++++
> > nokia_uart.c |  171 ++++++++
> > 7 files changed, 1667 insertions(+)

Speaking about formatting, could you properly format your emails, that
is inserting newline after ~78 columns, to make them easier to reply
to?

> so when I run this through checkpatch --strict, then I get tons of warning that we have DOS style ^M line breaks. There are also trailing whitespace that need fixing. I can use cleanpatch to do this, but so can you.
>

Strange, where do you see DOS style line breaks? Checkpatch here does
not warn about that, and they really should not be there.

> Even after doing that there are still obvious plain coding style violation in the patch. For example:
> 
> ERROR: space prohibited before that ',' (ctx:WxW)
> #610: FILE: drivers/bluetooth/nokia_core.c:517:
> +			__h4p_set_auto_ctsrts(info, 0 , UART_EFR_RTS);

Yeah, I should have catched that one.

> CHECK: Alignment should match open parenthesis
> #662: FILE: drivers/bluetooth/nokia_core.c:569:
> +		h4p_outb(info, UART_OMAP_SCR,
> +			     h4p_inb(info, UART_OMAP_SCR) |
> 
> CHECK: Blank lines aren't necessary before a close brace '}'
> #692: FILE: drivers/bluetooth/nokia_core.c:599:
> +
> +}
> 
> These are only few. They are more and all these need fixing before I
> even consider it.

Yeah, so first patch was too good for staging, and I "would be allowed
to clean it up in tree", and now you run checkpatch --strict,
complaining about very serious stuff such as "blank lines before }".

Yes, checkpatch produces a lot of junk, like warnings about
mdelay(). I'm not sure how you'd want #662 above, formatted.

pavel@amd:/data/l/linux-n900$ scripts/checkpatch.pl --strict --file
drivers/bluetooth/*.c | wc -l 3194
pavel@amd:/data/l/linux-n900$

...so I really can't know which checkpatch complains you consider
serious and which are ok... And yes, I guess I should trim down those
FSF notices.

> Also this worries me:
> 
> WARNING: DT compatible string "brcm,uart,bcm2048" appears un-documented -- check ./Documentation/devicetree/bindings/
> #1222: FILE: drivers/bluetooth/nokia_core.c:1129:
> +	{ .compatible = "brcm,uart,bcm2048" },

Yes, that wories me, too. It is one of reasons I wanted this to be
merged to staging. Arguing about right bindings will take some time.

I can fix the checkpatch stuff that makes sense. That does not include
uglyfying code just for checkpatch.  Can you then take the patch, as
you promised, and let me argue the bindings, and the other stuff that
needs to be fixed?

If not, can we agree that the driver in staging should be reverted, as
Greg promised would be "easy", and I can clean it up there?

Thanks,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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