linux-kernel - Re: [PATCH 05/39] ARM: ux500: Stop passing MMC's platform data for Device Tree boots

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CACRpkdbOxzhgR=ugXLrSBJ_Y1rw=0mcrvtuRi=-c5v039xsPWA@mail.gmail.com>
Date:	Wed, 15 May 2013 18:50:47 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Felipe Balbi <balbi@...com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Vinod Koul <vinod.koul@...el.com>,
	Linus WALLEIJ <linus.walleij@...ricsson.com>,
	Arnd Bergmann <arnd@...db.de>,
	Srinidhi KASAGAR <srinidhi.kasagar@...ricsson.com>
Subject: Re: [PATCH 05/39] ARM: ux500: Stop passing MMC's platform data for
 Device Tree boots

On Wed, May 15, 2013 at 11:51 AM, Lee Jones <lee.jones@...aro.org> wrote:

> It was required to pass DMA channel configuration information to the
> MMC driver before the new DMA API was in place. Now that it is, and
> is fully compatible with Device Tree we can stop doing that.
>
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: Lee Jones <lee.jones@...aro.org>

So since the use of dma_request_slave_channel() is not upstream,
I guess this will break DMA use (i.e slow down transfers!) on all
device tree boots?

I'd be happy to apply it once the MMCI patch is in linux-next
indicating there may just be a window in the merge period
where it falls back to IRQ mode, but I don't want to disable
DMA on DT boots for an entire kernel cycle just like that.

Not applied as of yet.

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/