linux-kernel - Re: [PATCH v4 1/2] i2c: add DMA support for freescale i2c driver

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]

Date:	Fri, 4 Apr 2014 15:45:15 +0000
From:	Yao Yuan <yao.yuan@...escale.com>
To:	Marek Vasut <marex@...x.de>
CC:	"wsa@...-dreams.de" <wsa@...-dreams.de>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"shawn.guo@...aro.org" <shawn.guo@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>
Subject: Re: [PATCH v4 1/2] i2c: add DMA support for freescale i2c driver

On Friday, April 04, 2014 at 22:29:32 PM, Marek Vasut wrote:
> On Friday, April 04, 2014 at 04:41:11 AM, Yuan Yao wrote:
> > Add dma support for i2c. This function depend on DMA driver.
> > You can turn on it by write both the dmas and dma-name properties in dts
> > node.
> >
> > Signed-off-by: Yuan Yao <yao.yuan@...escale.com>

[...]

> Since you will be fixing that superfluous return 0; (I actually wonder, did you
> really test the driver at all before submitting it?) ...

I'm sorry for the leftover. It's a serious bug. The support by DMA will be disabled always.
Thanks for your consideration. But subjective assume may not suitable. Testing is a essential link . 
But the bug can't be found by normal test . The testing may not be  imperfect, it's my 
serious fault, but please don't doubt my work attitude.
The ugly is my work or even the ability but not the attitude, I think.

At last, Thank you for giving me a lot of help, it's very important for me.

> > +static int i2c_imx_dma_xfer(struct imx_i2c_struct *i2c_imx,
> > +                                     struct i2c_msg *msgs)
> > +{
> > +     struct imx_i2c_dma *dma = i2c_imx->dma;
> > +     struct dma_async_tx_descriptor *txdesc;
> > +     struct device *dev = &i2c_imx->adapter.dev;
> +
> +     dma->dma_buf = dma_map_single(dma->chan_using->device->dev, msgs->buf,
[...]

>  Reviewed-by: Marek Vasut <marex@...x.de>

--
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/