linux-kernel - Re: [PATCH 3/8] Documentation/spi/spidev

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Date:	Tue, 17 Nov 2015 11:28:29 -0800
From:	Joshua Clayton <stillcompiling@...il.com>
To:	linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org
Cc:	Anton Bondarenko <anton.bondarenko.sama@...il.com>,
	Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
	linux-spi@...r.kernel.org
Subject: Re: [PATCH 3/8] Documentation/spi/spidev_test.c: accept input from a file

On Tuesday, November 17, 2015 07:26:54 PM Anton Bondarenko wrote:
> On 17.11.2015 16:24, Joshua Clayton wrote:
> > +	if (sb.st_size > 4096)
> > +		pabort("input file exceeds spidev's 4k limit");
> This is not a true. IIRC PAGE_SIZE is the default buffer size for 
> spidev, but can be changed using bufsiz module parameter.
> Just 'insmod spidev bufsiz=X', where X is number of bytes.

You are right. I will drop this. As Mark suggests.
The ioctl gives a nice error code if the buffer is too big.

...
> > +	tx = malloc(sb.st_size);
> It would be good to check new allocations for fail.

I will add a check for this. 

-- 
~Joshua Clayton
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