[PATCH] i2c: at91: add a sanity check on i2c message length

[Wolfram Sang]

On Wed, Oct 10, 2012 at 04:25:58PM +0200, ludovic.desroches at atmel.com wrote:
> From: Ludovic Desroches <ludovic.desroches at atmel.com>
> 
> If the i2c message length is zero, i2c-at91 will directly return an error
> instead of trying to send a zero-length message.
> 
> Signed-off-by: Ludovic Desroches <ludovic.desroches at atmel.com>

What happens if you send a 0 byte message? Some hardware is able to do
this and it will be used in SMBUS QUICK which the driver states to
support according to at91_twi_func().

Regards,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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