RfC: Handle SPI controller limitations like maximum message length

[Heiner Kallweit]

Am 20.11.2015 um 20:18 schrieb Mark Brown:
> On Fri, Nov 20, 2015 at 07:59:37PM +0100, Heiner Kallweit wrote:
> 
>> OK, I interpret this as:
>> Controller drivers shall return 0 only if the complete message was
>> transferred successfully.
> 
> Yes.
> 
>> If  a controller driver returns an error it has the option to set
>> actual_length to what was transferred successfully.
> 
> It should always do this.
> 
>> This means we can't use patch 4 from Michal because it bails out as soon
>> as the underlying SPI transfer returns an error.
> 
> I haven't seen that patch.
> 
Sorry, this was addressed to Brian. It's about a mtd spi-nor patch.
http://lists.infradead.org/pipermail/linux-mtd/2015-August/061062.html
Most likely neither you nor linux-spi was on cc.
(Oh, it was patch 7 of the series, not 4.)