Re: [PATCH AUTOSEL for 4.9 002/219] spi/bcm63xx: make spi subsystem aware of message size limits

Sasha Levin
2018-03-05T20:07:49Z

On Mon, Mar 05, 2018 at 10:23:10AM +0000, Mark Brown wrote:
>On Sat, Mar 03, 2018 at 10:27:56PM +0000, Sasha Levin wrote:
>> From: Jonas Gorski <jonas.gorski@gmail.com>
>>
>> [ Upstream commit 0135c03df914f0481c61f097c78d37cece84f330 ]
>
>Why are there so many more patches for v4.9 than for more recent
>kernels?

The v4.11..v4.14 range got processed, and all those commits are now
being pushed into 4.9 and older.

>> The bcm63xx SPI controller does not allow manual control of the CS
>> lines and will toggle it automatically before and after sending data,
>> so we are limited to messages that fit in the FIFO buffer. Since the CS
>> lines aren't available as GPIOs either, we will need to make slave
>> drivers aware of this limitation so they can handle them accordingly.
>
>This seems really aggressive for stable...

Why so?

--

Thanks,
Sasha