Re: [PATCH 1/1] spi: imx: fix issue when tx_buf or rx_buf is NULL

[Andy Shevchenko]

On Fri, May 19, 2017 at 3:45 PM, Chris Ruehl <chris.ruehl@xxxxxxxxxxxx> wrote:
> On Thursday, May 18, 2017 06:01 PM, jiada_wang@xxxxxxxxxx wrote:

> But I think we missing something here. We return from a void function()
> so the error keeps hidden. The root cause is calling this functions with a
> NULL pointer. See if you can fix this by find the caller and check if the
> parameter hand over are valid.

AFAIU some SPI controllers can have half-duplex protocol, in which the
second buffer might be absent.


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-- 
With Best Regards,
Andy Shevchenko