Re: [PATCH 02/11] tpm/tpm_i2c_infineon: switch to i2c_lock_segment

[Peter Rosin]

On 2018-06-19 14:56, Jarkko Sakkinen wrote:
> On Fri, Jun 15, 2018 at 12:14:57PM +0200, Peter Rosin wrote:
>> Locking the root adapter for __i2c_transfer will deadlock if the
>> device sits behind a mux-locked I2C mux. Switch to the finer-grained
>> i2c_lock_segment. If the device does not sit behind a mux-locked mux,
>> the two locking variants are equivalent.
>>
>> Signed-off-by: Peter Rosin <peda@xxxxxxxxxx>
> 
> Can you quickly explain (or give a reference) the difference with these
> functions? Not an expert in this area. Thanks.

There are some words in the cover letter. If you need more, there's
always Documentation/i2c/i2c-topology. Hope that helps, otherwise I'll
try to explain better...

Cheers,
Peter