On 25.06.2018 12:24, Jarkko Sakkinen wrote:

On Wed, Jun 20, 2018 at 07:17:54AM +0200, Peter Rosin wrote:

quoted

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_bus with the I2C_LOCK_SEGMENT flag. If the device does not
sit behind a mux-locked mux, the two locking variants are equivalent.

Signed-off-by: Peter Rosin <redacted>

Studied enough so that I can give

Reviewed-by: Jarkko Sakkinen <redacted>

Do not have hardware to test this, however.

I don't have a mux-locked I2C mux either, but at least I can confirm 
that this change did not break my existing test setup (SLB9635/SLB9645 
on Raspberry Pi 2B).

Tested-by: Alexander Steffen <redacted>

Alexander