On 25.06.2018 12:24, Jarkko Sakkinen wrote:
On Wed, Jun 20, 2018 at 07:17:54AM +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_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 <peda@xxxxxxxxxx>
Studied enough so that I can give
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
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 <Alexander.Steffen@xxxxxxxxxxxx>
Alexander
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