On Tue, 2018-06-26 at 12:07 +0200, Alexander Steffen wrote: > 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 Given the scope of the change and since analogous change works for every other subsystem, this should be enough! Thank you. /Jarkko
