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i2c: mux: pca9541: switch to i2c_lock_bus(..., I2C_LOCK_SEGMENT)
authorPeter Rosin <peda@axentia.se>
Wed, 20 Jun 2018 05:17:55 +0000 (07:17 +0200)
committerWolfram Sang <wsa@the-dreams.de>
Thu, 12 Jul 2018 22:08:14 +0000 (00:08 +0200)
commitf06c97dd50870c3ccdea0726617a729bb83f5d30
tree8011d5b61e9c65f872819de79c8d9afe19c7a6bctree | snapshot
parentbb853aac2c478ce78116128263801189408ad2a8commit | diff
i2c: mux: pca9541: switch to i2c_lock_bus(..., I2C_LOCK_SEGMENT)

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@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
drivers/i2c/muxes/i2c-mux-pca9541.c diff | blob | history
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