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

[PATCH 00/11] Split i2c_lock_adapter into i2c_lock_root and i2c_lock_segment · Peter Rosin <hidden> · 2018-06-15
[PATCH 01/11] i2c: add helpers for locking the I2C segment · Peter Rosin <hidden> · 2018-06-15
Re: [PATCH 01/11] i2c: add helpers for locking the I2C segment · Wolfram Sang <hidden> · 2018-06-18
Re: [PATCH 01/11] i2c: add helpers for locking the I2C segment · Peter Rosin <hidden> · 2018-06-18
Re: [PATCH 01/11] i2c: add helpers for locking the I2C segment · Wolfram Sang <hidden> · 2018-06-18
Re: [PATCH 01/11] i2c: add helpers for locking the I2C segment · Peter Rosin <hidden> · 2018-06-19
[PATCH 05/11] media: af9013: switch to i2c_lock_segment · Peter Rosin <hidden> · 2018-06-15
[PATCH 11/11] i2c: rename i2c_lock_adapter to i2c_lock_root · Peter Rosin <hidden> · 2018-06-15
[PATCH 07/11] media: rtl2830: switch to i2c_lock_segment · Peter Rosin <hidden> · 2018-06-15
[PATCH 10/11] mfd: 88pm860x-i2c: switch to i2c_lock_segment · Peter Rosin <hidden> · 2018-06-15
[PATCH 06/11] media: drxk_hard: switch to i2c_lock_segment · Peter Rosin <hidden> · 2018-06-15
[PATCH 09/11] media: tda18271: switch to i2c_lock_segment · Peter Rosin <hidden> · 2018-06-15
[PATCH 08/11] media: tda1004x: switch to i2c_lock_segment · Peter Rosin <hidden> · 2018-06-15
[PATCH 04/11] input: rohm_bu21023: switch to i2c_lock_segment · Peter Rosin <hidden> · 2018-06-15
Re: [PATCH 04/11] input: rohm_bu21023: switch to i2c_lock_segment · Dmitry Torokhov <dmitry.torokhov@gmail.com> · 2018-06-19
[PATCH 03/11] i2c: mux: pca9541: switch to i2c_lock_segment · Peter Rosin <hidden> · 2018-06-15
[PATCH 02/11] tpm/tpm_i2c_infineon: switch to i2c_lock_segment · Peter Rosin <hidden> · 2018-06-15
Re: [PATCH 02/11] tpm/tpm_i2c_infineon: switch to i2c_lock_segment · Jarkko Sakkinen <hidden> · 2018-06-19
Re: [PATCH 02/11] tpm/tpm_i2c_infineon: switch to i2c_lock_segment · Peter Rosin <hidden> · 2018-06-19
Re: [PATCH 00/11] Split i2c_lock_adapter into i2c_lock_root and i2c_lock_segment · Wolfram Sang <hidden> · 2018-06-18

From: Jarkko Sakkinen <hidden>
Date: 2018-06-19 12:56:50
Also in: linux-arm-kernel, linux-i2c, linux-iio, linux-integrity, linux-media, linux-samsung-soc, linux-tegra, lkml

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 <redacted>

Can you quickly explain (or give a reference) the difference with these
functions? Not an expert in this area. Thanks.

/Jarkko

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