[PATCH v2 01/10] tpm/tpm_i2c_infineon: switch to i2c_lock_bus(..., I2C_LOCK_SEGMENT)
From: Jarkko Sakkinen <hidden>
Date: 2018-06-26 12:05:39
Also in:
linux-i2c, linux-iio, linux-input, linux-integrity, linux-media, linux-samsung-soc, lkml
On Tue, 2018-06-26 at 12:07 +0200, Alexander Steffen wrote:
On 25.06.2018 12:24, Jarkko Sakkinen wrote:quoted
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
Given the scope of the change and since analogous change works for every other subsystem, this should be enough! Thank you. /Jarkko