After sending out the 'lose_arbitration' injector as RFC, here is now a patch series with that injector updated and another one added.
The first one successfully triggers an ARBITRATION_LOST interrupt on my Renesas Lager board (R-Car H2). The other one leaves SCL low on the same board because of the Kernel panic, so reboot handlers need to handle that. But more interestingly, it causes a deadlock because it needs this I2C adapter to trigger a reboot via the PMIC. This is a good testcase for the soon to be developed master_xfer_atomic callback for the I2C core. Changes since V1: * fixed a typo in the docs and used UTF8 for µs there * limit user-supplied delay to 100ms * don't overwrite existing errorcode if gpiod_direction_output() suceeds No error propagation when we receive a signal. This is all handled seperately in other layers as further tests have shown. Wolfram Sang (2): i2c: gpio: fault-injector: add 'lose_arbitration' injector i2c: gpio: fault-injector: add 'inject_panic' injector Documentation/i2c/gpio-fault-injection | 51 ++++++++++++++++ drivers/i2c/busses/i2c-gpio.c | 103 +++++++++++++++++++++++++++++++++ 2 files changed, 154 insertions(+) -- 2.11.0