tree 65c5b3adc3cdd995e5a2e7d02f1aba6c5eda7bba
parent aefcf2f4b58155d27340ba5f9ddbe9513da8286d
author Lee Jones <lee.jones@linaro.org> 1567711452 +0100
committer Wolfram Sang <wsa@the-dreams.de> 1569692824 +0200

i2c: qcom-geni: Disable DMA processing on the Lenovo Yoga C630

We have a production-level laptop (Lenovo Yoga C630) which is exhibiting
a rather horrific bug.  When I2C HID devices are being scanned for at
boot-time the QCom Geni based I2C (Serial Engine) attempts to use DMA.
When it does, the laptop reboots and the user never sees the OS.

Attempts are being made to debug the reason for the spontaneous reboot.
No luck so far, hence the requirement for this hot-fix.  This workaround
will be removed once we have a viable fix.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>