Bug 194969
Summary: | [BISECTED] i2c designware regression | ||
---|---|---|---|
Product: | Drivers | Reporter: | paul |
Component: | I2C | Assignee: | Drivers/I2C virtual user (drivers-i2c) |
Status: | NEW --- | ||
Severity: | normal | CC: | jarkko.nikula, jose.souza, mirh |
Priority: | P1 | ||
Hardware: | Intel | ||
OS: | Linux | ||
Kernel Version: | 4.9 | Subsystem: | |
Regression: | Yes | Bisected commit-id: |
Description
paul
2017-03-23 16:56:26 UTC
Could you try how does v4.9.17 work with the revert? One difference between v4.9 and v4.9.17 is that commit 12688dc21f71 ("Revert "i2c: designware: detect when dynamic tar update is possible"") got reverted during v4.10 and was sent back to v4.9 stable kernels too. Kernel v4.9.17 works fine with the revert, just like 4.9.0, so the commit you mention doesn't seem to be involved. Both patches were tested in a Bay Trail platform(Minnowboard Max) and Cherry Trail(Intel Aero) and worked with great performance improvements, did you have debug what is failing? There is any error returned after a I2C transaction? Bug found and fix sent upstream: https://patchwork.kernel.org/patch/9654233/ Nice :D Should have landed by v4.14-rc6. Can be closed then? |