https://bugzilla.kernel.org/show_bug.cgi?id=219626 Bug ID: 219626 Summary: Infinite udev uevent stream from USB-C port Product: Drivers Version: 2.5 Hardware: Intel OS: Linux Status: NEW Severity: normal Priority: P3 Component: USB Assignee: drivers_usb@xxxxxxxxxxxxxxxxxxxxxx Reporter: hegel666@xxxxxxxxx CC: gsara1989@xxxxxxxxx Regression: Yes Bisected fa48d7e81624efdf398b990a9049e9cd75a5aead commit-id: Created attachment 307397 --> https://bugzilla.kernel.org/attachment.cgi?id=307397&action=edit udevadm monitor output After updating to 6.12.5 from 6.12.4 systemd-udevd worker burns CPU processing an infinite stream of USB-C events. In order to reproduce I have to plug off the USB cable and plug it in again. I tried 6.12.6 kernel with the same buggy result. The problem disappears after going back to 6.12.4. My machine is an ASUS Zenbook UM5302TA laptop. Reverting this commit fixes the issue: commit c0ca6fd5f6ebde8fc0df8bb5c32629d1284f60d0 Author: Saranya Gopal <saranya.gopal@xxxxxxxxx> Date: Fri Aug 30 14:13:42 2024 +0530 usb: typec: ucsi: Do not call ACPI _DSM method for UCSI read operations [ Upstream commit fa48d7e81624efdf398b990a9049e9cd75a5aead ] ACPI _DSM methods are needed only for UCSI write operations and for reading CCI during RESET_PPM operation. So, remove _DSM calls from other places. While there, remove the Zenbook quirk also since the default behavior now aligns with the Zenbook quirk. With this change, GET_CONNECTOR_STATUS returns at least 6 seconds faster than before in Arrowlake-S platforms. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
