CVE-2021-46969 bus: mhi: core: Fix invalid error returning in mhi_queue

In the Linux kernel, the following vulnerability has been resolved: bus: mhi: core: Fix invalid error returning in mhiqueue mhiqueue returns an error when the doorbell is not accessible in the current state. This can happen when the device is in non M0 state, like M3, and needs to be waken-up pri...

CVE-2021-46969

CVE-2021-46969 affects the Linux kernel bus: mhi: core. The vulnerability arises when mhi_queue incorrectly returns an error if the doorbell is not accessible in a non-M0 state (e.g., M3). The device is awakened to M0 before updating the doorbell, and treating this as an error delayed the doorbel...