Re: [PATCH v3] bus: mhi: host: pci_generic: Update the default autosuspend_delay_ms as 5000ms

[Jeff Hugo]

On 10/21/2026 4:54 AM, Slark Xiao wrote:
> For some MHI devices in some specific scenarios, the default value
> of autosuspend_delay_ms may not be enough to handle the last wake
> event, potentially leading to device timeout or link drop issues.
> This can lead to a runtime resume failure and a subsequent system
> error:
>
>    [ 8749.089545] mhi mhi0: Resuming from non M3 state (SYS ERROR)
>    [ 8749.089573] mhi-pci-generic 0000:73:00.0: failed to resume device: -22
>    [ 8749.090218] mhi-pci-generic 0000:73:00.0: device recovery started
>    ...
>    [ 8752.940324] mhi-pci-generic 0000:73:00.0: reset failed
>
> Following Qualcomm's recommended settings from Windows and their
> suggestion during case discussions, update the default autosuspend
> delay to 5000ms for MHI devices.
>
> Fixes: d3800c1dce24 ("bus: mhi: pci_generic: Add support for runtime PM")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Slark Xiao <slark_xiao@xxxxxxx>
Reviewed-by: Jeff Hugo <jeff.hugo@xxxxxxxxxxxxxxxx>