Re: [PATCH v5] mailbox: Make mbox_send_message() return error code when tx fails

[Jassi Brar]

On Fri, May 8, 2026 at 4:02 AM Joonwon Kang <joonwonkang@xxxxxxxxxx> wrote:
>
> When the mailbox controller failed transmitting message, the error code
> was only passed to the client's tx done handler and not to
> mbox_send_message() in blocking mode. For this reason, the function could
> return a false success. This commit resolves the issue by introducing the
> tx status and checking it before mbox_send_message() returns.
>
> This commit works with the premise that the multi-threads' access to a
> channel in blocking mode is serialized by clients, not by the mailbox
> APIs, since the current mbox_send_message() in blocking mode does not
> support multi-threads.
>
> Cc: stable@xxxxxxxxxxxxxxx
>
Not sure if this should go into stable. It is not a bug fix. See
stable-kernel-rules

Thanks,
Jassi