Wrap `Cmdq`'s mutable state in a new struct `CmdqInner` and wrap that in
a Mutex. This lets `Cmdq` methods take &self instead of &mut self, which
lets required commands be sent e.g. while unloading the driver.
The mutex is held over both send and receive in `send_command` to make
sure that it doesn't get the reply of some other command that could have
been sent just beforehand.
Reviewed-by: Zhi Wang <zhiw@nvidia.com>
Tested-by: Zhi Wang <zhiw@nvidia.com>
Signed-off-by: Eliot Courtney <ecourtney@nvidia.com>
Link: https://patch.msgid.link/20260318-cmdq-locking-v5-5-18b37e3f9069@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
a19457958c