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a19457958c
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>