Re: [PATCH v3 1/2] spi: qcom-geni: Add shutdown callback to quiesce hardware on reboot

[Mukesh Savaliya]

On 8/18/2026 6:58 PM, Praveen Talari wrote:
> During system reboot, an active SPI transfer can leave the GENI Serial
> Engine in an indeterminate state. On VM-based platforms, if a DMA
> transfer is in progress when the VM is shut down, the SMMU can raise
> context faults as the DMA engine continues to access IOVAs that have
> already been invalidated during VM teardown.
>
> Add a shutdown callback to suspend the SPI controller and abort any
> in-progress transfer, ensuring the DMA engine is idle and all IOVA
> mappings are retired before the system resets.
>
> Signed-off-by: Praveen Talari <praveen.talari@xxxxxxxxxxxxxxxx>
> ---
Reviewed-by: Mukesh Kumar Savaliya <mukesh.savaliya@xxxxxxxxxxxxxxxx>