Hi!

> From: Geert Uytterhoeven <geert+renesas@glider.be>
> 
> commit 775b7ffd7d6d5db320d99b0a485c51e04dfcf9f1 upstream.
> 
> While the .flush_buffer() callback clears sci_port.tx_dma_len since
> commit 1cf4a7efdc71cab8 ("serial: sh-sci: Fix race condition causing
> garbage during shutdown"), it does not terminate a transmit DMA
> operation that may be in progress.
> 
> Fix this by terminating any pending DMA operations, and resetting the
> corresponding cookie.

What is the impact of the bug? DMA running during reboot, but not
doing any harm?

Anyway, this looks okay to me.

Best regards,
								Pavel

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