Re: [PATCH RESEND 2/2] serial: 8250: omap: Move pm_runtime_get_sync

[Kevin Hilman <khilman@kernel.org>]

Judith Mendez <jm@ti.com> writes:

> Currently in omap_8250_shutdown, the dma->rx_running
> flag is set to zero in omap_8250_rx_dma_flush. Next
> pm_runtime_get_sync is called, which is a runtime
> resume call stack which can re-set the flag. When the
> call omap_8250_shutdown returns, the flag is expected
> to be UN-SET, but this is not the case. This is causing
> issues the next time UART is re-opened and omap_8250_rx_dma
> is called. Fix by moving pm_runtime_get_sync before the
> omap_8250_rx_dma_flush.
>
> Signed-off-by: Bin Liu <b-liu@ti.com>
> Signed-off-by: Judith Mendez <jm@ti.com>

Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>

Gave this a quick boot test on am335x-boneblack and am57xx-beagle-x15.

I realize that doesn't really test the DMA paths involved here, but at
least it doesn't break basic boot to serial console, and the change
looks coorect.

Thanks for sending a fix for this.

Kevin