On Thu, Jul 06, 2017 at 10:31:38AM +0200, Romain Perier wrote:

Hello,


Le 05/07/2017 ? 15:29, Uwe Kleine-K?nig a ?crit :

quoted

Hello,

On Wed, Jul 05, 2017 at 03:07:01PM +0200, Romain Perier wrote:

quoted

From: Nandor Han <redacted>

Avoid the situation when `dma_is_rxing` could incorrectly signal that
DMA RX channel is receiving data in case DMA preparation or sg mapping
fails.

This commit fixes the issues by moving the assignment of dma_is_rxing
out of imx_disable_rx_int(), then the variable is set to 1 from
start_rx_dma() only when the preparation is correctly done.

I'd write:

	There are a few issues with setting dma_is_rxing to 1 in
	imx_disable_rx_int:

	 - Currently always after imx_disable_rx_int() the function
	   start_rx_dma() is called. This dependency isn't obvious though.
	 - start_rx_dma() does error checking and might exit without enabling
	   DMA but keeping dma_is_rxing 1.

	So the more natural place for setting dma_is_rxing to 1 is in
	start_rx_dma after all errors are checked.

If you use this, there is nothing left of Nandor Han's patch and you can
drop his authorship.

Best regards
Uwe

Ok, will do. No other feedback for the rest of the series ? (just to
know if I send a v3 or If I wait a bit...)

I didn't come around looking in the patches I didn't comment yet.

Best regards
Uwe

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Pengutronix e.K.                           | Uwe Kleine-K?nig            |
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