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Date: Wed, 29 Oct 2014 00:06:54 +0200 From: Laurent Pinchart <laurent.pinchart@...asonboard.com> To: Maxime Ripard <maxime.ripard@...e-electrons.com> Cc: Vinod Koul <vinod.koul@...el.com>, dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, Antoine Ténart <antoine@...e-electrons.com>, Russell King <linux@....linux.org.uk>, lars@...afoo.de Subject: Re: [PATCH v4 57/58] dmaengine: Add a warning for drivers not using the generic slave caps retrieval Hi Maxime, Thank you for the patch. On Tuesday 28 October 2014 22:26:12 Maxime Ripard wrote: > For the slave caps retrieval to be really useful, most drivers need to > implement it. > > Hence, we need to be slightly more aggressive, and trigger a warning at > registration time for drivers that don't fill their caps infos in order to > encourage them to implement it. > > Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com> Acked-by: Laurent Pinchart <laurent.pinchart@...asonboard.com> > --- > drivers/dma/dmaengine.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c > index 98e9431f85ec..300c8cd2786c 100644 > --- a/drivers/dma/dmaengine.c > +++ b/drivers/dma/dmaengine.c > @@ -827,6 +827,9 @@ int dma_async_device_register(struct dma_device *device) > BUG_ON(!device->device_issue_pending); > BUG_ON(!device->dev); > > + WARN(dma_has_cap(DMA_SLAVE, device->cap_mask) && !device->directions, > + "this driver doesn't support generic slave capabilities > reporting\n"); + > /* note: this only matters in the > * CONFIG_ASYNC_TX_ENABLE_CHANNEL_SWITCH=n case > */ -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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