linux-kernel - Re: [PATCH] dmaengine/dmatest: terminate transfers only in case of errors

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Date:	Fri, 9 Nov 2012 18:44:18 +0000
From:	Dan Williams <djbw@...com>
To:	Viresh Kumar <viresh.kumar@...aro.org>,
	"vinod.koul@...el.com" <vinod.koul@...el.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"spear-devel@...t.st.com" <spear-devel@...t.st.com>,
	Shiraz Hashim <shiraz.hashim@...com>,
	Deepak Sikri <deepak.sikri@...com>,
	"jon.mason@...el.com" <jon.mason@...el.com>,
	"dave.jiang@...el.com" <dave.jiang@...el.com>
Subject: Re: [PATCH] dmaengine/dmatest: terminate transfers only in case of
 errors



On 11/9/12 7:26 AM, "Viresh Kumar" <viresh.kumar@...aro.org> wrote:

>From: Shiraz Hashim <shiraz.hashim@...com>
>
>dmatest erroneously terminated transfers in normal cases also leading to
>test failures for multiple threads over a channel. Fix this and
>terminate transfers only in case of errors.
>
>Signed-off-by: Shiraz Hashim <shiraz.hashim@...com>
>Signed-off-by: Deepak Sikri <deepak.sikri@...com>
>---
> drivers/dma/dmatest.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
>index 8f130d4e..ce58b8e 100644
>--- a/drivers/dma/dmatest.c
>+++ b/drivers/dma/dmatest.c
>@@ -509,7 +509,9 @@ err_srcs:
> 			thread_name, total_tests, failed_tests, ret);
> 
> 	/* terminate all transfers on specified channels */
>-	chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
>+	if (ret)
>+		chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
>+

This and commit 9704efa "dmaengine/dmatest: Terminate transfers on all
channels in case of error or exit" are broken for channels that don't
implement the optional ->device_control.  Care to fix that up?


--
Dan

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