linux-kernel - [ 090/187] dmaengine: pl330: dont complete descriptor for cyclic dma

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Message-Id: <20120712191530.754856286@linuxfoundation.org>
Date:	Thu, 12 Jul 2012 15:34:06 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Tushar Behera <tushar.behera@...aro.org>,
	Jassi Brar <jaswinder.singh@...aro.org>,
	Vinod Koul <vinod.koul@...ux.intel.com>
Subject: [ 090/187] dmaengine: pl330: dont complete descriptor for cyclic dma

From: Greg KH <gregkh@...uxfoundation.org>

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tushar Behera <tushar.behera@...aro.org>

commit 30c1dc0ff30b5552e8af555265dbeac5637cbb48 upstream.

Commit eab215855803 ("dmaengine: pl330: dont complete descriptor for
cyclic dma") wrongly completes descriptor for cyclic dma, hence following
BUG_ON is still hit with cyclic DMA operations.

kernel BUG at drivers/dma/dmaengine.h:53!

Signed-off-by: Tushar Behera <tushar.behera@...aro.org>
Acked-by: Jassi Brar <jaswinder.singh@...aro.org>
Signed-off-by: Vinod Koul <vinod.koul@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/dma/pl330.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2322,7 +2322,7 @@ static void pl330_tasklet(unsigned long
 	/* Pick up ripe tomatoes */
 	list_for_each_entry_safe(desc, _dt, &pch->work_list, node)
 		if (desc->status == DONE) {
-			if (pch->cyclic)
+			if (!pch->cyclic)
 				dma_cookie_complete(&desc->txd);
 			list_move_tail(&desc->node, &list);
 		}


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