linux-kernel - [RFC patch] DMA engine/Langwell: process pending descriptors

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Date:	Wed, 27 Jul 2011 21:24:51 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	Vinod Koul <vinod.koul@...el.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: [RFC patch] DMA engine/Langwell: process pending descriptors

Descriptors could be added onto the queue list, though pending descriptors are
checked in intel_mid_dma_issue_pending(), they are not processed by scanning
the queue list.
In this work scanning the queue list is added in midc_scan_descriptors().

Signed-off-by: Hillf Danton <dhillf@...il.com>
---
 drivers/dma/intel_mid_dma.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c
index f653517..a176fb9 100644
--- a/drivers/dma/intel_mid_dma.c
+++ b/drivers/dma/intel_mid_dma.c
@@ -338,8 +338,11 @@ static void midc_scan_descriptors(struct
middma_device *mid,
 		if (desc->status == DMA_IN_PROGRESS)
 			midc_descriptor_complete(midc, desc);
 	}
-	return;
+	list_for_each_entry_safe(desc, _desc, &midc->queue, desc_node) {
+		if (desc->status == DMA_IN_PROGRESS)
+			midc_descriptor_complete(midc, desc);
 	}
+}
 /**
  * midc_lli_fill_sg -		Helper function to convert
  *				SG list to Linked List Items.
--
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