linux-kernel - [PATCH V1 Resend 2/3] dmaengine/dw_dmac: Set channel id's in controller driver

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Date:	Mon, 19 Dec 2011 10:00:59 +0530
From:	Viresh Kumar <viresh.kumar@...com>
To:	<dan.j.williams@...el.com>, <vinod.koul@...el.com>
Cc:	<linux-kernel@...r.kernel.org>, <armando.visconti@...com>,
	<shiraz.hashim@...com>, <vipin.kumar@...com>,
	<rajeev-dlh.kumar@...com>, <deepak.sikri@...com>,
	<vipulkumar.samar@...com>, <amit.virdi@...com>,
	<viresh.kumar@...com>, <pratyush.anand@...com>,
	<bhupesh.sharma@...com>, <viresh.linux@...il.com>,
	<bhavna.yadav@...com>, <vincenzo.frascino@...com>,
	<mirko.gardi@...com>
Subject: [PATCH V1 Resend 2/3] dmaengine/dw_dmac: Set channel id's in controller driver

dw_dmac may conditionally add channels in reverse order inside channel list in
struct dma_device. So, we must set chan_id's here and pass this to dmaengine, so
that it doesn't override these values.

Signed-off-by: Viresh Kumar <viresh.kumar@...com>
---
 drivers/dma/dw_dmac.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 9b592b0..35c8829 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -1417,6 +1417,7 @@ static int __init dw_probe(struct platform_device *pdev)
 	tasklet_init(&dw->tasklet, dw_dma_tasklet, (unsigned long)dw);
 
 	dw->all_chan_mask = (1 << pdata->nr_channels) - 1;
+	dw->dma.chan_ids_set = true;
 
 	INIT_LIST_HEAD(&dw->dma.channels);
 	for (i = 0; i < pdata->nr_channels; i++) {
@@ -1424,6 +1425,7 @@ static int __init dw_probe(struct platform_device *pdev)
 
 		dwc->chan.device = &dw->dma;
 		dwc->chan.cookie = dwc->completed = 1;
+		dwc->chan.chan_id = i;
 		if (pdata->chan_allocation_order == CHAN_ALLOCATION_ASCENDING)
 			list_add_tail(&dwc->chan.device_node,
 					&dw->dma.channels);
-- 
1.7.8.110.g4cb5d

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