linux-kernel - [PATCH 1/2] DMA: PL330: Remove pm_runtime

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Date:	Tue,  6 Dec 2011 16:15:54 +0530
From:	Tushar Behera <tushar.behera@...aro.org>
To:	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	kgene.kim@...sung.com, vinod.koul@...el.com,
	linaro-dev@...ts.linaro.org, patches@...aro.org
Subject: [PATCH 1/2] DMA: PL330: Remove pm_runtime_xxx calls from pl330 probe/remove

amba_probe() now calls pm_runtime_get_noresume() and pm_runtime_enable()
for the devices before the device probe is called. Hence we don't need
to call pm_runtime_get_xxx and pm_runtime_enable() in device probe again.
In the same way, since amba_remove() calls the respective pm_runtime
functions, those functions need not be called from device remove.

This patch fixes following run time error with pl330 driver.

dma-pl330 dma-pl330.0: Unbalanced pm_runtime_enable!
dma-pl330 dma-pl330.0: failed to get runtime pm

Signed-off-by: Giridhar Maruthy <giridhar.maruthy@...aro.org>
Signed-off-by: Tushar Behera <tushar.behera@...aro.org>
---
 drivers/dma/pl330.c |   17 ++---------------
 1 files changed, 2 insertions(+), 15 deletions(-)

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index a626e15..cd07121 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -834,17 +834,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
 
 	amba_set_drvdata(adev, pdmac);
 
-#ifdef CONFIG_PM_RUNTIME
-	/* to use the runtime PM helper functions */
-	pm_runtime_enable(&adev->dev);
-
-	/* enable the power domain */
-	if (pm_runtime_get_sync(&adev->dev)) {
-		dev_err(&adev->dev, "failed to get runtime pm\n");
-		ret = -ENODEV;
-		goto probe_err1;
-	}
-#else
+#ifndef CONFIG_PM_RUNTIME
 	/* enable dma clk */
 	clk_enable(pdmac->clk);
 #endif
@@ -977,10 +967,7 @@ static int __devexit pl330_remove(struct amba_device *adev)
 	res = &adev->res;
 	release_mem_region(res->start, resource_size(res));
 
-#ifdef CONFIG_PM_RUNTIME
-	pm_runtime_put(&adev->dev);
-	pm_runtime_disable(&adev->dev);
-#else
+#ifndef CONFIG_PM_RUNTIME
 	clk_disable(pdmac->clk);
 #endif
 
-- 
1.7.4.1

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