linux-kernel - [ 037/167] [PATCH] usb: musb: omap: fix crash when musb glue (omap) gets initialized

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Message-Id: <20120509055034.752013456@decadent.org.uk>
Date:	Wed, 09 May 2012 06:51:06 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Kishon Vijay Abraham I <kishon@...com>,
	Felipe Balbi <balbi@...com>
Subject: [ 037/167] [PATCH] usb: musb: omap: fix crash when musb glue (omap) gets
 initialized

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

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

From: Kishon Vijay Abraham I <kishon@...com>

commit 3006dc8c627d738693e910c159630e4368c9e86c upstream.

pm_runtime_enable is being called after omap2430_musb_init. Hence
pm_runtime_get_sync in omap2430_musb_init does not have any effect (does
not enable clocks) resulting in a crash during register access. It is
fixed here.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
Signed-off-by: Felipe Balbi <balbi@...com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/usb/musb/omap2430.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 3dfd122..0fb4ce8 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -453,14 +453,14 @@ static int __devinit omap2430_probe(struct platform_device *pdev)
 		goto err2;
 	}
 
+	pm_runtime_enable(&pdev->dev);
+
 	ret = platform_device_add(musb);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register musb device\n");
 		goto err2;
 	}
 
-	pm_runtime_enable(&pdev->dev);
-
 	return 0;
 
 err2:
-- 
1.7.10



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