linux-kernel - [PATCH] mfd: Fix omap_usbhs_alloc

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Date:	Sat, 14 May 2011 14:15:36 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Keshava Munegowda <keshava_mgowda@...com>,
	Felipe Balbi <balbi@...com>,
	Samuel Ortiz <sameo@...ux.intel.com>
Subject: [PATCH] mfd: Fix omap_usbhs_alloc_children error handling

1. Return proper error if omap_usbhs_alloc_child fails
2. In the case of goto err_ehci, we should call platform_device_unregister(ehci)
   instead of platform_device_put(ehci) because we have already added the
   platform device to device hierarchy.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/mfd/omap-usb-host.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 3ab9ffa..344f518 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -281,6 +281,7 @@ static int omap_usbhs_alloc_children(struct platform_device *pdev)
 
 	if (!ehci) {
 		dev_err(dev, "omap_usbhs_alloc_child failed\n");
+		ret = -ENOMEM;
 		goto err_end;
 	}
 
@@ -304,13 +305,14 @@ static int omap_usbhs_alloc_children(struct platform_device *pdev)
 		sizeof(*ohci_data), dev);
 	if (!ohci) {
 		dev_err(dev, "omap_usbhs_alloc_child failed\n");
+		ret = -ENOMEM;
 		goto err_ehci;
 	}
 
 	return 0;
 
 err_ehci:
-	platform_device_put(ehci);
+	platform_device_unregister(ehci);
 
 err_end:
 	return ret;
-- 
1.7.1



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