linux-kernel - [PATCH 16/16] phy: phy-core: fix initcall level

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Date:	Wed, 26 Aug 2015 14:28:28 +0200
From:	Alexander Holler <holler@...oftware.de>
To:	linux-kernel@...r.kernel.org
Cc:	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	Greg KH <gregkh@...uxfoundation.org>,
	Russel King <linux@....linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Grant Likely <grant.likely@...aro.org>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Alexander Holler <holler@...oftware.de>,
	Kishon Vijay Abraham I <kishon@...com>
Subject: [PATCH 16/16] phy: phy-core: fix initcall level

The phy-core has to be initialized before other dependent usb-drivers,
otherwise a crash might occur.

Currently phy_core_init() is called in the initcall-level device, which is
the same level where most usb-drivers will end up. By luck this seemed to
have been called most of the time before other usb-drivers without having
been explicitly enforced. But if phy_core_init() is not called before a
dependent driver, a null-pointer exception might occur (e.g. because the
phy device class isn't registered).

To fix this, phy_core_init() is moved to the initcall-level fs (right
before the standard initcall level device).

Signed-off-by: Alexander Holler <holler@...oftware.de>
---
 drivers/phy/phy-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index fc48fac..4945029 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -930,7 +930,7 @@ static int __init phy_core_init(void)

 	return 0;
 }
-module_init(phy_core_init);
+fs_initcall_sync(phy_core_init);

 static void __exit phy_core_exit(void)
 {
-- 
2.1.0

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