linux-kernel - [PATCH v5 1/1] usb: ulpi: ulpi_init should be executed in subsys

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Date:	Thu,  4 Jun 2015 20:44:14 +0800
From:	Lu Baolu <baolu.lu@...ux.intel.com>
To:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>, balbi@...com,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH v5 1/1] usb: ulpi: ulpi_init should be executed in subsys_initcall

Phy drivers and the ulpi interface providers depend on the
registration of the ulpi bus.  Ulpi registers the bus in
module_init(). This could cause unnecessary bus users'
probe delays. i.e. unnecessary -EPROBE_DEFER happening on
ulpi_drivers in case they're registered before ulpi bus
itself.

Reported-by: Zhuo Qiuxu <qiuxu.zhuo@...el.com>
Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
Acked-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
---
 drivers/usb/common/ulpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

v0->v5 change log:
Various changes in the commit description.

diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c
index 0e6f968..01c0c04 100644
--- a/drivers/usb/common/ulpi.c
+++ b/drivers/usb/common/ulpi.c
@@ -242,7 +242,7 @@ static int __init ulpi_init(void)
 {
 	return bus_register(&ulpi_bus);
 }
-module_init(ulpi_init);
+subsys_initcall(ulpi_init);
 
 static void __exit ulpi_exit(void)
 {
-- 
2.1.4

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