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vme: Convert VME core to register as a subsystem 

Previously, VME bridge support was treated as any other driver (using
module_init() macro), but if VME bridge and vme_user (staging) drivers
were compiled into the kernel, then vme_user would attempt to register
itself before the VME core support had been loaded. This would result
in a kernel panic.

The load order of these built-in drivers is based on the order in which
drivers/staging/vme and driver/vme are compiled.

This patch changes the VME core driver to use the subsys_initcall()
macro which ensures that it is loaded before all other VME drivers
regardless of the order in which they are compiled.

Tested-by: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Martyn Welch <martyn.welch@ge.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aaron Sierra 2013-12-09 09:54:42 -06:00 committed by Greg Kroah-Hartman
parent e56b140105
commit c326cc023e
2 changed files with 2 additions and 6 deletions
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2
drivers/vme/Kconfig
View File

@ -3,7 +3,7 @@
# #
menuconfig VME_BUS menuconfig VME_BUS
tristate "VME bridge support" bool "VME bridge support"
depends on PCI depends on PCI
---help--- ---help---
If you say Y here you get support for the VME bridge Framework. If you say Y here you get support for the VME bridge Framework.

6
drivers/vme/vme.c
View File

@ -1525,9 +1525,5 @@ static void __exit vme_exit(void)
bus_unregister(&vme_bus_type); bus_unregister(&vme_bus_type);
} }
MODULE_DESCRIPTION("VME bridge driver framework"); subsys_initcall(vme_init);
MODULE_AUTHOR("Martyn Welch <martyn.welch@ge.com");
MODULE_LICENSE("GPL");
module_init(vme_init);
module_exit(vme_exit); module_exit(vme_exit);