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isa: Dummy isa_register_driver should return error code 

The inline isa_register_driver stub simply allows compilation on systems
with CONFIG_ISA disabled; the dummy isa_register_driver does not
register an isa_driver at all. The inline isa_register_driver should
return -ENODEV to indicate lack of support when attempting to register
an isa_driver on such a system with CONFIG_ISA disabled.

Cc: Matthew Wilcox <matthew@wil.cx>
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Tested-by: Ye Xiaolong
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
William Breathitt Gray 2016-05-09 09:39:50 -04:00 committed by Greg Kroah-Hartman
parent 32a5a0c047
commit 5e25db870e
1 changed files with 2 additions and 1 deletions
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3
include/linux/isa.h
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@ -6,6 +6,7 @@
#define __LINUX_ISA_H
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/kernel.h>
struct isa_driver {
@ -28,7 +29,7 @@ void isa_unregister_driver(struct isa_driver *);
#else
static inline int isa_register_driver(struct isa_driver *d, unsigned int i)
{
return 0;
return -ENODEV;
}
static inline void isa_unregister_driver(struct isa_driver *d)