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firmware/dmi_scan: Uninline dmi_get_bios_year() helper

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Uninline dmi_get_bios_year() which, in particular, allows us
to optimize it in the future.

While doing this, convert the function to return an error code
when BIOS date is not present or not parsable, or CONFIG_DMI=n.

Additionally, during the move, add a bit of documentation.

Suggested-by: Bjorn Helgaas <helgaas@kernel.org>
Suggested-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J . Wysocki <rjw@rjwysocki.net>
Cc: linux-acpi@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Fixes: 492a1abd61 ("dmi: Introduce the dmi_get_bios_year() helper function")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Andy Shevchenko 2018-03-20 20:07:59 +02:00 committed by Ingo Molnar
parent 4e07db9c8d
commit 3af3452586
2 changed files with 22 additions and 9 deletions
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20
drivers/firmware/dmi_scan.c
View File

@ -1004,6 +1004,26 @@ bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp)
}
EXPORT_SYMBOL(dmi_get_date);
/**
* dmi_get_bios_year - get a year out of DMI_BIOS_DATE field
*
* Returns year on success, -ENXIO if DMI is not selected,
* or a different negative error code if DMI field is not present
* or not parseable.
*/
int dmi_get_bios_year(void)
{
bool exists;
int year;
exists = dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL);
if (!exists)
return -ENODATA;
return year ? year : -ERANGE;
}
EXPORT_SYMBOL(dmi_get_bios_year);
/**
* dmi_walk - Walk the DMI table and get called back for every record
* @decode: Callback function

11
include/linux/dmi.h
View File

@ -106,6 +106,7 @@ extern void dmi_scan_machine(void);
extern void dmi_memdev_walk(void);
extern void dmi_set_dump_stack_arch_desc(void);
extern bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp);
extern int dmi_get_bios_year(void);
extern int dmi_name_in_vendors(const char *str);
extern int dmi_name_in_serial(const char *str);
extern int dmi_available;
@ -133,6 +134,7 @@ static inline bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp)
*dayp = 0;
return false;
}
static inline int dmi_get_bios_year(void) { return -ENXIO; }
static inline int dmi_name_in_vendors(const char *s) { return 0; }
static inline int dmi_name_in_serial(const char *s) { return 0; }
#define dmi_available 0
@ -147,13 +149,4 @@ static inline const struct dmi_system_id *
#endif
static inline int dmi_get_bios_year(void)
{
int year;
dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL);
return year;
}
#endif /* __DMI_H__ */