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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 <[email protected]>
Suggested-by: Rafael J. Wysocki <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>
Reviewed-by: Jean Delvare <[email protected]>
Reviewed-by: Rafael J. Wysocki <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Lukas Wunner <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rafael J . Wysocki <[email protected]>
Cc: [email protected]
Cc: [email protected]
Fixes: 492a1abd61 ("dmi: Introduce the dmi_get_bios_year() helper function")
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Andy Shevchenko 2018-03-20 20:07:59 +02:00 • committed by Ingo Molnar
commit 3af3452586
2 changed files with 22 additions and 9 deletions
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20
drivers/firmware/dmi_scan.c
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@ -1004,6 +1004,26 @@ out:
}
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