From 3af345258617e0412059c1ab6462495947f73e89 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 20 Mar 2018 20:07:59 +0200 Subject: [PATCH] firmware/dmi_scan: Uninline dmi_get_bios_year() helper 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 Suggested-by: Rafael J. Wysocki Signed-off-by: Andy Shevchenko Reviewed-by: Jean Delvare Reviewed-by: Rafael J. Wysocki Acked-by: Thomas Gleixner Cc: Bjorn Helgaas Cc: Linus Torvalds Cc: Lukas Wunner Cc: Peter Zijlstra Cc: Rafael J . Wysocki Cc: linux-acpi@vger.kernel.org Cc: linux-pci@vger.kernel.org Fixes: 492a1abd61e4 ("dmi: Introduce the dmi_get_bios_year() helper function") Signed-off-by: Ingo Molnar --- drivers/firmware/dmi_scan.c | 20 ++++++++++++++++++++ include/linux/dmi.h | 11 ++--------- 2 files changed, 22 insertions(+), 9 deletions(-) diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index e763e1484331..e35c5e04c46a 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -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 diff --git a/include/linux/dmi.h b/include/linux/dmi.h index 0bade156e908..6a86d8db16d9 100644 --- a/include/linux/dmi.h +++ b/include/linux/dmi.h @@ -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__ */