diff options
| author | Jani Nikula <jani.nikula@intel.com> | 2013-07-03 15:05:02 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-05-18 14:58:06 +0100 |
| commit | f632e3515cdb3463fb1ad6f4b6f0f8525fb41a25 (patch) | |
| tree | 11105b0ba0a04be392367ca19f5c658fad6a2889 /include/linux/mod_devicetable.h | |
| parent | b8309464fb222570eadd3e9d4668dd1f01ad8189 (diff) | |
dmi: add support for exact DMI matches in addition to substring matching
commit 5017b2851373ee15c7035151853bb1448800cae2 upstream.
dmi_match() considers a substring match to be a successful match. This is
not always sufficient to distinguish between DMI data for different
systems. Add support for exact string matching using strcmp() in addition
to the substring matching using strstr().
The specific use case in the i915 driver is to allow us to use an exact
match for D510MO, without also incorrectly matching D510MOV:
{
.ident = "Intel D510MO",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "D510MO"),
},
}
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Cc: <annndddrr@gmail.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Cornel Panceac <cpanceac@gmail.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include/linux/mod_devicetable.h')
| -rw-r--r-- | include/linux/mod_devicetable.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h index 468819cdde87..226e0ff90e61 100644 --- a/include/linux/mod_devicetable.h +++ b/include/linux/mod_devicetable.h @@ -461,7 +461,8 @@ enum dmi_field { }; struct dmi_strmatch { - unsigned char slot; + unsigned char slot:7; + unsigned char exact_match:1; char substr[79]; }; @@ -489,7 +490,8 @@ struct dmi_system_id { #define dmi_device_id dmi_system_id #endif -#define DMI_MATCH(a, b) { a, b } +#define DMI_MATCH(a, b) { .slot = a, .substr = b } +#define DMI_EXACT_MATCH(a, b) { .slot = a, .substr = b, .exact_match = 1 } #define PLATFORM_NAME_SIZE 20 #define PLATFORM_MODULE_PREFIX "platform:" |