diff options
| author | Jani Nikula <jani.nikula@intel.com> | 2013-07-03 15:05:02 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-29 11:11:53 -0800 |
| commit | e3e129e720552f0dbc8ad363f8e85120219dac94 (patch) | |
| tree | 0d5474bfd9bd35623736f93001272e49cce4c940 /drivers/firmware | |
| parent | a8e25439e373f9e2ec3ad7db6ddf0e32429d9ec0 (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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/dmi_scan.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index b95159b33c3..eb760a218da 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -551,9 +551,15 @@ static bool dmi_matches(const struct dmi_system_id *dmi) int s = dmi->matches[i].slot; if (s == DMI_NONE) break; - if (dmi_ident[s] - && strstr(dmi_ident[s], dmi->matches[i].substr)) - continue; + if (dmi_ident[s]) { + if (!dmi->matches[i].exact_match && + strstr(dmi_ident[s], dmi->matches[i].substr)) + continue; + else if (dmi->matches[i].exact_match && + !strcmp(dmi_ident[s], dmi->matches[i].substr)) + continue; + } + /* No match */ return false; } |