Messages in this thread Patch in this message | | | Date | Tue, 26 Jan 2010 15:34:26 -0800 | From | Greg KH <> | Subject | [60/98] DMI: allow omitting ident strings in DMI tables |
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2.6.32-stable review patch. If anyone has any objections, please let us know.
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From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
commit 75757507e014fa074d25d2883c4ab604999584bd upstream.
The purpose of dmi->ident is twofold - it may be used by DMI callback functions when composing log messages; it is also used to determine end of DMI table in dmi_check_system() and dmi_first_match(). However, in case when callbacks are not interested in using ident at all it just wastes memory. Let's make entries with empty first match slot serve as end-of-table markers instead.
[needed for DMI table changes that need to be done by later patches - gkh]
Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/firmware/dmi_scan.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-)
--- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -429,7 +429,7 @@ static bool dmi_matches(const struct dmi for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) { int s = dmi->matches[i].slot; if (s == DMI_NONE) - continue; + break; if (dmi_ident[s] && strstr(dmi_ident[s], dmi->matches[i].substr)) continue; @@ -440,6 +440,15 @@ static bool dmi_matches(const struct dmi } /** + * dmi_is_end_of_table - check for end-of-table marker + * @dmi: pointer to the dmi_system_id structure to check + */ +static bool dmi_is_end_of_table(const struct dmi_system_id *dmi) +{ + return dmi->matches[0].slot == DMI_NONE; +} + +/** * dmi_check_system - check system DMI data * @list: array of dmi_system_id structures to match against * All non-null elements of the list must match @@ -457,7 +466,7 @@ int dmi_check_system(const struct dmi_sy int count = 0; const struct dmi_system_id *d; - for (d = list; d->ident; d++) + for (d = list; !dmi_is_end_of_table(d); d++) if (dmi_matches(d)) { count++; if (d->callback && d->callback(d)) @@ -484,7 +493,7 @@ const struct dmi_system_id *dmi_first_ma { const struct dmi_system_id *d; - for (d = list; d->ident; d++) + for (d = list; !dmi_is_end_of_table(d); d++) if (dmi_matches(d)) return d;
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