From 75757507e014fa074d25d2883c4ab604999584bd Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Fri, 4 Dec 2009 10:24:19 -0800 Subject: [PATCH] DMI: allow omitting ident strings in DMI tables 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. Acked-by: Jean Delvare Signed-off-by: Dmitry Torokhov --- drivers/firmware/dmi_scan.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index 938100f14b16..3a2ccb09e2f8 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -429,7 +429,7 @@ static bool dmi_matches(const struct dmi_system_id *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; @@ -439,6 +439,15 @@ static bool dmi_matches(const struct dmi_system_id *dmi) return true; } +/** + * 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 @@ -457,7 +466,7 @@ int dmi_check_system(const struct dmi_system_id *list) 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_match(const struct dmi_system_id *list) { 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; -- 2.39.5