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authorJean Delvare <khali@linux-fr.org>2011-11-16 02:36:09 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-16 04:41:51 +0400
commit66e13e66b6c4e5b2ecd6225e1f8437640cfb6498 (patch)
treef84eda181ba94a3d9040e0f14399bd426dfc02be /drivers/firmware
parent5aecc85abdb9ac2b0e6548d13652a34142e7ae89 (diff)
downloadlinux-66e13e66b6c4e5b2ecd6225e1f8437640cfb6498.tar.xz
drivers/firmware/dmi_scan.c: make dmi_name_in_vendors more focused
The current implementation of dmi_name_in_vendors() is an invitation to lazy coding and false positives [1]. Searching for a string in 8 know what you're looking for, so you should know where to look. strstr isn't fast, especially when it fails, so we should avoid calling it when it just can't succeed. Looking at the current users of the function, it seems clear to me that they are looking for a system or board vendor name, so let's limit dmi_name_in_vendors to these two DMI fields. This much better matches the function name, BTW. [1] We currently have code looking for short names in DMI data, such as "IBM", "ASUS" or "Acer". I let you guess what will happen the day other vendors ship products named, for example, "SCHREIBMEISTER", "PEGASUS" or "Acerola". Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/dmi_scan.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index bcb1126e3d00..153980be4ee6 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -585,14 +585,12 @@ int dmi_name_in_serial(const char *str)
}
/**
- * dmi_name_in_vendors - Check if string is anywhere in the DMI vendor information.
+ * dmi_name_in_vendors - Check if string is in the DMI system or board vendor name
* @str: Case sensitive Name
*/
int dmi_name_in_vendors(const char *str)
{
- static int fields[] = { DMI_BIOS_VENDOR, DMI_BIOS_VERSION, DMI_SYS_VENDOR,
- DMI_PRODUCT_NAME, DMI_PRODUCT_VERSION, DMI_BOARD_VENDOR,
- DMI_BOARD_NAME, DMI_BOARD_VERSION, DMI_NONE };
+ static int fields[] = { DMI_SYS_VENDOR, DMI_BOARD_VENDOR, DMI_NONE };
int i;
for (i = 0; fields[i] != DMI_NONE; i++) {
int f = fields[i];