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authorPeter Feuerer <peter@piie.net>2009-12-21 16:20:06 -0800
committerLen Brown <len.brown@intel.com>2009-12-24 00:17:09 -0500
commitdcbfb8156a2149fd6358a377aa9400e28ef43800 (patch)
tree6ad406b1c74d29f838b655fbff71f4a2bcf3ade2
parent94219d798e65dff1dac5f8f36f03a9bdb3105f91 (diff)
downloadlinux-linaro-dcbfb8156a2149fd6358a377aa9400e28ef43800.tar.gz
drivers/platform/x86/acerhdf.c: check BIOS information whether it begins with string of table
BIOS information is now checked whether it begins with the strings stored in the BIOS table. Previous method did a strcmp, what lead to problems if BIOS information has appended whitespaces. Signed-off-by: Peter Feuerer <peter@piie.net> Cc: Borislav Petkov <petkovbb@gmail.com> Cc: Andreas Mohr <andi@lisas.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
-rw-r--r--drivers/platform/x86/acerhdf.c46
1 files changed, 28 insertions, 18 deletions
diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
index a97fc4a7c60..7b2384d674d 100644
--- a/drivers/platform/x86/acerhdf.c
+++ b/drivers/platform/x86/acerhdf.c
@@ -52,7 +52,7 @@
*/
#undef START_IN_KERNEL_MODE
-#define DRV_VER "0.5.21"
+#define DRV_VER "0.5.22"
/*
* According to the Atom N270 datasheet,
@@ -165,12 +165,9 @@ static const struct bios_settings_t bios_tbl[] = {
/* Gateway */
{"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x21, 0x00} },
{"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x20, 0x00} },
- {"Gateway ", "LT31 ", "v1.3103 ", 0x55, 0x58,
- {0x10, 0x0f, 0x00} },
- {"Gateway ", "LT31 ", "v1.3201 ", 0x55, 0x58,
- {0x10, 0x0f, 0x00} },
- {"Gateway ", "LT31 ", "v1.3302 ", 0x55, 0x58,
- {0x10, 0x0f, 0x00} },
+ {"Gateway", "LT31", "v1.3103", 0x55, 0x58, {0x10, 0x0f, 0x00} },
+ {"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x10, 0x0f, 0x00} },
+ {"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x10, 0x0f, 0x00} },
/* Packard Bell */
{"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x21, 0x00} },
{"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x20, 0x00} },
@@ -495,13 +492,26 @@ static struct platform_driver acerhdf_driver = {
.remove = acerhdf_remove,
};
+/* checks if str begins with start */
+static int str_starts_with(const char *str, const char *start)
+{
+ unsigned long str_len = 0, start_len = 0;
+
+ str_len = strlen(str);
+ start_len = strlen(start);
+
+ if (str_len >= start_len &&
+ !strncmp(str, start, start_len))
+ return 1;
+
+ return 0;
+}
/* check hardware */
static int acerhdf_check_hardware(void)
{
char const *vendor, *version, *product;
- int i;
- unsigned long prod_len = 0;
+ const struct bios_settings_t *bt = NULL;
/* get BIOS data */
vendor = dmi_get_system_info(DMI_SYS_VENDOR);
@@ -523,20 +533,20 @@ static int acerhdf_check_hardware(void)
kernelmode = 0;
}
- prod_len = strlen(product);
-
if (verbose)
pr_info("BIOS info: %s %s, product: %s\n",
vendor, version, product);
/* search BIOS version and vendor in BIOS settings table */
- for (i = 0; bios_tbl[i].version[0]; i++) {
- if (strlen(bios_tbl[i].product) >= prod_len &&
- !strncmp(bios_tbl[i].product, product,
- strlen(bios_tbl[i].product)) &&
- !strcmp(bios_tbl[i].vendor, vendor) &&
- !strcmp(bios_tbl[i].version, version)) {
- bios_cfg = &bios_tbl[i];
+ for (bt = bios_tbl; bt->vendor[0]; bt++) {
+ /*
+ * check if actual hardware BIOS vendor, product and version
+ * IDs start with the strings of BIOS table entry
+ */
+ if (str_starts_with(vendor, bt->vendor) &&
+ str_starts_with(product, bt->product) &&
+ str_starts_with(version, bt->version)) {
+ bios_cfg = bt;
break;
}
}