diff options
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/dmi_scan.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index 93f7acdaac7a..82ee042f075c 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -650,6 +650,21 @@ void __init dmi_scan_machine(void) goto error; /* + * Same logic as above, look for a 64-bit entry point + * first, and if not found, fall back to 32-bit entry point. + */ + memcpy_fromio(buf, p, 16); + for (q = p + 16; q < p + 0x10000; q += 16) { + memcpy_fromio(buf + 16, q, 16); + if (!dmi_smbios3_present(buf)) { + dmi_available = 1; + dmi_early_unmap(p, 0x10000); + goto out; + } + memcpy(buf, buf + 16, 16); + } + + /* * Iterate over all possible DMI header addresses q. * Maintain the 32 bytes around q in buf. On the * first iteration, substitute zero for the @@ -659,7 +674,7 @@ void __init dmi_scan_machine(void) memset(buf, 0, 16); for (q = p; q < p + 0x10000; q += 16) { memcpy_fromio(buf + 16, q, 16); - if (!dmi_smbios3_present(buf) || !dmi_present(buf)) { + if (!dmi_present(buf)) { dmi_available = 1; dmi_early_unmap(p, 0x10000); goto out; |