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authorZhenzhong Duan <zhenzhong.duan@oracle.com>2012-12-20 15:05:14 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-20 17:40:19 -0800
commit9f9c9cbb60576a1518d0bf93fb8e499cffccf377 (patch)
tree217db9db9baf699c4392dedbc4a9ae4fce6f442a /include
parentf1d8e614d74b09531b9a85e812485340f3df7b1c (diff)
drivers/firmware/dmi_scan.c: fetch dmi version from SMBIOS if it exists
The right dmi version is in SMBIOS if it's zero in DMI region This issue was originally found from an oracle bug. One customer noticed system UUID doesn't match between dmidecode & uek2. - HP ProLiant BL460c G6 : # cat /sys/devices/virtual/dmi/id/product_uuid 00000000-0000-4C48-3031-4D5030333531 # dmidecode | grep -i uuid UUID: 00000000-0000-484C-3031-4D5030333531 From SMBIOS 2.6 on, spec use little-endian encoding for UUID other than network byte order. So we need to get dmi version to distinguish. If version is 0.0, the real version is taken from the SMBIOS version. This is part of original kernel comment in code. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Cc: Feng Jin <joe.jin@oracle.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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