x86 setup: fix ghost entries under /sys/firmware/edd take 3

Browse source

Some BIOSes do not indicate error when trying to read from non-
existing device. Zero buffer before reading and check that we
possibly have valid MBR by looking for MBR magic.

This was fixed in different way for edd.S in
http://marc.info/?l=linux-kernel&m=114087765422490&w=2, but lost
again when edd.S was rewritten in C.

Signed-off-by: Andrey Borzenkov < arvidjaar@mail.ru>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

...

This commit is contained in:

Andrey Borzenkov 2008-10-03 21:08:49 +04:00 • committed by H. Peter Anvin

parent 464f04c9e9

commit 6cdcdb99cf

1 changed files with 6 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

7

arch/x86/boot/edd.c

View file