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| author | Jan Beulich <jbeulich@novell.com> | 2009-05-06 13:02:19 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-05-07 21:42:39 -0700 |
| commit | 61438766514a2d7f191ce1b3cf6812eabbef4ef7 (patch) | |
| tree | 4ce81e8bbdc731812e54ed4def92eac4f266cbd6 | |
| parent | e0e5ea3268db428d19e1c5fa00e6f583861cbdbd (diff) | |
| download | op-kernel-dev-61438766514a2d7f191ce1b3cf6812eabbef4ef7.zip op-kernel-dev-61438766514a2d7f191ce1b3cf6812eabbef4ef7.tar.gz | |
x86: fix boot hang in early_reserve_e820()
If the first non-reserved (sub-)range doesn't fit the size requested,
an endless loop will be entered. If a range returned from
find_e820_area_size() turns out insufficient in size, the range must
be skipped before calling the function again.
[ Impact: fixes boot hang on some platforms ]
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| -rw-r--r-- | arch/x86/kernel/e820.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index ef2c356..0062813 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -1074,12 +1074,13 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align) u64 addr; u64 start; - start = startt; - while (size < sizet && (start + 1)) + for (start = startt; ; start += size) { start = find_e820_area_size(start, &size, align); - - if (size < sizet) - return 0; + if (!(start + 1)) + return 0; + if (size >= sizet) + break; + } #ifdef CONFIG_X86_32 if (start >= MAXMEM) |
