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| author | Yinghai Lu <yinghai@kernel.org> | 2009-06-17 00:31:16 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-17 04:47:28 +0200 |
| commit | 3b0fde0fac19c180317eb0601b3504083f4b9bf5 (patch) | |
| tree | 5458ec10f3c6759ec64c6fa27e12e692a575d07a /block | |
| parent | spi: takes size of a pointer to determine the size of the pointed-to type (diff) | |
| download | linux-3b0fde0fac19c180317eb0601b3504083f4b9bf5.tar.xz linux-3b0fde0fac19c180317eb0601b3504083f4b9bf5.zip | |
firmware_map: fix hang with x86/32bit
Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13484
Peer reported:
| The bug is introduced from kernel 2.6.27, if E820 table reserve the memory
| above 4G in 32bit OS(BIOS-e820: 00000000fff80000 - 0000000120000000
| (reserved)), system will report Int 6 error and hang up. The bug is caused by
| the following code in drivers/firmware/memmap.c, the resource_size_t is 32bit
| variable in 32bit OS, the BUG_ON() will be invoked to result in the Int 6
| error. I try the latest 32bit Ubuntu and Fedora distributions, all hit this
| bug.
|======
|static int firmware_map_add_entry(resource_size_t start, resource_size_t end,
| const char *type,
| struct firmware_map_entry *entry)
and it only happen with CONFIG_PHYS_ADDR_T_64BIT is not set.
it turns out we need to pass u64 instead of resource_size_t for that.
[akpm@linux-foundation.org: add comment]
Reported-and-tested-by: Peer Chen <pchen@nvidia.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions