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| author | Peter Chubb <peterc@gelato.unsw.edu.au> | 2005-10-19 22:45:14 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-19 23:04:31 -0700 |
| commit | 51b190b304bbeb1090ba20b0623d39917fa62997 (patch) | |
| tree | ff136b65291671ca93f65aff101c1b5ead5f9a9b | |
| parent | 11909d64389c24b409e20f0eeafdc262e0a55788 (diff) | |
| download | linux-3.10-51b190b304bbeb1090ba20b0623d39917fa62997.tar.gz linux-3.10-51b190b304bbeb1090ba20b0623d39917fa62997.tar.bz2 linux-3.10-51b190b304bbeb1090ba20b0623d39917fa62997.zip | |
[PATCH] `unaligned access' in acpi get_root_bridge_busnr()
In drivers/acpi/glue.c the address of an integer is cast to the address of
an unsigned long. This breaks on systems where a long is larger than an
int --- for a start the int can be misaligned; for a second the assignment
through the pointer will overwrite part of the next variable.
Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au>
Acked-by: "Brown, Len" <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/acpi/glue.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c index e36c5da2b31..3937adf4e5e 100644 --- a/drivers/acpi/glue.c +++ b/drivers/acpi/glue.c @@ -96,7 +96,7 @@ struct acpi_find_pci_root { static acpi_status do_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) { - int *busnr = (int *)data; + unsigned long *busnr = (unsigned long *)data; struct acpi_resource_address64 address; if (resource->id != ACPI_RSTYPE_ADDRESS16 && @@ -115,13 +115,13 @@ do_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) static int get_root_bridge_busnr(acpi_handle handle) { acpi_status status; - int bus, bbn; + unsigned long bus, bbn; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); status = acpi_evaluate_integer(handle, METHOD_NAME__BBN, NULL, - (unsigned long *)&bbn); + &bbn); if (status == AE_NOT_FOUND) { /* Assume bus = 0 */ printk(KERN_INFO PREFIX @@ -153,7 +153,7 @@ static int get_root_bridge_busnr(acpi_handle handle) } exit: acpi_os_free(buffer.pointer); - return bbn; + return (int)bbn; } static acpi_status |