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authorPeter Chubb <peterc@gelato.unsw.edu.au>2005-10-19 22:45:14 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-19 23:04:31 -0700
commit51b190b304bbeb1090ba20b0623d39917fa62997 (patch)
treeff136b65291671ca93f65aff101c1b5ead5f9a9b
parent11909d64389c24b409e20f0eeafdc262e0a55788 (diff)
downloadlinux-stericsson-51b190b304bbeb1090ba20b0623d39917fa62997.tar.gz
[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.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index e36c5da2b31a..3937adf4e5e5 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