acpi: fix acpi_os_read_pci_configuration() misuse of raw_pci_read()

The raw_pci_read() interface (as the raw_pci_ops->read() before it)
unconditionally fills in a 32-bit integer return value regardless of the
size of the operation requested.

So claiming to take a "void *" is wrong, as is passing in a pointer to
just a byte variable.

Noticed by pageexec when enabling -fstack-protector (which needs other
patches too to actually work, but that's a separate issue).

Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h
index 022a5fd80c8e..4839f2af94c3 100644
--- a/include/acpi/acpiosxf.h
+++ b/include/acpi/acpiosxf.h
@@ -222,7 +222,7 @@ acpi_os_write_memory(acpi_physical_address address, u32 value, u32 width);
  */
 acpi_status
 acpi_os_read_pci_configuration(struct acpi_pci_id *pci_id,
-                               u32 reg, void *value, u32 width);
+                               u32 reg, u32 *value, u32 width);
 
 acpi_status
 acpi_os_write_pci_configuration(struct acpi_pci_id *pci_id,