[acpi] Eliminate redundant acpi_find_rsdt() in acpi_sx()

The result from acpi_find_rsdt() is used only for the debug message.
Simplify the debug message and remove the otherwise redundant call to
acpi_find_rsdt().

Signed-off-by: Michael Brown <mcb30@ipxe.org>

diff --git a/src/core/acpi.c b/src/core/acpi.c
index 19b708271e01817dafd52c8bc8aae4843a722b6f..75511736db1aece8d0ec8301cb802b6eb0b7f873 100644 (file)
--- a/src/core/acpi.c
+++ b/src/core/acpi.c
@@ -259,20 +259,12 @@ static int acpi_sx_zsdt ( userptr_t zsdt, uint32_t signature ) {
  */
 int acpi_sx ( uint32_t signature ) {
        struct acpi_fadt fadtab;
-       userptr_t rsdt;
        userptr_t fadt;
        userptr_t dsdt;
        userptr_t ssdt;
        unsigned int i;
        int sx;
 
-       /* Locate RSDT */
-       rsdt = acpi_find_rsdt();
-       if ( ! rsdt ) {
-               DBG ( "RSDT not found\n" );
-               return -ENOENT;
-       }
-
        /* Try DSDT first */
        fadt = acpi_find ( FADT_SIGNATURE, 0 );
        if ( fadt ) {
@@ -291,8 +283,8 @@ int acpi_sx ( uint32_t signature ) {
                        return sx;
        }
 
-       DBGC ( colour, "RSDT %#08lx could not find \\_Sx \"%s\"\n",
-              user_to_phys ( rsdt, 0 ), acpi_name ( signature ) );
+       DBGC ( colour, "ACPI could not find \\_Sx \"%s\"\n",
+              acpi_name ( signature ) );
        return -ENOENT;
 }