[libc] Use only generic errortab entries to match generic errors

diff --git a/src/hci/strerror.c b/src/hci/strerror.c
index 216b1e5..94547dd 100644 (file)
--- a/src/hci/strerror.c
+++ b/src/hci/strerror.c
@@ -24,14 +24,13 @@ FILE_LICENCE ( GPL2_OR_LATER );
  * Find error description
  *
  * @v errno            Error number
- * @v mask             Mask of bits that we care about
  * @ret errortab       Error description, or NULL
  */
-static struct errortab * find_error ( int errno, int mask ) {
+static struct errortab * find_error ( int errno ) {
        struct errortab *errortab;
 
        for_each_table_entry ( errortab, ERRORTAB ) {
-               if ( ( ( errortab->errno ^ errno ) & mask ) == 0 )
+               if ( errortab->errno == errno )
                        return errortab;
        }
 
@@ -50,13 +49,13 @@ static struct errortab * find_closest_error ( int errno ) {
        struct errortab *errortab;
 
        /* First, look for an exact match */
-       if ( ( errortab = find_error ( errno, 0x7fffffff ) ) != NULL )
+       if ( ( errortab = find_error ( errno ) ) != NULL )
                return errortab;
 
        /* Second, try masking off the gPXE-specific bit and seeing if
         * we have an entry for the generic POSIX error message.
         */
-       if ( ( errortab = find_error ( errno, 0x4f0000ff ) ) != NULL )
+       if ( ( errortab = find_error ( errno & 0x7f0000ff ) ) != NULL )
                return errortab;
 
        return NULL;