[natsemi] Fix test for addresses below 4GB

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

diff --git a/src/drivers/net/natsemi.h b/src/drivers/net/natsemi.h
index e3444712b6143d0d57de9cc2912c7b8b460afc62..7e8d6f8002d62bc941a4b3ab4176b88d5eb13292 100644 (file)
--- a/src/drivers/net/natsemi.h
+++ b/src/drivers/net/natsemi.h
@@ -319,8 +319,8 @@ natsemi_address_ok ( struct natsemi_nic *natsemi, physaddr_t address ) {
        if ( natsemi->flags & NATSEMI_64BIT )
                return 1;
 
-       /* A 32-bit card can access all address below 4GB */
-       if ( ( address & 0xffffffffUL ) == 0 )
+       /* A 32-bit card can access all addresses below 4GB */
+       if ( ( address & ~0xffffffffULL ) == 0 )
                return 1;
 
        return 0;