shithub: choc

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Fix outb() call, display error message if unable to gain port
permissions.

Subversion-branch: /branches/opl-branch
Subversion-revision: 1460

--- a/opl/opl_linux.c

+++ b/opl/opl_linux.c

@@ -27,6 +27,9 @@

 #ifdef HAVE_IOPERM

+#include <stdio.h>

+#include <string.h>

+#include <errno.h>

 #include <unistd.h>

 #include <sys/io.h>

@@ -35,12 +38,14 @@

 static unsigned int opl_port_base;

-static void OPL_Linux_Init(unsigned int port_base)

+static int OPL_Linux_Init(unsigned int port_base)

 {

     // Try to get permissions:

     if (ioperm(port_base, 2, 1) < 0)

     {

+        fprintf(stderr, "Failed to get I/O port permissions for 0x%x: %s\n",

+                        port_base, strerror(errno));

         return 0;

     }

@@ -63,7 +68,7 @@

 static void OPL_Linux_PortWrite(opl_port_t port, unsigned int value)

 {

-    outb(opl_port_base + port, value);

+    outb(value, opl_port_base + port);

 }

 opl_driver_t opl_linux_driver =