Changeset 38832 in vbox for trunk/src/VBox/Devices/PC/BIOS-new

Timestamp:

Sep 22, 2011 5:51:53 PM (13 years ago)

Author:

vboxsync

Message:

Do not just loop forever.

File:

• trunk/src/VBox/Devices/PC/BIOS-new/ps2mouse.c (modified) (2 diffs)

trunk/src/VBox/Devices/PC/BIOS-new/ps2mouse.c

@@ -63 +63 @@
 uint8_t send_to_mouse_ctrl(uint8_t sendbyte)
 {
+    BX_DEBUG_INT15_MS("send %02x to mouse:\n", sendbyte);
     // wait for chance to write to ctrl
-    if ( inb(0x64) & 0x02 )
+    if (inb(0x64) & 0x02)
         BX_PANIC(panic_msg_keyb_buffer_full,"sendmouse");
     outb(0x64, 0xD4);
@@ -74 +75 @@
 uint8_t get_mouse_data(uint8_t __far *data)
 {
+    int         retries = 10000;
     uint8_t     response;
 
-    //@todo: timeout?
-    while ((inb(0x64) & 0x21) != 0x21)
-        ;
-    
+    while ((inb(0x64) & 0x21) != 0x21 && retries)
+        --retries;
+    
+    if (!retries)
+        return(1);
+
     response = inb(0x60);
     *data = response;