[Xen-changelog] [xen master] rombios/keyboard: Don't needlessly poll the status register

[patchbot@xxxxxxx]

commit 20025504271220ab3bf041955a3cd40c6057e58e
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Tue Aug 6 14:48:36 2013 +0100
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Thu Aug 8 12:03:09 2013 +0100

    rombios/keyboard: Don't needlessly poll the status register
    
    Repeated polling of the status register is not going to change its value, so
    don't needlessly take 8192 traps to Qemu when 1 will do.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Keir Fraser <keir@xxxxxxx>
---
 tools/firmware/rombios/rombios.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/firmware/rombios/rombios.c b/tools/firmware/rombios/rombios.c
index 80980b6..e364759 100644
--- a/tools/firmware/rombios/rombios.c
+++ b/tools/firmware/rombios/rombios.c
@@ -1805,12 +1805,12 @@ keyboard_init()
     while ( (inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x00);
 
     /* flush incoming keys */
-    max=0x2000;
+    max=2;
     while (--max > 0) {
         outb(0x80, 0x00);
         if (inb(0x64) & 0x01) {
             inb(0x60);
-            max = 0x2000;
+            max = 2;
             }
         }
 
--
generated by git-patchbot for /home/xen/git/xen.git#master

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