[Xen-changelog] [xen-unstable] Remove "buffer half full" check from guest_console_write

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1253089564 -3600
# Node ID a35a1ac91230c74067736b82123b65c370a8d910
# Parent  6f719ff43b42f178a0853174e0732a8c420e7be3
Remove "buffer half full" check from guest_console_write

Checks are made at a lower level in the serial code, and teh policy
there is to drop rather than wait. So boot makes progress even when
serial hardware is problematic.

Signed-off-by: Chris Lalancette <clalance@xxxxxxxxxx>
---
 xen/drivers/char/console.c |    7 -------
 1 files changed, 7 deletions(-)

diff -r 6f719ff43b42 -r a35a1ac91230 xen/drivers/char/console.c
--- a/xen/drivers/char/console.c        Wed Sep 16 09:22:38 2009 +0100
+++ b/xen/drivers/char/console.c        Wed Sep 16 09:26:04 2009 +0100
@@ -332,13 +332,6 @@ static long guest_console_write(XEN_GUES
 
     while ( count > 0 )
     {
-        while ( serial_tx_space(sercon_handle) < (serial_txbufsz / 2) )
-        {
-            if ( hypercall_preempt_check() )
-                break;
-            cpu_relax();
-        }
-
         if ( hypercall_preempt_check() )
             return hypercall_create_continuation(
                 __HYPERVISOR_console_io, "iih",

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