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@redhat.com>

diff --git a/xen/drivers/char/console.c b/xen/drivers/char/console.c
index a12a6caf7192a923435c6fc5e135a38a1ecf9f42..dd615b6732a4ab40a8221bba5f18dcdca60ae524 100644 (file)
--- a/xen/drivers/char/console.c
+++ b/xen/drivers/char/console.c
@@ -332,13 +332,6 @@ static long guest_console_write(XEN_GUEST_HANDLE(char) buffer, int count)
 
     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",