releases/3.0.1/powerpc-pseries-hvconsole-fix-dropped-console-output.patch

   1 From 51d33021425e1f905beb4208823146f2fb6517da Mon Sep 17 00:00:00 2001
   2 From: Anton Blanchard <anton@samba.org>
   3 Date: Tue, 5 Jul 2011 21:51:36 +0000
   4 Subject: powerpc/pseries/hvconsole: Fix dropped console output
   5
   6 From: Anton Blanchard <anton@samba.org>
   7
   8 commit 51d33021425e1f905beb4208823146f2fb6517da upstream.
   9
  10 Return -EAGAIN when we get H_BUSY back from the hypervisor. This
  11 makes the hvc console driver retry, avoiding dropped printks.
  12
  13 Signed-off-by: Anton Blanchard <anton@samba.org>
  14 Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
  15 Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  16
  17 ---
  18  arch/powerpc/platforms/pseries/hvconsole.c |    2 +-
  19  1 file changed, 1 insertion(+), 1 deletion(-)
  20
  21 --- a/arch/powerpc/platforms/pseries/hvconsole.c
  22 +++ b/arch/powerpc/platforms/pseries/hvconsole.c
  23 @@ -73,7 +73,7 @@ int hvc_put_chars(uint32_t vtermno, cons
  24         if (ret == H_SUCCESS)
  25                 return count;
  26         if (ret == H_BUSY)
  27 -               return 0;
  28 +               return -EAGAIN;
  29         return -EIO;
  30  }
  31