releases/3.16.7/drivers-hv-vmbus-cleanup-vmbus_establish_gpadl.patch

   1 From 72c6b71c245dac8f371167d97ef471b367d0b66b Mon Sep 17 00:00:00 2001
   2 From: "K. Y. Srinivasan" <kys@microsoft.com>
   3 Date: Wed, 27 Aug 2014 16:25:34 -0700
   4 Subject: Drivers: hv: vmbus: Cleanup vmbus_establish_gpadl()
   5
   6 From: "K. Y. Srinivasan" <kys@microsoft.com>
   7
   8 commit 72c6b71c245dac8f371167d97ef471b367d0b66b upstream.
   9
  10 Eliminate the call to BUG_ON() by waiting for the host to respond. We are
  11 trying to reclaim the ownership of memory that was given to the host and so
  12 we will have to wait until the host responds.
  13
  14 Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
  15 Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
  16 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  17
  18 ---
  19  drivers/hv/channel.c |    5 +----
  20  1 file changed, 1 insertion(+), 4 deletions(-)
  21
  22 --- a/drivers/hv/channel.c
  23 +++ b/drivers/hv/channel.c
  24 @@ -363,7 +363,6 @@ int vmbus_establish_gpadl(struct vmbus_c
  25         u32 next_gpadl_handle;
  26         unsigned long flags;
  27         int ret = 0;
  28 -       int t;
  29
  30         next_gpadl_handle = atomic_read(&vmbus_connection.next_gpadl_handle);
  31         atomic_inc(&vmbus_connection.next_gpadl_handle);
  32 @@ -410,9 +409,7 @@ int vmbus_establish_gpadl(struct vmbus_c
  33
  34                 }
  35         }
  36 -       t = wait_for_completion_timeout(&msginfo->waitevent, 5*HZ);
  37 -       BUG_ON(t == 0);
  38 -
  39 +       wait_for_completion(&msginfo->waitevent);
  40
  41         /* At this point, we received the gpadl created msg */
  42         *gpadl_handle = gpadlmsg->gpadl;