LU-1039 ptlrpc: handle bulk IO errors correctly.

LU-1039 ptlrpc: handle bulk IO errors correctly.

don't panic on incorrect bulk transfer,
correctly handle a bulk request reorder.

LustreError: 12927:0:(client.c:1696:ptlrpc_check_set()) LBUG
Pid: 12927, comm: ptlrpcd-brw

Call Trace:
[<ffffffffa083c865>] libcfs_debug_dumpstack+0x55/0x80 [libcfs]
[<ffffffffa083cea5>] lbug_with_loc+0x75/0xe0 [libcfs]
[<ffffffffa0e2edd6>] ptlrpc_check_set+0x1a66/0x1b90 [ptlrpc]
[<ffffffffa0e61006>] ? ptlrpcd_check+0x46/0x290 [ptlrpc]
[<ffffffffa0e61006>] ? ptlrpcd_check+0x46/0x290 [ptlrpc]
[<ffffffffa0e611b8>] ptlrpcd_check+0x1f8/0x290 [ptlrpc]
[<ffffffffa0e6157b>] ptlrpcd+0x32b/0x3b0 [ptlrpc]
[<ffffffff81056388>] ? finish_task_switch+0x48/0x110
[<ffffffff8105f500>] ? default_wake_function+0x0/0x20
[<ffffffffa0e61250>] ? ptlrpcd+0x0/0x3b0 [ptlrpc]
[<ffffffff8100c2ca>] child_rip+0xa/0x20
[<ffffffff81500b70>] ? _spin_unlock_irq+0x30/0x40
[<ffffffff8100bc10>] ? restore_args+0x0/0x30
[<ffffffffa0e61250>] ? ptlrpcd+0x0/0x3b0 [ptlrpc]
[<ffffffff8100c2c0>] ? child_rip+0x0/0x20

Xyratex-bug-id: MRP-303
Change-Id: Ibb19c33e92dbecf5d029c7e6c567f65fb764f444
Signed-off-by: Alexey Lyashkov <alexey_lyashkov@xyratex.com>
Signed-off-by: Oleg Drokin <green@whamcloud.com>
Reviewed-on: http://review.whamcloud.com/2023
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>