SMB VFS suspend FAIL!

smb-vfs-suspend-fail.dmesg

[111619.545110] PM: Syncing filesystems ... done.
[111619.551863] PM: Preparing system for mem sleep
[111619.551884] Freezing user space processes ... 
[111639.560284] Freezing of tasks failed after 20.00 seconds (1 tasks refusing to freeze, wq_busy=0):
[111639.560456] mc              D ffff88013fc13b00     0 13456  13408 0x00000004
[111639.560460]  ffff880004475be8 0000000000000086 ffff880005614560 ffff880004475fd8
[111639.560463]  ffff880004475fd8 ffff880004475fd8 ffff880135db5c80 ffff880005614560
[111639.560466]  ffff880004475bc8 ffff880005614560 ffff88013fc14398 0000000000000082
[111639.560469] Call Trace:
[111639.560477]  [<ffffffff81127260>] ? sleep_on_page+0x20/0x20
[111639.560482]  [<ffffffff81690a29>] schedule+0x29/0x70
[111639.560485]  [<ffffffff81690aff>] io_schedule+0x8f/0xd0
[111639.560487]  [<ffffffff8112726e>] sleep_on_page_killable+0xe/0x40
[111639.560490]  [<ffffffff8168ef7b>] __wait_on_bit_lock+0x5b/0xc0
[111639.560492]  [<ffffffff811271c7>] __lock_page_killable+0x67/0x70
[111639.560496]  [<ffffffff81078e90>] ? autoremove_wake_function+0x40/0x40
[111639.560499]  [<ffffffff81129625>] generic_file_aio_read+0x475/0x710
[111639.560503]  [<ffffffff8119c644>] ? core_sys_select+0x214/0x310
[111639.560507]  [<ffffffff8129fc25>] fuse_file_aio_read+0x75/0x90
[111639.560509]  [<ffffffff811889c6>] do_sync_read+0xe6/0x120
[111639.560513]  [<ffffffff812bee52>] ? security_file_permission+0x92/0xb0
[111639.560515]  [<ffffffff81188e81>] ? rw_verify_area+0x61/0xf0
[111639.560517]  [<ffffffff81189319>] vfs_read+0xa9/0x180
[111639.560520]  [<ffffffff8118943a>] sys_read+0x4a/0x90
[111639.560523]  [<ffffffff816990a9>] system_call_fastpath+0x16/0x1b