diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2016-10-28 03:04:05 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-11-10 18:38:47 +0300 |
| commit | 9d3f5b85ef8b1ace2499d15f799609d5f7819a14 (patch) | |
| tree | 39c96a47ec86a2d9e1d2152a508e29eb34a5c47a /sound | |
| parent | 33bcff297228350cb908e165c8d3031a6c52dde8 (diff) | |
| download | linux-9d3f5b85ef8b1ace2499d15f799609d5f7819a14.tar.xz | |
device-dax: fix percpu_ref_exit ordering
commit 52e73eb2872c9af6f382b2b22954ca8214397a4e upstream.
We need to wait until the percpu_ref is released before exit. Otherwise,
we sometimes lose the race and trigger this new warning that was added
in v4.9 (commit a67823c1ed10 "percpu-refcount: init ->confirm_switch
member properly"):
WARNING: CPU: 0 PID: 3629 at lib/percpu-refcount.c:107 percpu_ref_exit+0x51/0x60
[..]
Call Trace:
[<ffffffff814bf093>] dump_stack+0x85/0xc2
[<ffffffff810b15db>] __warn+0xcb/0xf0
[<ffffffff810b170d>] warn_slowpath_null+0x1d/0x20
[<ffffffff814d70c1>] percpu_ref_exit+0x51/0x60
[<ffffffffa005706a>] dax_pmem_percpu_exit+0x1a/0x50 [dax_pmem]
[<ffffffff81615f1f>] devm_action_release+0xf/0x20
Fixes: ab68f2622136 ("/dev/dax, pmem: direct access to persistent memory")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound')
0 files changed, 0 insertions, 0 deletions