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| author | Borislav Petkov <borislav.petkov@amd.com> | 2010-12-02 17:48:35 +0100 |
|---|---|---|
| committer | Borislav Petkov <borislav.petkov@amd.com> | 2010-12-08 19:52:27 +0100 |
| commit | bb31b3122c0dd07d2d958da17a50ad771ce79e2b (patch) | |
| tree | c76193ec64772ee387be80245e86d093ab16c908 | |
| parent | cf7d7e5a1980d1116ee152d25dac382b112b9c17 (diff) | |
| download | linux-bb31b3122c0dd07d2d958da17a50ad771ce79e2b.tar.gz linux-bb31b3122c0dd07d2d958da17a50ad771ce79e2b.tar.bz2 linux-bb31b3122c0dd07d2d958da17a50ad771ce79e2b.zip | |
EDAC: Fix workqueue-related crashes
00740c58541b6087d78418cebca1fcb86dc6077d changed edac_core to
un-/register a workqueue item only if a lowlevel driver supplies a
polling routine. Normally, when we remove a polling low-level driver, we
go and cancel all the queued work. However, the workqueue unreg happens
based on the ->op_state setting, and edac_mc_del_mc() sets this to
OP_OFFLINE _before_ we cancel the work item, leading to NULL ptr oops on
the workqueue list.
Fix it by putting the unreg stuff in proper order.
Cc: <stable@kernel.org> #36.x
Reported-and-tested-by: Tobias Karnat <tobias.karnat@googlemail.com>
LKML-Reference: <1291201307.3029.21.camel@Tobias-Karnat>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
| -rw-r--r-- | drivers/edac/edac_mc.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c index ba6586a69ccc..795ea69c4d8f 100644 --- a/drivers/edac/edac_mc.c +++ b/drivers/edac/edac_mc.c @@ -586,14 +586,16 @@ struct mem_ctl_info *edac_mc_del_mc(struct device *dev) return NULL; } - /* marking MCI offline */ - mci->op_state = OP_OFFLINE; - del_mc_from_global_list(mci); mutex_unlock(&mem_ctls_mutex); - /* flush workq processes and remove sysfs */ + /* flush workq processes */ edac_mc_workq_teardown(mci); + + /* marking MCI offline */ + mci->op_state = OP_OFFLINE; + + /* remove from sysfs */ edac_remove_sysfs_mci_device(mci); edac_printk(KERN_INFO, EDAC_MC, |