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  1. 16 9月, 2011 1 次提交
    • R
      target: Fix race between multiple invocations of target_qf_do_work() · bcac364a
      由 Roland Dreier 提交于 
      When work is scheduled with schedule_work(), the work can end up
running on multiple CPUs at the same time -- this happens if
the work is already running on one CPU and schedule_work() is called
on another CPU.  This leads to list corruption with target_qf_do_work(),
which is roughly doing:

	spin_lock(...);
	list_for_each_entry_safe(...) {
		list_del(...);
		spin_unlock(...);

		// do stuff

		spin_lock(...);
	}

With multiple CPUs running this code, one CPU can end up deleting the
list entry that the other CPU is about to work on.

Fix this by splicing the list entries onto a local list and then
operating on that in the work function.  This way, each invocation of
target_qf_do_work() operates on its own local list and so multiple
invocations don't corrupt each other's list.  This also avoids dropping
and reacquiring the lock for each list entry.
Signed-off-by: NRoland Dreier <roland@purestorage.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      bcac364a
  3. 15 9月, 2011 7 次提交
  5. 14 9月, 2011 2 次提交
  7. 13 9月, 2011 1 次提交
    • G
      hwmon: (pmbus) Fix low limit temperature alarms · 40257b95
      由 Guenter Roeck 提交于 
      Temperature alarms are detected by checking the alarm bit and comparing
temperature limits against the current temperature. For low limits, this
comparison needs to be reversed (temp < limit instead of temp > limit).
This was not taken into account, resulting in wrong alarms if a temperature
fell below a low limit.

Fix by adding a low limit flag in the limit data structure. When creating the
sensor entry, the order of registers to compare is now reversed for low limits.
Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>
Acked-by: NJean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org # 3.0+
      40257b95
  9. 11 9月, 2011 9 次提交
  11. 10 9月, 2011 5 次提交
  13. 09 9月, 2011 6 次提交
  15. 07 9月, 2011 6 次提交
  17. 06 9月, 2011 3 次提交