diff options
| author | Ram Vepa <ram.vepa@qlogic.com> | 2011-05-27 17:41:55 +0400 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2011-07-18 23:09:23 +0400 |
| commit | 4356d0b64b9be53c507f66c572c1e275b4529239 (patch) | |
| tree | 58c15fe0987ae06873f2fe8a1b188db73fbaf796 /include | |
| parent | 2df4f7579d212e8e0df7c8a24f57bf90f23fd516 (diff) | |
| download | linux-4356d0b64b9be53c507f66c572c1e275b4529239.tar.xz | |
IB/qib: Fix potential deadlock with link down interrupt
There is a possibility of a deadlock due to the way locks are
acquired and released in qib_set_uevent_bits(). The function
qib_set_uevent_bits() is called in process context and it uses
spin_lock() and spin_unlock(). This same lock is acquired/released
in interrupt context which can lead to a deadlock when running on
the same cpu.
The fix is to replace spin_lock() and spin_unlock() with
spin_lock_irqsave() and spin_unlock_irqrestore() respectively in
qib_set_uevent_bits().
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions