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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2012-07-11 14:02:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-11 16:04:47 -0700 |
| commit | 8875408abd935a77b6e1cb11c21c438aa2e7ec75 (patch) | |
| tree | 25b8dc9d54b703651bc2ebabb2d6dea09f433eb0 /drivers/misc/sgi-xp | |
| parent | fea9f718b3d68147f162ed2d870183ce5e0ad8d8 (diff) | |
| download | linux-8875408abd935a77b6e1cb11c21c438aa2e7ec75.tar.gz linux-8875408abd935a77b6e1cb11c21c438aa2e7ec75.tar.bz2 linux-8875408abd935a77b6e1cb11c21c438aa2e7ec75.zip | |
sgi-xp: nested calls to spin_lock_irqsave()
The code here has a nested spin_lock_irqsave(). It's not needed since
IRQs are already disabled and it causes a problem because it means that
IRQs won't be enabled again at the end. The second call to
spin_lock_irqsave() will overwrite the value of irq_flags and we can't
restore the proper settings.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-xp')
| -rw-r--r-- | drivers/misc/sgi-xp/xpc_uv.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/misc/sgi-xp/xpc_uv.c b/drivers/misc/sgi-xp/xpc_uv.c index 17bbacb1b4b1..87b251ab6ec5 100644 --- a/drivers/misc/sgi-xp/xpc_uv.c +++ b/drivers/misc/sgi-xp/xpc_uv.c @@ -452,9 +452,9 @@ xpc_handle_activate_mq_msg_uv(struct xpc_partition *part, if (msg->activate_gru_mq_desc_gpa != part_uv->activate_gru_mq_desc_gpa) { - spin_lock_irqsave(&part_uv->flags_lock, irq_flags); + spin_lock(&part_uv->flags_lock); part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; - spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); + spin_unlock(&part_uv->flags_lock); part_uv->activate_gru_mq_desc_gpa = msg->activate_gru_mq_desc_gpa; } |