diff options
| author | Bryan O'Sullivan <bos@pathscale.com> | 2006-05-23 11:32:29 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-05-23 13:27:06 -0700 |
| commit | ebac3800e5652063aa9491ef7fb4d57e089eb385 (patch) | |
| tree | c925e75212ff309bdfaf6dfef7cbe9defb00c7fc /drivers/infiniband/hw | |
| parent | 1faadface9c5d000bb16e42c89f24859337cf2db (diff) | |
| download | blackbird-op-linux-ebac3800e5652063aa9491ef7fb4d57e089eb385.tar.gz blackbird-op-linux-ebac3800e5652063aa9491ef7fb4d57e089eb385.zip | |
IB/ipath: fix spinlock recursion bug
The local loopback path for RC can lock the rkey table lock without
blocking interrupts. The receive interrupt path can then call
ipath_rkey_ok() and deadlock. Remove the redundant lock.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_keys.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_keys.c b/drivers/infiniband/hw/ipath/ipath_keys.c index aa33b0e9f2f6..5ae8761f9dd2 100644 --- a/drivers/infiniband/hw/ipath/ipath_keys.c +++ b/drivers/infiniband/hw/ipath/ipath_keys.c @@ -136,9 +136,7 @@ int ipath_lkey_ok(struct ipath_lkey_table *rkt, struct ipath_sge *isge, ret = 1; goto bail; } - spin_lock(&rkt->lock); mr = rkt->table[(sge->lkey >> (32 - ib_ipath_lkey_table_size))]; - spin_unlock(&rkt->lock); if (unlikely(mr == NULL || mr->lkey != sge->lkey)) { ret = 0; goto bail; @@ -184,8 +182,6 @@ bail: * @acc: access flags * * Return 1 if successful, otherwise 0. - * - * The QP r_rq.lock should be held. */ int ipath_rkey_ok(struct ipath_ibdev *dev, struct ipath_sge_state *ss, u32 len, u64 vaddr, u32 rkey, int acc) @@ -196,9 +192,7 @@ int ipath_rkey_ok(struct ipath_ibdev *dev, struct ipath_sge_state *ss, size_t off; int ret; - spin_lock(&rkt->lock); mr = rkt->table[(rkey >> (32 - ib_ipath_lkey_table_size))]; - spin_unlock(&rkt->lock); if (unlikely(mr == NULL || mr->lkey != rkey)) { ret = 0; goto bail; |
