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26012f0750
linux/drivers/infiniband/core
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Animesh K Trivedi 26012f0750 RDMA/iwcm: Fix hang in uninterruptible wait on cm_id destroy 
A process can get stuck in an uninterruptible wait in the
kernel while destroying a cm_id when iw_cm_connect() fails:

For example, When creation of a PD fails but the user continues with
an attempt to connect to the server without checking the return value,
in iw_cm_connect() a NULL qp is found so the call fails.  However the
IWCM_F_CONNECT_WAIT bit is not cleared.  destroy_cm_id() then waits
forever for IWCM_F_CONNECT_WAIT to be cleared.

The same problem exists on the passive side with the accept call.

Fix this by clearing the bit and waking up any waiters in the
appropriate spots.

Signed-off-by: Animesh Trivedi <atr@zurich.ibm.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-10-11 20:24:04 -07:00
..
addr.c net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
agent.c IB/mad: agent_send_response() should be void 2007-08-03 10:45:17 -07:00
agent.h RDMA: Remove subversion $Id tags 2008-07-14 23:48:44 -07:00
cache.c RDMA: Remove subversion $Id tags 2008-07-14 23:48:44 -07:00
cm_msgs.h IB: Remove __constant_{endian} uses 2009-01-17 17:11:57 -08:00
cm.c IB/cm: Check LAP state before sending an MRA 2010-07-28 15:18:24 -07:00
cma.c Merge branches 'amso1100', 'bkl', 'cma', 'cxgb3', 'cxgb4', 'ipoib', 'iser', 'masked-atomics', 'misc', 'mthca' and 'nes' into for-next 2010-05-15 20:06:01 -07:00
core_priv.h IB/core: Allow device-specific per-port sysfs files 2010-05-21 10:34:44 -07:00
device.c IB/core: Allow device-specific per-port sysfs files 2010-05-21 10:34:44 -07:00
fmr_pool.c RDMA: Remove subversion $Id tags 2008-07-14 23:48:44 -07:00
iwcm.c RDMA/iwcm: Fix hang in uninterruptible wait on cm_id destroy 2010-10-11 20:24:04 -07:00
iwcm.h RDMA: iWARP Connection Manager. 2006-09-22 15:22:46 -07:00
mad_priv.h IB/mad: Allow tuning of QP0 and QP1 sizes 2009-09-07 08:28:48 -07:00
mad_rmpp.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mad_rmpp.h RDMA: Remove subversion $Id tags 2008-07-14 23:48:44 -07:00
mad.c IB/mad: Make needlessly global mad_sendq_size/mad_recvq_size static 2010-05-23 21:39:31 -07:00
Makefile IB/uverbs: Export ib_umem_get()/ib_umem_release() to modules 2007-05-08 18:00:37 -07:00
multicast.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
packer.c RDMA: Remove subversion $Id tags 2008-07-14 23:48:44 -07:00
sa_query.c RDMA/ucma: Add option to manually set IB path 2009-11-16 09:30:33 -08:00
sa.h IB: Remove garbage non-ASCII characters from comments 2007-07-09 16:17:32 -07:00
smi.c IB/mad: Check hop count field in directed route MAD to avoid array overflow 2009-09-05 20:24:10 -07:00
smi.h IB/mad: Enable loopback of DR SMP responses from userspace 2008-01-25 14:15:25 -08:00
sysfs.c IB/core: Allow device-specific per-port sysfs files 2010-05-21 10:34:44 -07:00
ucm.c IB/ucm: Use memdup_user() 2010-05-25 21:10:57 -07:00
ucma.c IB: Explicitly rule out llseek to avoid BKL in default_llseek() 2010-04-21 12:17:38 -07:00
ud_header.c IB/core: Fix and clean up ib_ud_header_init() 2010-02-24 14:54:10 -08:00
umem.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
user_mad.c IB/umad: Make user_mad semaphore a real one 2010-09-28 20:52:21 -07:00
uverbs_cmd.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
uverbs_main.c IB: Explicitly rule out llseek to avoid BKL in default_llseek() 2010-04-21 12:17:38 -07:00
uverbs_marshall.c RDMA/cma: Export rdma cm interface to userspace 2006-12-12 11:50:22 -08:00
uverbs.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2010-03-04 08:15:33 -08:00
verbs.c IB: Rename RAW_ETY to RAW_ETHERTYPE 2010-08-04 10:44:19 -07:00