linux_dsm_epyc7002/drivers/infiniband/ulp
Nicholas Bellinger 03e7848a64 iser-target: Add missing se_cmd put for WRITE_PENDING in tx_comp_err
This patch fixes a bug where outstanding RDMA_READs with WRITE_PENDING
status require an extra target_put_sess_cmd() in isert_put_cmd() code
when called from isert_cq_tx_comp_err() + isert_cq_drain_comp_llist()
context during session shutdown.

The extra kref PUT is required so that transport_generic_free_cmd()
invokes the last target_put_sess_cmd() -> target_release_cmd_kref(),
which will complete(&se_cmd->cmd_wait_comp) the outstanding se_cmd
descriptor with WRITE_PENDING status, and awake the completion in
target_wait_for_sess_cmds() to invoke TFO->release_cmd().

The bug was manifesting itself in target_wait_for_sess_cmds() where
a se_cmd descriptor with WRITE_PENDING status would end up sleeping
indefinately.

Acked-by: Sagi Grimberg <sagig@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: <stable@vger.kernel.org> #3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-04-07 01:48:51 -07:00
..
ipoib Merge branches 'cma', 'cxgb4', 'flowsteer', 'ipoib', 'misc', 'mlx4', 'mlx5', 'ocrdma', 'qib', 'srp' and 'usnic' into for-next 2014-01-22 23:24:13 -08:00
iser IB/iser: Fix use after free in iser_snd_completion() 2014-02-14 09:48:09 -08:00
isert iser-target: Add missing se_cmd put for WRITE_PENDING in tx_comp_err 2014-04-07 01:48:51 -07:00
srp scsi_transport_srp: Fix a race condition 2014-01-21 10:46:17 -08:00
srpt target: Add TFO->abort_task for aborted task resources release 2014-04-07 01:48:51 -07:00