diff options
| author | Michael J. Ruhl <michael.j.ruhl@intel.com> | 2018-06-20 19:29:08 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-06-26 23:35:55 +0300 |
| commit | b697d7d8c741f27b728a878fc55852b06d0f6f5e (patch) | |
| tree | 5d845e268d008f9a830180ad5b6ba244c149258d /drivers/infiniband/hw/hfi1/verbs_txreq.c | |
| parent | 4fae7f170416f970e5655f7e945ce69286b1c4ff (diff) | |
| download | linux-b697d7d8c741f27b728a878fc55852b06d0f6f5e.tar.xz | |
IB/hfi1: Fix incorrect mixing of ERR_PTR and NULL return values
The __get_txreq() function can return a pointer, ERR_PTR(-EBUSY), or NULL.
All of the relevant call sites look for IS_ERR, so the NULL return would
lead to a NULL pointer exception.
Do not use the ERR_PTR mechanism for this function.
Update all call sites to handle the return value correctly.
Clean up error paths to reflect return value.
Fixes: 45842abbb292 ("staging/rdma/hfi1: move txreq header code")
Cc: <stable@vger.kernel.org> # 4.9.x+
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Kamenee Arumugam <kamenee.arumugam@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/hfi1/verbs_txreq.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/verbs_txreq.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/hfi1/verbs_txreq.c b/drivers/infiniband/hw/hfi1/verbs_txreq.c index 873e48ea923f..c4ab2d5b4502 100644 --- a/drivers/infiniband/hw/hfi1/verbs_txreq.c +++ b/drivers/infiniband/hw/hfi1/verbs_txreq.c @@ -1,5 +1,5 @@ /* - * Copyright(c) 2016 - 2017 Intel Corporation. + * Copyright(c) 2016 - 2018 Intel Corporation. * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. @@ -94,7 +94,7 @@ struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev, struct rvt_qp *qp) __must_hold(&qp->s_lock) { - struct verbs_txreq *tx = ERR_PTR(-EBUSY); + struct verbs_txreq *tx = NULL; write_seqlock(&dev->txwait_lock); if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) { |