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| author |   Bernard Metzler <bmt@zurich.ibm.com> | 2019-10-04 14:53:56 +0200 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2019-10-22 13:43:10 -0300 |
| commit | cf049bb31f7101d9672eaf97ade4fdd5171ddf26 (patch) | |
| tree | ec34cda94a0a96727517047b36929af1bced3a7f /drivers/infiniband/sw/siw/siw_main.c | |
| parent | ib/srp: Add missing new line after displaying fast_io_fail_tmo param (diff) | |
| download | linux-dev-cf049bb31f7101d9672eaf97ade4fdd5171ddf26.tar.xz linux-dev-cf049bb31f7101d9672eaf97ade4fdd5171ddf26.zip | |
RDMA/siw: Fix SQ/RQ drain logic
Storage ULPs (e.g. iSER & NVMeOF) use ib_drain_qp() to drain
QP/CQ. Current SIW's own drain routines do not properly wait until all
SQ/RQ elements are completed and reaped from the CQ. This may cause touch
after free issues. New logic relies on generic
__ib_drain_sq()/__ib_drain_rq() posting a final work request, which SIW
immediately flushes to CQ.
Fixes: 303ae1cdfdf7 ("rdma/siw: application interface")
Link: https://lore.kernel.org/r/20191004125356.20673-1-bmt@zurich.ibm.com
Signed-off-by: Krishnamraju Eraparaju <krishna2@chelsio.com>
Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/sw/siw/siw_main.c')
| -rw-r--r-- | drivers/infiniband/sw/siw/siw_main.c | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/drivers/infiniband/sw/siw/siw_main.c b/drivers/infiniband/sw/siw/siw_main.c index d1a1b7aa7d83..b8fe43074ad6 100644 --- a/drivers/infiniband/sw/siw/siw_main.c +++ b/drivers/infiniband/sw/siw/siw_main.c @@ -249,24 +249,6 @@ static struct ib_qp *siw_get_base_qp(struct ib_device *base_dev, int id) return NULL; } -static void siw_verbs_sq_flush(struct ib_qp *base_qp) -{ - struct siw_qp *qp = to_siw_qp(base_qp); - - down_write(&qp->state_lock); - siw_sq_flush(qp); - up_write(&qp->state_lock); -} - -static void siw_verbs_rq_flush(struct ib_qp *base_qp) -{ - struct siw_qp *qp = to_siw_qp(base_qp); - - down_write(&qp->state_lock); - siw_rq_flush(qp); - up_write(&qp->state_lock); -} - static const struct ib_device_ops siw_device_ops = { .owner = THIS_MODULE, .uverbs_abi_ver = SIW_ABI_VERSION, @@ -285,8 +267,6 @@ static const struct ib_device_ops siw_device_ops = { .destroy_cq = siw_destroy_cq, .destroy_qp = siw_destroy_qp, .destroy_srq = siw_destroy_srq, - .drain_rq = siw_verbs_rq_flush, - .drain_sq = siw_verbs_sq_flush, .get_dma_mr = siw_get_dma_mr, .get_port_immutable = siw_get_port_immutable, .iw_accept = siw_accept, |