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| author | Gerd Rausch <gerd.rausch@oracle.com> | 2019-07-17 01:29:02 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-07-17 22:06:52 +0300 |
| commit | 5f33141d2fc05a2d2134ba0e7b47ce4aa88340f0 (patch) | |
| tree | f9d33d3deee13ee1c1b939495d18b238c48db70f /net/rds/ib_mr.h | |
| parent | c9467447fc50ec3715d8ec98f4da874fce539235 (diff) | |
| download | linux-5f33141d2fc05a2d2134ba0e7b47ce4aa88340f0.tar.xz | |
net/rds: Wait for the FRMR_IS_FREE (or FRMR_IS_STALE) transition after posting IB_WR_LOCAL_INV
In order to:
1) avoid a silly bouncing between "clean_list" and "drop_list"
triggered by function "rds_ib_reg_frmr" as it is releases frmr
regions whose state is not "FRMR_IS_FREE" right away.
2) prevent an invalid access error in a race from a pending
"IB_WR_LOCAL_INV" operation with a teardown ("dma_unmap_sg", "put_page")
and de-registration ("ib_dereg_mr") of the corresponding
memory region.
Signed-off-by: Gerd Rausch <gerd.rausch@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/ib_mr.h')
| -rw-r--r-- | net/rds/ib_mr.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/rds/ib_mr.h b/net/rds/ib_mr.h index ab26c20ed66f..9045a8c0edff 100644 --- a/net/rds/ib_mr.h +++ b/net/rds/ib_mr.h @@ -58,6 +58,8 @@ struct rds_ib_frmr { enum rds_ib_fr_state fr_state; bool fr_inv; wait_queue_head_t fr_inv_done; + bool fr_reg; + wait_queue_head_t fr_reg_done; struct ib_send_wr fr_wr; unsigned int dma_npages; unsigned int sg_byte_len; |