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| author |   Chuck Lever <chuck.lever@oracle.com> | 2019-08-19 18:39:25 -0400 |
|---|---|---|
| committer |   Anna Schumaker <Anna.Schumaker@Netapp.com> | 2019-08-20 11:01:03 -0400 |
| commit | 36bdd9056b6a83d573ffdde282a5a91ce734c536 (patch) | |
| tree | a230582aa710250b0800c77df4b7a458b0d085b4 /net/sunrpc/xprtrdma/frwr_ops.c | |
| parent | xprtrdma: Update obsolete comment (diff) | |
| download | linux-dev-36bdd9056b6a83d573ffdde282a5a91ce734c536.tar.xz linux-dev-36bdd9056b6a83d573ffdde282a5a91ce734c536.zip | |
xprtrdma: Fix calculation of ri_max_segs again
Commit 302d3deb206 ("xprtrdma: Prevent inline overflow") added this
calculation back in 2016, but got it wrong. I tested only the lower
bound, which is why there is a max_t there. The upper bound should be
rounded up too.
Now, when using DIV_ROUND_UP, that takes care of the lower bound as
well.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to '')
| -rw-r--r-- | net/sunrpc/xprtrdma/frwr_ops.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c index a30f2ae49578..3a10bfff2125 100644 --- a/net/sunrpc/xprtrdma/frwr_ops.c +++ b/net/sunrpc/xprtrdma/frwr_ops.c @@ -260,8 +260,8 @@ int frwr_open(struct rpcrdma_ia *ia, struct rpcrdma_ep *ep) ep->rep_attr.cap.max_recv_wr += RPCRDMA_BACKWARD_WRS; ep->rep_attr.cap.max_recv_wr += 1; /* for ib_drain_rq */ - ia->ri_max_segs = max_t(unsigned int, 1, RPCRDMA_MAX_DATA_SEGS / - ia->ri_max_frwr_depth); + ia->ri_max_segs = + DIV_ROUND_UP(RPCRDMA_MAX_DATA_SEGS, ia->ri_max_frwr_depth); /* Reply chunks require segments for head and tail buffers */ ia->ri_max_segs += 2; if (ia->ri_max_segs > RPCRDMA_MAX_HDR_SEGS) |