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xprtrdma: Refactor __fmr_dma_unmap() 

Separate the DMA unmap operation from freeing the MW. In a
subsequent patch they will not always be done at the same time,
and they are not related operations (except by order; freeing
the MW must be the last step during invalidation).

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2016-05-02 14:42:38 -04:00 committed by Anna Schumaker
parent 766656b022
commit 763bc230b6
1 changed files with 2 additions and 5 deletions
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7
net/sunrpc/xprtrdma/fmr_ops.c
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@ -186,15 +186,10 @@ static void
__fmr_dma_unmap(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg)
{
struct ib_device *device = r_xprt->rx_ia.ri_device;
struct rpcrdma_mw *mw = seg->rl_mw;
int nsegs = seg->mr_nsegs;
seg->rl_mw = NULL;
while (nsegs--)
rpcrdma_unmap_one(device, seg++);
rpcrdma_put_mw(r_xprt, mw);
}
/* Invalidate all memory regions that were registered for "req".
@ -237,9 +232,11 @@ fmr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req)
seg = &req->rl_segments[i];
__fmr_dma_unmap(r_xprt, seg);
rpcrdma_put_mw(r_xprt, seg->rl_mw);
i += seg->mr_nsegs;
seg->mr_nsegs = 0;
seg->rl_mw = NULL;
}
req->rl_nchunks = 0;