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Commit 0d956e69 authored by Chuck Lever's avatar Chuck Lever Committed by J. Bruce Fields
Browse files

svcrdma: Clean-up svc_rdma_unmap_dma 



There's no longer a need to compare each SGE's lkey with the PD's
local_dma_lkey. Now that FRWR is gone, all DMA mappings are for
pages that were registered with this key.

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent 463e63d7

net/sunrpc/xprtrdma/svc_rdma_transport.c

+5 −14
Original line number Original line Diff line number Diff line
@@ -225,22 +225,13 @@ void svc_rdma_unmap_dma(struct svc_rdma_op_ctxt *ctxt) 
{

{

	struct svcxprt_rdma *xprt = ctxt->xprt;

	struct svcxprt_rdma *xprt = ctxt->xprt;

	struct ib_device *device = xprt->sc_cm_id->device;

	struct ib_device *device = xprt->sc_cm_id->device;

	u32 lkey = xprt->sc_pd->local_dma_lkey;

	unsigned int i;

	unsigned int i;





	for (i = 0; i < ctxt->mapped_sges; i++) {

	for (i = 0; i < ctxt->mapped_sges; i++)

		/*

		 * Unmap the DMA addr in the SGE if the lkey matches

		 * the local_dma_lkey, otherwise, ignore it since it is

		 * an FRMR lkey and will be unmapped later when the

		 * last WR that uses it completes.

		 */

		if (ctxt->sge[i].lkey == lkey)

		ib_dma_unmap_page(device,

		ib_dma_unmap_page(device,

				  ctxt->sge[i].addr,

				  ctxt->sge[i].addr,

				  ctxt->sge[i].length,

				  ctxt->sge[i].length,

				  ctxt->direction);

				  ctxt->direction);

	}

	ctxt->mapped_sges = 0;

	ctxt->mapped_sges = 0;

}

}