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svcrdma: Cleanup DMA unmapping in error paths.

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There are several error paths in the code that do not unmap DMA. This
patch adds calls to svc_rdma_unmap_dma to free these DMA contexts.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Tom Tucker 2010-10-12 15:33:57 -05:00 committed by J. Bruce Fields
parent b432e6b3d9
commit 4a84386fc2
3 changed files with 17 additions and 15 deletions
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1
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
View file

@ -495,6 +495,7 @@ static int rdma_read_xdr(struct svcxprt_rdma *xprt,
printk(KERN_ERR "svcrdma: Error %d posting RDMA_READ\n",
err);
set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
svc_rdma_unmap_dma(ctxt);
svc_rdma_put_context(ctxt, 0);
goto out;
}

2
net/sunrpc/xprtrdma/svc_rdma_sendto.c
View file

@ -367,6 +367,8 @@ static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp,
goto err;
return 0;
err:
svc_rdma_unmap_dma(ctxt);
svc_rdma_put_frmr(xprt, vec->frmr);
svc_rdma_put_context(ctxt, 0);
/* Fatal error, close transport */
return -EIO;

29
net/sunrpc/xprtrdma/svc_rdma_transport.c
View file

@ -512,9 +512,9 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt)
ctxt->sge[sge_no].addr = pa;
ctxt->sge[sge_no].length = PAGE_SIZE;
ctxt->sge[sge_no].lkey = xprt->sc_dma_lkey;
ctxt->count = sge_no + 1;
buflen += PAGE_SIZE;
}
ctxt->count = sge_no;
recv_wr.next = NULL;
recv_wr.sg_list = &ctxt->sge[0];
recv_wr.num_sge = ctxt->count;
@ -530,6 +530,7 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt)
return ret;
err_put_ctxt:
svc_rdma_unmap_dma(ctxt);
svc_rdma_put_context(ctxt, 1);
return -ENOMEM;
}
@ -1308,7 +1309,6 @@ void svc_rdma_send_error(struct svcxprt_rdma *xprt, struct rpcrdma_msg *rmsgp,
enum rpcrdma_errcode err)
{
struct ib_send_wr err_wr;
struct ib_sge sge;
struct page *p;
struct svc_rdma_op_ctxt *ctxt;
u32 *va;
@ -1321,26 +1321,27 @@ void svc_rdma_send_error(struct svcxprt_rdma *xprt, struct rpcrdma_msg *rmsgp,
/* XDR encode error */
length = svc_rdma_xdr_encode_error(xprt, rmsgp, err, va);
ctxt = svc_rdma_get_context(xprt);
ctxt->direction = DMA_FROM_DEVICE;
ctxt->count = 1;
ctxt->pages[0] = p;
/* Prepare SGE for local address */
sge.addr = ib_dma_map_page(xprt->sc_cm_id->device,
p, 0, PAGE_SIZE, DMA_FROM_DEVICE);
if (ib_dma_mapping_error(xprt->sc_cm_id->device, sge.addr)) {
ctxt->sge[0].addr = ib_dma_map_page(xprt->sc_cm_id->device,
p, 0, length, DMA_FROM_DEVICE);
if (ib_dma_mapping_error(xprt->sc_cm_id->device, ctxt->sge[0].addr)) {
put_page(p);
return;
}
atomic_inc(&xprt->sc_dma_used);
sge.lkey = xprt->sc_dma_lkey;
sge.length = length;
ctxt = svc_rdma_get_context(xprt);
ctxt->count = 1;
ctxt->pages[0] = p;
ctxt->sge[0].lkey = xprt->sc_dma_lkey;
ctxt->sge[0].length = length;
/* Prepare SEND WR */
memset(&err_wr, 0, sizeof err_wr);
ctxt->wr_op = IB_WR_SEND;
err_wr.wr_id = (unsigned long)ctxt;
err_wr.sg_list = &sge;
err_wr.sg_list = ctxt->sge;
err_wr.num_sge = 1;
err_wr.opcode = IB_WR_SEND;
err_wr.send_flags = IB_SEND_SIGNALED;
@ -1350,9 +1351,7 @@ void svc_rdma_send_error(struct svcxprt_rdma *xprt, struct rpcrdma_msg *rmsgp,
if (ret) {
dprintk("svcrdma: Error %d posting send for protocol error\n",
ret);
ib_dma_unmap_page(xprt->sc_cm_id->device,
sge.addr, PAGE_SIZE,
DMA_FROM_DEVICE);
svc_rdma_unmap_dma(ctxt);
svc_rdma_put_context(ctxt, 1);
}
}