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| author | Chuck Lever <chuck.lever@oracle.com> | 2017-04-11 20:23:02 +0300 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2017-04-25 23:12:22 +0300 |
| commit | 91a10c52975a8c89e146a4f740e64cd147ba8e8a (patch) | |
| tree | f9cf5ad426188a632479bfbd3890b02945d6e3ae /net/sunrpc/xprtrdma/rpc_rdma.c | |
| parent | fff09594edf5e9b8595a2cefdc07e54b70f81729 (diff) | |
| download | linux-91a10c52975a8c89e146a4f740e64cd147ba8e8a.tar.xz | |
xprtrdma: Use same device when mapping or syncing DMA buffers
When the underlying device driver is reloaded, ia->ri_device will be
replaced. All cached copies of that device pointer have to be
updated as well.
Commit 54cbd6b0c6b9 ("xprtrdma: Delay DMA mapping Send and Receive
buffers") added the rg_device field to each regbuf. As part of
handling a device removal, rpcrdma_dma_unmap_regbuf is invoked on
all regbufs for a transport.
Simply calling rpcrdma_dma_map_regbuf for each Receive buffer after
the driver has been reloaded should reinitialize rg_device correctly
for every case except rpcrdma_wc_receive, which still uses
rpcrdma_rep::rr_device.
Ensure the same device that was used to map a Receive buffer is also
used to sync it in rpcrdma_wc_receive by using rg_device there
instead of rr_device.
This is the only use of rr_device, so it can be removed.
The use of regbufs in the send path is also updated, for
completeness.
Fixes: 54cbd6b0c6b9 ("xprtrdma: Delay DMA mapping Send and ... ")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/rpc_rdma.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/rpc_rdma.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index a044be2d6ad7..e68131bed3ce 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -494,7 +494,7 @@ rpcrdma_prepare_hdr_sge(struct rpcrdma_ia *ia, struct rpcrdma_req *req, } sge->length = len; - ib_dma_sync_single_for_device(ia->ri_device, sge->addr, + ib_dma_sync_single_for_device(rdmab_device(rb), sge->addr, sge->length, DMA_TO_DEVICE); req->rl_send_wr.num_sge++; return true; @@ -523,7 +523,7 @@ rpcrdma_prepare_msg_sges(struct rpcrdma_ia *ia, struct rpcrdma_req *req, sge[sge_no].addr = rdmab_addr(rb); sge[sge_no].length = xdr->head[0].iov_len; sge[sge_no].lkey = rdmab_lkey(rb); - ib_dma_sync_single_for_device(device, sge[sge_no].addr, + ib_dma_sync_single_for_device(rdmab_device(rb), sge[sge_no].addr, sge[sge_no].length, DMA_TO_DEVICE); /* If there is a Read chunk, the page list is being handled |