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authorShirley Ma <shirley.ma@oracle.com>2014-05-28 10:34:24 -0400
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2014-06-04 08:56:49 -0400
commit196c69989d84ab902bbe545f7bd8ce78ee74dac4 (patch)
tree0df67e1edb7853b3cf161685d19694a66ddc73ee /net/sunrpc/xprtrdma
parent5bc4bc729275a0bfc2bfd04466e8ab7c85af2f6e (diff)
downloadop-kernel-dev-196c69989d84ab902bbe545f7bd8ce78ee74dac4.zip
op-kernel-dev-196c69989d84ab902bbe545f7bd8ce78ee74dac4.tar.gz
xprtrdma: Allocate missing pagelist
GETACL relies on transport layer to alloc memory for reply buffer. However xprtrdma assumes that the reply buffer (pagelist) has been pre-allocated in upper layer. This problem was reported by IOL OFA lab test on PPC. Signed-off-by: Shirley Ma <shirley.ma@oracle.com> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Edward Mossman <emossman@iol.unh.edu> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma')
-rw-r--r--net/sunrpc/xprtrdma/rpc_rdma.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 436d229..dc4a826 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -99,6 +99,12 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos,
page_base = xdrbuf->page_base & ~PAGE_MASK;
p = 0;
while (len && n < nsegs) {
+ if (!ppages[p]) {
+ /* alloc the pagelist for receiving buffer */
+ ppages[p] = alloc_page(GFP_ATOMIC);
+ if (!ppages[p])
+ return 0;
+ }
seg[n].mr_page = ppages[p];
seg[n].mr_offset = (void *)(unsigned long) page_base;
seg[n].mr_len = min_t(u32, PAGE_SIZE - page_base, len);
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