On Mon, Mar 17, 2014 at 01:10:05PM -0400, Jeff Layton wrote:
> The xdr_off value in dma_map_xdr gets passed to ib_dma_map_page as the
> offset into the page to be mapped. This calculation does not correctly
> take into account the case where the data starts at some offset into
> the page. Increment the xdr_off by the page_base to ensure that it is
> respected.
Thanks, applying.--b.
>
> Cc: Tom Tucker <tom@xxxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
> ---
> net/sunrpc/xprtrdma/svc_rdma_sendto.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
> index c1d124dc772b..5f14609b6336 100644
> --- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c
> +++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
> @@ -265,6 +265,7 @@ static dma_addr_t dma_map_xdr(struct svcxprt_rdma *xprt,
> xdr_off -= xdr->head[0].iov_len;
> if (xdr_off < xdr->page_len) {
> /* This offset is in the page list */
> + xdr_off += xdr->page_base;
> page = xdr->pages[xdr_off >> PAGE_SHIFT];
> xdr_off &= ~PAGE_MASK;
> } else {
> --
> 1.8.5.3
>
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