nvme-tcp: fix data digest pointer calculation

commit d89b9f3bbb58e9e378881209756b0723694f22ff upstream.

ddgst is of type __le32, &req->ddgst + req->offset
increases &req->ddgst by 4 * req->offset, fix this by
type casting &req->ddgst to u8 *.

Fixes: 3f2304f8c6d6 ("nvme-tcp: add NVMe over TCP host driver")
Signed-off-by: Varun Prakash <varun@chelsio.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index f3a7b6c..afef377 100644 (file)
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -1040,7 +1040,7 @@ static int nvme_tcp_try_send_ddgst(struct nvme_tcp_request *req)
        int ret;
        struct msghdr msg = { .msg_flags = MSG_DONTWAIT };
        struct kvec iov = {
-               .iov_base = &req->ddgst + req->offset,
+               .iov_base = (u8 *)&req->ddgst + req->offset,
                .iov_len = NVME_TCP_DIGEST_LENGTH - req->offset
        };