[PATCH 5.4 27/51] nvme-tcp: fix data digest pointer calculation

[Greg Kroah-Hartman]

From: Varun Prakash <varun@xxxxxxxxxxx>

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@xxxxxxxxxxx>
Reviewed-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/nvme/host/tcp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -962,7 +962,7 @@ static int nvme_tcp_try_send_ddgst(struc
 	int ret;
 	struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_EOR };
 	struct kvec iov = {
-		.iov_base = &req->ddgst + req->offset,
+		.iov_base = (u8 *)&req->ddgst + req->offset,
 		.iov_len = NVME_TCP_DIGEST_LENGTH - req->offset
 	};