Merge branch 'master' into for-next

Sync up with Linus' tree to be able to apply Cesar's patch
against newer version of the code.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 13 insertions, 8 deletions

diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index 0afba1b4b656..08f50afd5f2a 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -730,19 +730,24 @@ static unsigned int xdr_align_pages(struct xdr_stream *xdr, unsigned int len)
 
 	if (xdr->nwords == 0)
 		return 0;
-	if (nwords > xdr->nwords) {
-		nwords = xdr->nwords;
-		len = nwords << 2;
-	}
 	/* Realign pages to current pointer position */
 	iov  = buf->head;
-	if (iov->iov_len > cur)
+	if (iov->iov_len > cur) {
 		xdr_shrink_bufhead(buf, iov->iov_len - cur);
+		xdr->nwords = XDR_QUADLEN(buf->len - cur);
+	}
 
-	/* Truncate page data and move it into the tail */
-	if (buf->page_len > len)
+	if (nwords > xdr->nwords) {
+		nwords = xdr->nwords;
+		len = nwords << 2;
+	}
+	if (buf->page_len <= len)
+		len = buf->page_len;
+	else if (nwords < xdr->nwords) {
+		/* Truncate page data and move it into the tail */
 		xdr_shrink_pagelen(buf, buf->page_len - len);
-	xdr->nwords = XDR_QUADLEN(buf->len - cur);
+		xdr->nwords = XDR_QUADLEN(buf->len - cur);
+	}
 	return len;
 }