cifs: fix signed/unsigned mismatch on aio_read patch

The patch "CIFS: Add support for direct I/O read" had
a signed/unsigned mismatch (ssize_t vs. size_t) in the
return from one function.  Similar trivial change
in aio_write

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reported-by: Julia Lawall <julia.lawall@lip6.fr>

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 937ffa7..74c33d5 100644 (file)
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -2625,18 +2625,21 @@ cifs_write_from_iter(loff_t offset, size_t len, struct iov_iter *from,
                        break;
 
                if (ctx->direct_io) {
-                       cur_len = iov_iter_get_pages_alloc(
+                       ssize_t result;
+
+                       result = iov_iter_get_pages_alloc(
                                from, &pagevec, wsize, &start);
-                       if (cur_len < 0) {
+                       if (result < 0) {
                                cifs_dbg(VFS,
                                        "direct_writev couldn't get user pages "
                                        "(rc=%zd) iter type %d iov_offset %zd "
                                        "count %zd\n",
-                                       cur_len, from->type,
+                                       result, from->type,
                                        from->iov_offset, from->count);
                                dump_stack();
                                break;
                        }
+                       cur_len = (size_t)result;
                        iov_iter_advance(from, cur_len);
 
                        nr_pages =
@@ -3322,21 +3325,23 @@ cifs_send_async_read(loff_t offset, size_t len, struct cifsFileInfo *open_file,
                cur_len = min_t(const size_t, len, rsize);
 
                if (ctx->direct_io) {
+                       ssize_t result;
 
-                       cur_len = iov_iter_get_pages_alloc(
+                       result = iov_iter_get_pages_alloc(
                                        &direct_iov, &pagevec,
                                        cur_len, &start);
-                       if (cur_len < 0) {
+                       if (result < 0) {
                                cifs_dbg(VFS,
                                        "couldn't get user pages (cur_len=%zd)"
                                        " iter type %d"
                                        " iov_offset %zd count %zd\n",
-                                       cur_len, direct_iov.type,
+                                       result, direct_iov.type,
                                        direct_iov.iov_offset,
                                        direct_iov.count);
                                dump_stack();
                                break;
                        }
+                       cur_len = (size_t)result;
                        iov_iter_advance(&direct_iov, cur_len);
 
                        rdata = cifs_readdata_direct_alloc(