[CIFS] Add support for legacy servers part six. Fix read syntax so

we do not request more than negotiated buffer size even if buffer
size is small (smaller than one page)

Signed-off-by: Steve French (sfrench@us.ibm.com)

1 files changed, 7 insertions, 0 deletions

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 4173f23a71d9..3766db2bb7f2 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1278,6 +1278,13 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
              total_read += bytes_read, current_offset += bytes_read) {
                 current_read_size = min_t(const int, read_size - total_read,
                                           cifs_sb->rsize);
+                /* For windows me and 9x we do not want to request more
+                than it negotiated since it will refuse the read then */
+                if((pTcon->ses) && 
+                        !(pTcon->ses->capabilities & CAP_LARGE_FILES)) {
+                        current_read_size = min_t(const int, current_read_size,
+                                        pTcon->ses->server->maxBuf - 128);
+                }
                 rc = -EAGAIN;
                 while (rc == -EAGAIN) {
                         if ((open_file->invalidHandle) &&