[newlib-cygwin] Revert "Cygwin: check for STATUS_PENDING in fhandler_base::raw_read"

[Ken Brown]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=674b4fe995d28a140cd2f1fec856d27b53ea62a9

commit 674b4fe995d28a140cd2f1fec856d27b53ea62a9
Author: Ken Brown <kbrown@cornell.edu>
Date:   Thu May 9 10:41:41 2019 -0400

    Revert "Cygwin: check for STATUS_PENDING in fhandler_base::raw_read"
    
    This reverts commit 10bf30bebf7feebbc3e376cbcac62a242cc240f3.  It was
    made because an incorrect implementation of duplex FIFOs.

Diff:
---
 winsup/cygwin/fhandler.cc | 14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc
index a0c3dcc..b0c9c50 100644
--- a/winsup/cygwin/fhandler.cc
+++ b/winsup/cygwin/fhandler.cc
@@ -215,23 +215,11 @@ fhandler_base::raw_read (void *ptr, size_t& len)
   NTSTATUS status;
   IO_STATUS_BLOCK io;
   int try_noreserve = 1;
-  DWORD waitret = WAIT_OBJECT_0;
 
 retry:
   status = NtReadFile (get_handle (), NULL, NULL, NULL, &io, ptr, len,
 		       NULL, NULL);
-  if (status == STATUS_PENDING)
-    {
-      waitret = cygwait (get_handle (), cw_infinite,
-			 cw_cancel | cw_sig_eintr);
-      if (waitret == WAIT_OBJECT_0)
-	status = io.Status;
-    }
-  if (waitret == WAIT_CANCELED)
-    pthread::static_cancel_self ();
-  else if (waitret == WAIT_SIGNALED)
-    set_errno (EINTR);
-  else if (NT_SUCCESS (status))
+  if (NT_SUCCESS (status))
     len = io.Information;
   else
     {