1 files changed, 4 insertions, 1 deletions

diff --git a/arch/um/os-Linux/sigio.c b/arch/um/os-Linux/sigio.c
index b2e1fd8e3571..3fc43b33db66 100644
--- a/arch/um/os-Linux/sigio.c
+++ b/arch/um/os-Linux/sigio.c
@@ -334,8 +334,11 @@ void maybe_sigio_broken(int fd, int read)
 
         sigio_lock();
         err = need_poll(&all_sigio_fds, all_sigio_fds.used + 1);
-        if(err)
+        if(err){
+                printk("maybe_sigio_broken - failed to add pollfd for "
+                       "descriptor %d\n", fd);
                 goto out;
+        }
 
         all_sigio_fds.poll[all_sigio_fds.used++] =
                 ((struct pollfd) { .fd          = fd,