tc35815: Fix receiver hangup on Rx FIFO overflow

[linux-2.6-omap-h63xx.git] / fs / pipe.c

diff --git a/fs/pipe.c b/fs/pipe.c
index f73492b6817ea37d356b63f8bdfd81a960156ca7..ec228bc9f8824128ea99c5cb24abc743063e00bb 100644 (file)
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -17,6 +17,7 @@
 #include <linux/highmem.h>
 #include <linux/pagemap.h>
 #include <linux/audit.h>
+#include <linux/syscalls.h>
 
 #include <asm/uaccess.h>
 #include <asm/ioctls.h>
@@ -1075,6 +1076,26 @@ int do_pipe(int *fd)
        return error;
 }
 
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way Unix traditionally does this, though.
+ */
+asmlinkage long __weak sys_pipe(int __user *fildes)
+{
+       int fd[2];
+       int error;
+
+       error = do_pipe(fd);
+       if (!error) {
+               if (copy_to_user(fildes, fd, sizeof(fd))) {
+                       sys_close(fd[0]);
+                       sys_close(fd[1]);
+                       error = -EFAULT;
+               }
+       }
+       return error;
+}
+
 /*
  * pipefs should _never_ be mounted by userland - too much of security hassle,
  * no real gain from having the whole whorehouse mounted. So we don't need