Merge tag 'ftracetest-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...

[sfrench/cifs-2.6.git] / Documentation / serial / driver

diff --git a/Documentation/serial/driver b/Documentation/serial/driver
index 3bba1aeb799c311c6a9ce735097a0a7f64ef24d3..ba64e4b892e913cb4d1ff4cc2741d9f6f422c633 100644 (file)
--- a/Documentation/serial/driver
+++ b/Documentation/serial/driver
@@ -140,6 +140,8 @@ hardware.
        will append the character to the circular buffer and then call
        start_tx() / stop_tx() to flush the data out.
 
+       Do not transmit if ch == '\0' (__DISABLED_CHAR).
+
        Locking: none.
        Interrupts: caller dependent.