[ 18/21] USB: serial: ftdi_sio: Handle the old_termios == 0 case e.g. uart_resume_port()

From: Greg Kroah-Hartman
Date: Tue Jun 11 2013 - 16:36:33 EST


3.0-stable review patch. If anyone has any objections, please let me know.

------------------

From: Andrew Worsley <amworsley@xxxxxxxxx>

commit c515598e0f5769916c31c00392cc2bfe6af74e55 upstream.

Handle null old_termios in ftdi_set_termios() calls from uart_resume_port().

Signed-off-by: Andrew Worsley <amworsley@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
Cc: Lotfi Manseur <lotfi.manseur@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/usb/serial/ftdi_sio.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -2141,6 +2141,9 @@ static void ftdi_set_termios(struct tty_

cflag = termios->c_cflag;

+ if (old_termios == 0)
+ goto no_skip;
+
if (old_termios->c_cflag == termios->c_cflag
&& old_termios->c_ispeed == termios->c_ispeed
&& old_termios->c_ospeed == termios->c_ospeed)
@@ -2154,6 +2157,7 @@ static void ftdi_set_termios(struct tty_
(termios->c_cflag & (CSIZE|PARODD|PARENB|CMSPAR|CSTOPB)))
goto no_data_parity_stop_changes;

+no_skip:
/* Set number of data bits, parity, stop bits */

urb_value = 0;


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