[POWERPC] Don't shutdown TX on mpc5200 serial port if it is a console

If the serial port gets shut down, then console output stalls.  9 out
of 10 kernel hackers agree, this is a bad thing.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index f8c1761eb57f..35f8b86cc78f 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -257,9 +257,10 @@ mpc52xx_uart_shutdown(struct uart_port *port)
 {
         struct mpc52xx_psc __iomem *psc = PSC(port);
 
-        /* Shut down the port, interrupt and all */
+        /* Shut down the port.  Leave TX active if on a console port */
         out_8(&psc->command,MPC52xx_PSC_RST_RX);
-        out_8(&psc->command,MPC52xx_PSC_RST_TX);
+        if (!uart_console(port))
+                out_8(&psc->command,MPC52xx_PSC_RST_TX);
 
         port->read_status_mask = 0;
         out_be16(&psc->mpc52xx_psc_imr,port->read_status_mask);