[SUNSAB]: Comment out powering down of chip for now.

diff --git a/drivers/serial/sunsab.c b/drivers/serial/sunsab.c
index e93c8e9b3b7a9d9399a82e3d2b2fc2609728db13..2b897791ea3185a3b6df6f717439fbc8b46df71a 100644 (file)
--- a/drivers/serial/sunsab.c
+++ b/drivers/serial/sunsab.c
@@ -583,10 +583,22 @@ static void sunsab_shutdown(struct uart_port *port)
        tmp &= ~SAB82532_MODE_RAC;
        writeb(tmp, &up->regs->rw.mode);
 
+       /*
+        * XXX FIXME
+        *
+        * If the chip is powered down here the system hangs/crashes during
+        * reboot or shutdown.  This needs to be investigated further,
+        * similar behaviour occurs in 2.4 when the driver is configured
+        * as a module only.  One hint may be that data is sometimes
+        * transmitted at 9600 baud during shutdown (regardless of the
+        * speed the chip was configured for when the port was open).
+        */
+#if 0
        /* Power Down */        
        tmp = readb(&up->regs->rw.ccr0);
        tmp &= ~SAB82532_CCR0_PU;
        writeb(tmp, &up->regs->rw.ccr0);
+#endif
 
        spin_unlock_irqrestore(&up->port.lock, flags);
 }