X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fserial%2F8250.c;h=90621c3312bc662b4d97f178cd3f3cc14cc16d33;hb=8248daac6b9cde7748a659dcabea6584d62a9fd8;hp=98ec861853280672d0828342184c73025dc555cc;hpb=ef29498655b18d2bfd69048e20835d19333981ab;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 98ec8618532..90621c3312b 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -1196,7 +1196,7 @@ static void serial8250_enable_ms(struct uart_port *port)
 }
 
 static void
-receive_chars(struct uart_8250_port *up, int *status)
+receive_chars(struct uart_8250_port *up, unsigned int *status)
 {
 	struct tty_struct *tty = up->port.info->tty;
 	unsigned char ch, lsr = *status;
@@ -1310,7 +1310,8 @@ static unsigned int check_modem_status(struct uart_8250_port *up)
 {
 	unsigned int status = serial_in(up, UART_MSR);
 
-	if (status & UART_MSR_ANY_DELTA && up->ier & UART_IER_MSI) {
+	if (status & UART_MSR_ANY_DELTA && up->ier & UART_IER_MSI &&
+	    up->port.info != NULL) {
 		if (status & UART_MSR_TERI)
 			up->port.icount.rng++;
 		if (status & UART_MSR_DDSR)
@@ -1333,8 +1334,9 @@ static inline void
 serial8250_handle_port(struct uart_8250_port *up)
 {
 	unsigned int status;
+	unsigned long flags;
 
-	spin_lock(&up->port.lock);
+	spin_lock_irqsave(&up->port.lock, flags);
 
 	status = serial_inp(up, UART_LSR);
 
@@ -1346,7 +1348,7 @@ serial8250_handle_port(struct uart_8250_port *up)
 	if (status & UART_LSR_THRE)
 		transmit_chars(up);
 
-	spin_unlock(&up->port.lock);
+	spin_unlock_irqrestore(&up->port.lock, flags);
 }
 
 /*