Added usbtty_configured() check. Fixed attribute(packed) warnings.

V3: Fixed line-wrap problem due to user error in mail!

Added usb_configured() checks in usbtty_puts() and usbtty_putc() to get around a hang
when usb is not connected and the user has set up multi-io (setenv stdout serial,usbtty etc).
Got rid of redundant __attribute__((packed)) directives that were causing warnings from gcc.

Signed-off-by: Atin Malaviya <atin.malaviya@gmail.com>
Signed-off-by: Remy Bohmer <linux@bohmer.net>

drivers/serial/usbtty.c

@@ -150,8 +150,7 @@ struct acm_config_desc {
 
 	/* Slave Interface */
 	struct usb_interface_descriptor data_class_interface;
-	struct usb_endpoint_descriptor
-		data_endpoints[NUM_ENDPOINTS-1] __attribute__((packed));
+	struct usb_endpoint_descriptor data_endpoints[NUM_ENDPOINTS-1];
 } __attribute__((packed));
 
 static struct acm_config_desc acm_configuration_descriptors[NUM_CONFIGS] = {
@@ -280,10 +279,8 @@ static struct rs232_emu rs232_desc={
 struct gserial_config_desc {
 
 	struct usb_configuration_descriptor configuration_desc;
-	struct usb_interface_descriptor
-		interface_desc[NUM_GSERIAL_INTERFACES] __attribute__((packed));
-	struct usb_endpoint_descriptor
-		data_endpoints[NUM_ENDPOINTS] __attribute__((packed));
+	struct usb_interface_descriptor	interface_desc[NUM_GSERIAL_INTERFACES];
+	struct usb_endpoint_descriptor data_endpoints[NUM_ENDPOINTS];
 
 } __attribute__((packed));
 
@@ -433,6 +430,9 @@ int usbtty_getc (void)
  */
 void usbtty_putc (const char c)
 {
+	if (!usbtty_configured ())
+		return;
+
 	buf_push (&usbtty_output, &c, 1);
 	/* If \n, also do \r */
 	if (c == '\n')
@@ -486,8 +486,12 @@ static void __usbtty_puts (const char *str, int len)
 void usbtty_puts (const char *str)
 {
 	int n;
-	int len = strlen (str);
+	int len;
+
+	if (!usbtty_configured ())
+		return;
 
+	len = strlen (str);
 	/* add '\r' for each '\n' */
 	while (len > 0) {
 		n = next_nl_pos (str);