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path: root/drivers/usb/gadget/serial.c
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Diffstat (limited to 'drivers/usb/gadget/serial.c')
-rw-r--r--drivers/usb/gadget/serial.c19
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c
index 65e084a2c87e..2e6926b33455 100644
--- a/drivers/usb/gadget/serial.c
+++ b/drivers/usb/gadget/serial.c
@@ -1271,6 +1271,7 @@ static int gs_recv_packet(struct gs_dev *dev, char *packet, unsigned int size)
unsigned int len;
struct gs_port *port;
int ret;
+ struct tty_struct *tty;
/* TEMPORARY -- only port 0 is supported right now */
port = dev->dev_port[0];
@@ -1290,7 +1291,10 @@ static int gs_recv_packet(struct gs_dev *dev, char *packet, unsigned int size)
goto exit;
}
- if (port->port_tty == NULL) {
+
+ tty = port->port_tty;
+
+ if (tty == NULL) {
printk(KERN_ERR "gs_recv_packet: port=%d, NULL tty pointer\n",
port->port_num);
ret = -EIO;
@@ -1304,20 +1308,13 @@ static int gs_recv_packet(struct gs_dev *dev, char *packet, unsigned int size)
goto exit;
}
- len = (unsigned int)(TTY_FLIPBUF_SIZE - port->port_tty->flip.count);
- if (len < size)
- size = len;
-
- if (size > 0) {
- memcpy(port->port_tty->flip.char_buf_ptr, packet, size);
- port->port_tty->flip.char_buf_ptr += size;
- port->port_tty->flip.count += size;
+ len = tty_buffer_request_room(tty, size);
+ if (len > 0) {
+ tty_insert_flip_string(tty, packet, len);
tty_flip_buffer_push(port->port_tty);
wake_up_interruptible(&port->port_tty->read_wait);
}
-
ret = 0;
-
exit:
spin_unlock(&port->port_lock);
return ret;