diff options
Diffstat (limited to 'drivers/usb/serial/generic.c')
| -rw-r--r-- | drivers/usb/serial/generic.c | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c index bbe005cefcfb..89fac36684c5 100644 --- a/drivers/usb/serial/generic.c +++ b/drivers/usb/serial/generic.c @@ -20,6 +20,7 @@ #include <linux/usb/serial.h> #include <linux/uaccess.h> #include <linux/kfifo.h> +#include <linux/serial.h> static int debug; @@ -41,7 +42,7 @@ static struct usb_device_id generic_device_ids[2]; /* Initially all zeroes. */ /* we want to look at all devices, as the vendor/product id can change * depending on the command line argument */ -static struct usb_device_id generic_serial_ids[] = { +static const struct usb_device_id generic_serial_ids[] = { {.driver_info = 42}, {} }; @@ -194,7 +195,7 @@ static int usb_serial_multi_urb_write(struct tty_struct *tty, if (port->urbs_in_flight > port->serial->type->max_in_flight_urbs) { spin_unlock_irqrestore(&port->lock, flags); - dbg("%s - write limit hit\n", __func__); + dbg("%s - write limit hit", __func__); return bwrite; } port->tx_bytes_flight += towrite; @@ -276,7 +277,7 @@ static int usb_serial_generic_write_start(struct usb_serial_port *port) if (port->write_urb_busy) start_io = false; else { - start_io = (__kfifo_len(port->write_fifo) != 0); + start_io = (kfifo_len(&port->write_fifo) != 0); port->write_urb_busy = start_io; } spin_unlock_irqrestore(&port->lock, flags); @@ -285,7 +286,7 @@ static int usb_serial_generic_write_start(struct usb_serial_port *port) return 0; data = port->write_urb->transfer_buffer; - count = kfifo_get(port->write_fifo, data, port->bulk_out_size); + count = kfifo_out_locked(&port->write_fifo, data, port->bulk_out_size, &port->lock); usb_serial_debug_data(debug, &port->dev, __func__, count, data); /* set up our urb */ @@ -345,7 +346,7 @@ int usb_serial_generic_write(struct tty_struct *tty, return usb_serial_multi_urb_write(tty, port, buf, count); - count = kfifo_put(port->write_fifo, buf, count); + count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock); result = usb_serial_generic_write_start(port); if (result >= 0) @@ -370,7 +371,7 @@ int usb_serial_generic_write_room(struct tty_struct *tty) (serial->type->max_in_flight_urbs - port->urbs_in_flight); } else if (serial->num_bulk_out) - room = port->write_fifo->size - __kfifo_len(port->write_fifo); + room = kfifo_avail(&port->write_fifo); spin_unlock_irqrestore(&port->lock, flags); dbg("%s - returns %d", __func__, room); @@ -386,12 +387,12 @@ int usb_serial_generic_chars_in_buffer(struct tty_struct *tty) dbg("%s - port %d", __func__, port->number); - if (serial->type->max_in_flight_urbs) { - spin_lock_irqsave(&port->lock, flags); + spin_lock_irqsave(&port->lock, flags); + if (serial->type->max_in_flight_urbs) chars = port->tx_bytes_flight; - spin_unlock_irqrestore(&port->lock, flags); - } else if (serial->num_bulk_out) - chars = kfifo_len(port->write_fifo); + else if (serial->num_bulk_out) + chars = kfifo_len(&port->write_fifo); + spin_unlock_irqrestore(&port->lock, flags); dbg("%s - returns %d", __func__, chars); return chars; @@ -489,6 +490,8 @@ void usb_serial_generic_write_bulk_callback(struct urb *urb) dbg("%s - port %d", __func__, port->number); if (port->serial->type->max_in_flight_urbs) { + kfree(urb->transfer_buffer); + spin_lock_irqsave(&port->lock, flags); --port->urbs_in_flight; port->tx_bytes_flight -= urb->transfer_buffer_length; @@ -507,7 +510,7 @@ void usb_serial_generic_write_bulk_callback(struct urb *urb) if (status) { dbg("%s - nonzero multi-urb write bulk status " "received: %d", __func__, status); - kfifo_reset(port->write_fifo); + kfifo_reset_out(&port->write_fifo); } else usb_serial_generic_write_start(port); } @@ -583,7 +586,7 @@ int usb_serial_generic_resume(struct usb_serial *serial) for (i = 0; i < serial->num_ports; i++) { port = serial->port[i]; - if (!port->port.count) + if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) continue; if (port->read_urb) { |