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USB: ssu100: remove max_packet_size calculation 

The max_packet_size logic is taken from ftdi_sio, but it's not needed
for this device.  This also makes proces_read_urb simpler.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Bill Pemberton 2010-10-21 14:43:05 -04:00 committed by Greg Kroah-Hartman
parent c8ddb2713c
commit f7043ecbb3
1 changed files with 8 additions and 48 deletions
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56
drivers/usb/serial/ssu100.c
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@ -79,7 +79,6 @@ struct ssu100_port_private {
u8 shadowLSR;
u8 shadowMSR;
wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
unsigned short max_packet_size;
struct async_icount icount;
};
@ -464,36 +463,6 @@ static int ssu100_ioctl(struct tty_struct *tty, struct file *file,
return -ENOIOCTLCMD;
}
static void ssu100_set_max_packet_size(struct usb_serial_port *port)
{
struct ssu100_port_private *priv = usb_get_serial_port_data(port);
struct usb_serial *serial = port->serial;
struct usb_device *udev = serial->dev;
struct usb_interface *interface = serial->interface;
struct usb_endpoint_descriptor *ep_desc = &interface->cur_altsetting->endpoint[1].desc;
unsigned num_endpoints;
int i;
unsigned long flags;
num_endpoints = interface->cur_altsetting->desc.bNumEndpoints;
dev_info(&udev->dev, "Number of endpoints %d\n", num_endpoints);
for (i = 0; i < num_endpoints; i++) {
dev_info(&udev->dev, "Endpoint %d MaxPacketSize %d\n", i+1,
interface->cur_altsetting->endpoint[i].desc.wMaxPacketSize);
ep_desc = &interface->cur_altsetting->endpoint[i].desc;
}
/* set max packet size based on descriptor */
spin_lock_irqsave(&priv->status_lock, flags);
priv->max_packet_size = ep_desc->wMaxPacketSize;
spin_unlock_irqrestore(&priv->status_lock, flags);
dev_info(&udev->dev, "Setting MaxPacketSize %d\n", priv->max_packet_size);
}
static int ssu100_attach(struct usb_serial *serial)
{
struct ssu100_port_private *priv;
@ -511,7 +480,6 @@ static int ssu100_attach(struct usb_serial *serial)
spin_lock_init(&priv->status_lock);
init_waitqueue_head(&priv->delta_msr_wait);
usb_set_serial_port_data(port, priv);
ssu100_set_max_packet_size(port);
return ssu100_initdevice(serial->dev);
}
@ -641,13 +609,14 @@ static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr,
}
static int ssu100_process_packet(struct tty_struct *tty,
struct usb_serial_port *port,
struct ssu100_port_private *priv,
char *packet, int len)
static int ssu100_process_packet(struct urb *urb,
struct tty_struct *tty)
{
int i;
struct usb_serial_port *port = urb->context;
char *packet = (char *)urb->transfer_buffer;
char flag = TTY_NORMAL;
u32 len = urb->actual_length;
int i;
char *ch;
dbg("%s - port %d", __func__, port->number);
@ -685,12 +654,8 @@ static int ssu100_process_packet(struct tty_struct *tty,
static void ssu100_process_read_urb(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
struct ssu100_port_private *priv = usb_get_serial_port_data(port);
char *data = (char *)urb->transfer_buffer;
struct tty_struct *tty;
int count = 0;
int i;
int len;
int count;
dbg("%s", __func__);
@ -698,10 +663,7 @@ static void ssu100_process_read_urb(struct urb *urb)
if (!tty)
return;
for (i = 0; i < urb->actual_length; i += priv->max_packet_size) {
len = min_t(int, urb->actual_length - i, priv->max_packet_size);
count += ssu100_process_packet(tty, port, priv, &data[i], len);
}
count = ssu100_process_packet(urb, tty);
if (count)
tty_flip_buffer_push(tty);
@ -717,8 +679,6 @@ static struct usb_serial_driver ssu100_device = {
.id_table = id_table,
.usb_driver = &ssu100_driver,
.num_ports = 1,
.bulk_in_size = 256,
.bulk_out_size = 256,
.open = ssu100_open,
.close = ssu100_close,
.attach = ssu100_attach,