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USB: safe_serial: reimplement read using generic framework

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Use process_read_urb to implement read processing.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Johan Hovold 2010-05-19 00:01:31 +02:00 • committed by Greg Kroah-Hartman
parent 241c80ea72
commit 12e2e52cc5
1 changed files with 8 additions and 39 deletions
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47
drivers/usb/serial/safe_serial.c
View file

@ -213,38 +213,20 @@ static __u16 __inline__ fcs_compute10(unsigned char *sp, int len, __u16 fcs)
return fcs; return fcs;
} }
static void safe_read_bulk_callback(struct urb *urb) static void safe_process_read_urb(struct urb *urb)
{ {
struct usb_serial_port *port = urb->context; struct usb_serial_port *port = urb->context;
unsigned char *data = urb->transfer_buffer; unsigned char *data = urb->transfer_buffer;
unsigned char length = urb->actual_length; unsigned char length = urb->actual_length;
struct tty_struct *tty; struct tty_struct *tty;
int result;
int status = urb->status;
dbg("%s", __func__); if (!length)
if (status) {
dbg("%s - nonzero read bulk status received: %d",
__func__, status);
return; return;
}
dbg("safe_read_bulk_callback length: %d",
port->read_urb->actual_length);
#ifdef ECHO_RCV
{
int i;
unsigned char *cp = port->read_urb->transfer_buffer;
for (i = 0; i < port->read_urb->actual_length; i++) {
if ((i % 32) == 0)
printk("\nru[%02x] ", i);
printk("%02x ", *cp++);
}
printk("\n");
}
#endif
tty = tty_port_tty_get(&port->port); tty = tty_port_tty_get(&port->port);
if (!tty)
return;
if (safe) { if (safe) {
__u16 fcs; __u16 fcs;
fcs = fcs_compute10(data, length, CRC10_INITFCS); fcs = fcs_compute10(data, length, CRC10_INITFCS);
@ -268,21 +250,8 @@ static void safe_read_bulk_callback(struct urb *urb)
tty_insert_flip_string(tty, data, length); tty_insert_flip_string(tty, data, length);
tty_flip_buffer_push(tty); tty_flip_buffer_push(tty);
} }
tty_kref_put(tty); tty_kref_put(tty);
/* Continue trying to always read */
usb_fill_bulk_urb(urb, port->serial->dev,
usb_rcvbulkpipe(port->serial->dev,
port->bulk_in_endpointAddress),
urb->transfer_buffer, urb->transfer_buffer_length,
safe_read_bulk_callback, port);
result = usb_submit_urb(urb, GFP_ATOMIC);
if (result)
dev_err(&port->dev,
"%s - failed resubmitting read urb, error %d\n",
__func__, result);
/* FIXME: Need a mechanism to retry later if this happens */
} }
static int safe_prepare_write_buffer(struct usb_serial_port *port, static int safe_prepare_write_buffer(struct usb_serial_port *port,
@ -343,7 +312,7 @@ static struct usb_serial_driver safe_device = {
.id_table = id_table, .id_table = id_table,
.usb_driver = &safe_driver, .usb_driver = &safe_driver,
.num_ports = 1, .num_ports = 1,
.read_bulk_callback = safe_read_bulk_callback, .process_read_urb = safe_process_read_urb,
.prepare_write_buffer = safe_prepare_write_buffer, .prepare_write_buffer = safe_prepare_write_buffer,
.attach = safe_startup, .attach = safe_startup,
}; };