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path: root/drivers/usb/serial/mos7840.c
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Diffstat (limited to 'drivers/usb/serial/mos7840.c')
-rw-r--r--drivers/usb/serial/mos7840.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index ea27fb23967a..3821c53fcee9 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -284,9 +284,15 @@ static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
MOS_WDR_TIMEOUT);
+ if (ret < VENDOR_READ_LENGTH) {
+ if (ret >= 0)
+ ret = -EIO;
+ goto out;
+ }
+
*val = buf[0];
dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
-
+out:
kfree(buf);
return ret;
}
@@ -352,8 +358,13 @@ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
MOS_WDR_TIMEOUT);
+ if (ret < VENDOR_READ_LENGTH) {
+ if (ret >= 0)
+ ret = -EIO;
+ goto out;
+ }
*val = buf[0];
-
+out:
kfree(buf);
return ret;
}
@@ -1023,6 +1034,7 @@ static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
* (can't set it up in mos7840_startup as the structures *
* were not set up at that time.) */
if (port0->open_ports == 1) {
+ /* FIXME: Buffer never NULL, so URB is not submitted. */
if (serial->port[0]->interrupt_in_buffer == NULL) {
/* set up interrupt urb */
usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
@@ -1479,10 +1491,10 @@ static int mos7840_tiocmget(struct tty_struct *tty)
return -ENODEV;
status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
- if (status != 1)
+ if (status < 0)
return -EIO;
status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
- if (status != 1)
+ if (status < 0)
return -EIO;
result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
| ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
@@ -1952,7 +1964,6 @@ static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
tmp.line = mos7840_port->port->minor;
tmp.port = mos7840_port->port->port_number;
tmp.irq = 0;
- tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
tmp.baud_base = 9600;
tmp.close_delay = 5 * HZ;
@@ -2106,7 +2117,8 @@ static int mos7840_calc_num_ports(struct usb_serial *serial)
static int mos7840_attach(struct usb_serial *serial)
{
if (serial->num_bulk_in < serial->num_ports ||
- serial->num_bulk_out < serial->num_ports) {
+ serial->num_bulk_out < serial->num_ports ||
+ serial->num_interrupt_in < 1) {
dev_err(&serial->interface->dev, "missing endpoints\n");
return -ENODEV;
}