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USB: fix error handling in kl5kusb 

- report errors
- cleanup in error case
- use of endianness macros

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Oliver Neukum 2007-03-29 11:23:54 +02:00 committed by Greg Kroah-Hartman
parent 5a9f4e3381
commit 9306fff17d
1 changed files with 20 additions and 8 deletions
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28
drivers/usb/serial/kl5kusb105.c
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@ -238,7 +238,7 @@ static int klsi_105_get_line_state(struct usb_serial_port *port,
if (rc < 0)
err("Reading line status failed (error = %d)", rc);
else {
status = status_buf[0] + (status_buf[1]<<8);
status = le16_to_cpu(*(u16 *)status_buf);
info("%s - read status %x %x", __FUNCTION__,
status_buf[0], status_buf[1]);
@ -257,7 +257,7 @@ static int klsi_105_get_line_state(struct usb_serial_port *port,
static int klsi_105_startup (struct usb_serial *serial)
{
struct klsi_105_private *priv;
int i;
int i, j;
/* check if we support the product id (see keyspan.c)
* FIXME
@ -265,12 +265,12 @@ static int klsi_105_startup (struct usb_serial *serial)
/* allocate the private data structure */
for (i=0; i<serial->num_ports; i++) {
int j;
priv = kmalloc(sizeof(struct klsi_105_private),
GFP_KERNEL);
if (!priv) {
dbg("%skmalloc for klsi_105_private failed.", __FUNCTION__);
return -ENOMEM;
i--;
goto err_cleanup;
}
/* set initial values for control structures */
priv->cfg.pktlen = 5;
@ -292,15 +292,14 @@ static int klsi_105_startup (struct usb_serial *serial)
priv->write_urb_pool[j] = urb;
if (urb == NULL) {
err("No more urbs???");
continue;
goto err_cleanup;
}
urb->transfer_buffer = NULL;
urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE,
GFP_KERNEL);
if (!urb->transfer_buffer) {
err("%s - out of memory for urb buffers.", __FUNCTION__);
continue;
goto err_cleanup;
}
}
@ -308,7 +307,20 @@ static int klsi_105_startup (struct usb_serial *serial)
init_waitqueue_head(&serial->port[i]->write_wait);
}
return (0);
return 0;
err_cleanup:
for (; i >= 0; i--) {
priv = usb_get_serial_port_data(serial->port[i]);
for (j=0; j < NUM_URBS; j++) {
if (priv->write_urb_pool[j]) {
kfree(priv->write_urb_pool[j]->transfer_buffer);
usb_free_urb(priv->write_urb_pool[j]);
}
}
usb_set_serial_port_data(serial->port[i], NULL);
}
return -ENOMEM;
} /* klsi_105_startup */