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USB: adutux: refactor endpoint retrieval

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Use the new endpoint helpers to lookup the required interrupt-in and
interrupt-out endpoints.

Note that the descriptors are searched in reverse order to avoid any
regressions.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2017-03-17 11:35:34 +01:00 committed by Greg Kroah-Hartman
parent e0e9052034
commit e53e0342da
1 changed files with 8 additions and 23 deletions
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31
drivers/usb/misc/adutux.c
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@ -655,12 +655,10 @@ static int adu_probe(struct usb_interface *interface,
{
struct usb_device *udev = interface_to_usbdev(interface);
struct adu_device *dev = NULL;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
int retval = -ENOMEM;
int in_end_size;
int out_end_size;
int i;
int res;
/* allocate memory for our device state and initialize it */
dev = kzalloc(sizeof(struct adu_device), GFP_KERNEL);
@ -673,26 +671,13 @@ static int adu_probe(struct usb_interface *interface,
init_waitqueue_head(&dev->read_wait);
init_waitqueue_head(&dev->write_wait);
iface_desc = &interface->altsetting[0];
/* set up the endpoint information */
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
if (usb_endpoint_is_int_in(endpoint))
dev->interrupt_in_endpoint = endpoint;
if (usb_endpoint_is_int_out(endpoint))
dev->interrupt_out_endpoint = endpoint;
}
if (dev->interrupt_in_endpoint == NULL) {
dev_err(&interface->dev, "interrupt in endpoint not found\n");
retval = -ENODEV;
goto error;
}
if (dev->interrupt_out_endpoint == NULL) {
dev_err(&interface->dev, "interrupt out endpoint not found\n");
retval = -ENODEV;
res = usb_find_common_endpoints_reverse(&interface->altsetting[0],
NULL, NULL,
&dev->interrupt_in_endpoint,
&dev->interrupt_out_endpoint);
if (res) {
dev_err(&interface->dev, "interrupt endpoints not found\n");
retval = res;
goto error;
}