usbip: vudc: make dev_desc attribute binary
We read a struct usb_device_descriptor from it, so make it an actual
binary attribute.
Signed-off-by: Igor Kotrasinski <i.kotrasinsk@gmail.com>
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Tested-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/usbip/vudc_sysfs.c b/drivers/usb/usbip/vudc_sysfs.c
index 25ca16a..40d5c8f 100644
--- a/drivers/usb/usbip/vudc_sysfs.c
+++ b/drivers/usb/usbip/vudc_sysfs.c
@@ -78,10 +78,13 @@
/*
* Exposes device descriptor from the gadget driver.
*/
-static ssize_t dev_desc_show(struct device *dev,
- struct device_attribute *attr, char *out)
+static ssize_t dev_desc_read(struct file *file, struct kobject *kobj,
+ struct bin_attribute *attr, char *out,
+ loff_t off, size_t count)
{
+ struct device *dev = kobj_to_dev(kobj);
struct vudc *udc = (struct vudc *)dev_get_drvdata(dev);
+ char *desc_ptr = (char *) &udc->dev_desc;
unsigned long flags;
int ret;
@@ -91,13 +94,13 @@
goto unlock;
}
- memcpy(out, &udc->dev_desc, sizeof(udc->dev_desc));
- ret = sizeof(udc->dev_desc);
+ memcpy(out, desc_ptr + off, count);
+ ret = count;
unlock:
spin_unlock_irqrestore(&udc->lock, flags);
return ret;
}
-static DEVICE_ATTR_RO(dev_desc);
+static BIN_ATTR_RO(dev_desc, sizeof(struct usb_device_descriptor));
static ssize_t store_sockfd(struct device *dev, struct device_attribute *attr,
const char *in, size_t count)
@@ -210,12 +213,17 @@
static DEVICE_ATTR_RO(usbip_status);
static struct attribute *dev_attrs[] = {
- &dev_attr_dev_desc.attr,
&dev_attr_usbip_sockfd.attr,
&dev_attr_usbip_status.attr,
NULL,
};
+static struct bin_attribute *dev_bin_attrs[] = {
+ &bin_attr_dev_desc,
+ NULL,
+};
+
const struct attribute_group vudc_attr_group = {
.attrs = dev_attrs,
+ .bin_attrs = dev_bin_attrs,
};