mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 09:46:53 +07:00
d03f254f2e
Instead of having to audit all sysfs attributes, to ensure we get them right, use the default macros the driver core provides us (read-only, read-write) to make the code simpler, and to prevent any mistakes from ever happening. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
218 lines
4.9 KiB
C
218 lines
4.9 KiB
C
/*
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* drivers/usb/core/endpoint.c
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*
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* (C) Copyright 2002,2004,2006 Greg Kroah-Hartman
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* (C) Copyright 2002,2004 IBM Corp.
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* (C) Copyright 2006 Novell Inc.
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*
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* Endpoint sysfs stuff
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*
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*/
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include "usb.h"
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struct ep_device {
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struct usb_endpoint_descriptor *desc;
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struct usb_device *udev;
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struct device dev;
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};
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#define to_ep_device(_dev) \
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container_of(_dev, struct ep_device, dev)
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struct ep_attribute {
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struct attribute attr;
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ssize_t (*show)(struct usb_device *,
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struct usb_endpoint_descriptor *, char *);
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};
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#define to_ep_attribute(_attr) \
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container_of(_attr, struct ep_attribute, attr)
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#define usb_ep_attr(field, format_string) \
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static ssize_t field##_show(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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struct ep_device *ep = to_ep_device(dev); \
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return sprintf(buf, format_string, ep->desc->field); \
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} \
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static DEVICE_ATTR_RO(field)
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usb_ep_attr(bLength, "%02x\n");
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usb_ep_attr(bEndpointAddress, "%02x\n");
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usb_ep_attr(bmAttributes, "%02x\n");
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usb_ep_attr(bInterval, "%02x\n");
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static ssize_t wMaxPacketSize_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ep_device *ep = to_ep_device(dev);
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return sprintf(buf, "%04x\n",
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usb_endpoint_maxp(ep->desc) & 0x07ff);
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}
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static DEVICE_ATTR_RO(wMaxPacketSize);
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static ssize_t type_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct ep_device *ep = to_ep_device(dev);
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char *type = "unknown";
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switch (usb_endpoint_type(ep->desc)) {
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case USB_ENDPOINT_XFER_CONTROL:
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type = "Control";
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break;
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case USB_ENDPOINT_XFER_ISOC:
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type = "Isoc";
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break;
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case USB_ENDPOINT_XFER_BULK:
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type = "Bulk";
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break;
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case USB_ENDPOINT_XFER_INT:
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type = "Interrupt";
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break;
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}
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return sprintf(buf, "%s\n", type);
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}
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static DEVICE_ATTR_RO(type);
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static ssize_t interval_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct ep_device *ep = to_ep_device(dev);
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char unit;
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unsigned interval = 0;
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unsigned in;
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in = (ep->desc->bEndpointAddress & USB_DIR_IN);
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switch (usb_endpoint_type(ep->desc)) {
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case USB_ENDPOINT_XFER_CONTROL:
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if (ep->udev->speed == USB_SPEED_HIGH)
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/* uframes per NAK */
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interval = ep->desc->bInterval;
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break;
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case USB_ENDPOINT_XFER_ISOC:
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interval = 1 << (ep->desc->bInterval - 1);
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break;
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case USB_ENDPOINT_XFER_BULK:
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if (ep->udev->speed == USB_SPEED_HIGH && !in)
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/* uframes per NAK */
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interval = ep->desc->bInterval;
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break;
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case USB_ENDPOINT_XFER_INT:
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if (ep->udev->speed == USB_SPEED_HIGH)
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interval = 1 << (ep->desc->bInterval - 1);
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else
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interval = ep->desc->bInterval;
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break;
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}
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interval *= (ep->udev->speed == USB_SPEED_HIGH) ? 125 : 1000;
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if (interval % 1000)
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unit = 'u';
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else {
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unit = 'm';
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interval /= 1000;
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}
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return sprintf(buf, "%d%cs\n", interval, unit);
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}
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static DEVICE_ATTR_RO(interval);
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static ssize_t direction_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct ep_device *ep = to_ep_device(dev);
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char *direction;
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if (usb_endpoint_xfer_control(ep->desc))
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direction = "both";
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else if (usb_endpoint_dir_in(ep->desc))
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direction = "in";
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else
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direction = "out";
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return sprintf(buf, "%s\n", direction);
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}
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static DEVICE_ATTR_RO(direction);
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static struct attribute *ep_dev_attrs[] = {
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&dev_attr_bLength.attr,
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&dev_attr_bEndpointAddress.attr,
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&dev_attr_bmAttributes.attr,
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&dev_attr_bInterval.attr,
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&dev_attr_wMaxPacketSize.attr,
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&dev_attr_interval.attr,
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&dev_attr_type.attr,
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&dev_attr_direction.attr,
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NULL,
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};
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static struct attribute_group ep_dev_attr_grp = {
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.attrs = ep_dev_attrs,
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};
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static const struct attribute_group *ep_dev_groups[] = {
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&ep_dev_attr_grp,
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NULL
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};
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static void ep_device_release(struct device *dev)
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{
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struct ep_device *ep_dev = to_ep_device(dev);
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kfree(ep_dev);
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}
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struct device_type usb_ep_device_type = {
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.name = "usb_endpoint",
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.release = ep_device_release,
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};
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int usb_create_ep_devs(struct device *parent,
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struct usb_host_endpoint *endpoint,
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struct usb_device *udev)
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{
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struct ep_device *ep_dev;
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int retval;
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ep_dev = kzalloc(sizeof(*ep_dev), GFP_KERNEL);
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if (!ep_dev) {
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retval = -ENOMEM;
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goto exit;
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}
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ep_dev->desc = &endpoint->desc;
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ep_dev->udev = udev;
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ep_dev->dev.groups = ep_dev_groups;
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ep_dev->dev.type = &usb_ep_device_type;
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ep_dev->dev.parent = parent;
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dev_set_name(&ep_dev->dev, "ep_%02x", endpoint->desc.bEndpointAddress);
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retval = device_register(&ep_dev->dev);
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if (retval)
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goto error_register;
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device_enable_async_suspend(&ep_dev->dev);
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endpoint->ep_dev = ep_dev;
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return retval;
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error_register:
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put_device(&ep_dev->dev);
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exit:
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return retval;
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}
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void usb_remove_ep_devs(struct usb_host_endpoint *endpoint)
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{
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struct ep_device *ep_dev = endpoint->ep_dev;
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if (ep_dev) {
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device_unregister(&ep_dev->dev);
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endpoint->ep_dev = NULL;
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}
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}
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