From 1543e317f1da31b75942316931e8f491a8920811 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 04 Jan 2024 10:08:02 +0000
Subject: [PATCH] disable FB
---
kernel/drivers/usb/core/devices.c | 68 ++++------------------------------
1 files changed, 8 insertions(+), 60 deletions(-)
diff --git a/kernel/drivers/usb/core/devices.c b/kernel/drivers/usb/core/devices.c
index 3de3c75..d8b0041 100644
--- a/kernel/drivers/usb/core/devices.c
+++ b/kernel/drivers/usb/core/devices.c
@@ -39,7 +39,6 @@
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/gfp.h>
-#include <linux/poll.h>
#include <linux/usb.h>
#include <linux/usbdevice_fs.h>
#include <linux/usb/hcd.h>
@@ -97,22 +96,6 @@
/* E: Ad=xx(s) Atr=xx(ssss) MxPS=dddd Ivl=D?s */
"E: Ad=%02x(%c) Atr=%02x(%-4s) MxPS=%4d Ivl=%d%cs\n";
-/*
- * Wait for an connect/disconnect event to happen. We initialize
- * the event counter with an odd number, and each event will increment
- * the event counter by two, so it will always _stay_ odd. That means
- * that it will never be zero, so "event 0" will never match a current
- * event, and thus 'poll' will always trigger as readable for the first
- * time it gets called.
- */
-static struct device_connect_event {
- atomic_t count;
- wait_queue_head_t wait;
-} device_event = {
- .count = ATOMIC_INIT(1),
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER(device_event.wait)
-};
-
struct class_info {
int class;
char *class_name;
@@ -133,6 +116,10 @@
{USB_CLASS_CSCID, "scard"},
{USB_CLASS_CONTENT_SEC, "c-sec"},
{USB_CLASS_VIDEO, "video"},
+ {USB_CLASS_PERSONAL_HEALTHCARE, "perhc"},
+ {USB_CLASS_AUDIO_VIDEO, "av"},
+ {USB_CLASS_BILLBOARD, "blbrd"},
+ {USB_CLASS_USB_TYPE_C_BRIDGE, "bridg"},
{USB_CLASS_WIRELESS_CONTROLLER, "wlcon"},
{USB_CLASS_MISC, "misc"},
{USB_CLASS_APP_SPEC, "app."},
@@ -141,12 +128,6 @@
};
/*****************************************************************/
-
-void usbfs_conn_disc_event(void)
-{
- atomic_add(2, &device_event.count);
- wake_up(&device_event.wait);
-}
static const char *class_decode(const int class)
{
@@ -176,38 +157,25 @@
switch (usb_endpoint_type(desc)) {
case USB_ENDPOINT_XFER_CONTROL:
type = "Ctrl";
- if (speed == USB_SPEED_HIGH) /* uframes per NAK */
- interval = desc->bInterval;
- else
- interval = 0;
dir = 'B'; /* ctrl is bidirectional */
break;
case USB_ENDPOINT_XFER_ISOC:
type = "Isoc";
- interval = 1 << (desc->bInterval - 1);
break;
case USB_ENDPOINT_XFER_BULK:
type = "Bulk";
- if (speed == USB_SPEED_HIGH && dir == 'O') /* uframes per NAK */
- interval = desc->bInterval;
- else
- interval = 0;
break;
case USB_ENDPOINT_XFER_INT:
type = "Int.";
- if (speed == USB_SPEED_HIGH || speed >= USB_SPEED_SUPER)
- interval = 1 << (desc->bInterval - 1);
- else
- interval = desc->bInterval;
break;
default: /* "can't happen" */
return start;
}
- interval *= (speed == USB_SPEED_HIGH ||
- speed >= USB_SPEED_SUPER) ? 125 : 1000;
- if (interval % 1000)
+
+ interval = usb_decode_interval(desc, speed);
+ if (interval % 1000) {
unit = 'u';
- else {
+ } else {
unit = 'm';
interval /= 1000;
}
@@ -598,8 +566,6 @@
return -EINVAL;
if (nbytes <= 0)
return 0;
- if (!access_ok(VERIFY_WRITE, buf, nbytes))
- return -EFAULT;
mutex_lock(&usb_bus_idr_lock);
/* print devices for all busses */
@@ -621,25 +587,7 @@
return total_written;
}
-/* Kernel lock for "lastev" protection */
-static __poll_t usb_device_poll(struct file *file,
- struct poll_table_struct *wait)
-{
- unsigned int event_count;
-
- poll_wait(file, &device_event.wait, wait);
-
- event_count = atomic_read(&device_event.count);
- if (file->f_version != event_count) {
- file->f_version = event_count;
- return EPOLLIN | EPOLLRDNORM;
- }
-
- return 0;
-}
-
const struct file_operations usbfs_devices_fops = {
.llseek = no_seek_end_llseek,
.read = usb_device_read,
- .poll = usb_device_poll,
};
--
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