From b22da3d8526a935aa31e086e63f60ff3246cb61c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 07:24:11 +0000
Subject: [PATCH] add stmac read mac form eeprom
---
kernel/drivers/char/ppdev.c | 40 +++++++++++-----------------------------
1 files changed, 11 insertions(+), 29 deletions(-)
diff --git a/kernel/drivers/char/ppdev.c b/kernel/drivers/char/ppdev.c
index 51faafd..38b46c7 100644
--- a/kernel/drivers/char/ppdev.c
+++ b/kernel/drivers/char/ppdev.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* linux/drivers/char/ppdev.c
*
@@ -5,11 +6,6 @@
* application to use the parport subsystem.
*
* Copyright (C) 1998-2000, 2002 Tim Waugh <tim@cyberelk.net>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*
* A /dev/parportx device node represents an arbitrary device
* on port 'x'. The following operations are possible:
@@ -359,14 +355,19 @@
struct pp_struct *pp = file->private_data;
struct parport *port;
void __user *argp = (void __user *)arg;
+ struct ieee1284_info *info;
+ unsigned char reg;
+ unsigned char mask;
+ int mode;
+ s32 time32[2];
+ s64 time64[2];
+ struct timespec64 ts;
+ int ret;
/* First handle the cases that don't take arguments. */
switch (cmd) {
case PPCLAIM:
{
- struct ieee1284_info *info;
- int ret;
-
if (pp->flags & PP_CLAIMED) {
dev_dbg(&pp->pdev->dev, "you've already got it!\n");
return -EINVAL;
@@ -517,15 +518,6 @@
port = pp->pdev->port;
switch (cmd) {
- struct ieee1284_info *info;
- unsigned char reg;
- unsigned char mask;
- int mode;
- s32 time32[2];
- s64 time64[2];
- struct timespec64 ts;
- int ret;
-
case PPRSTATUS:
reg = parport_read_status(port);
if (copy_to_user(argp, ®, sizeof(reg)))
@@ -682,14 +674,6 @@
return ret;
}
-#ifdef CONFIG_COMPAT
-static long pp_compat_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- return pp_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
-}
-#endif
-
static int pp_open(struct inode *inode, struct file *file)
{
unsigned int minor = iminor(inode);
@@ -749,7 +733,7 @@
"negotiated back to compatibility mode because user-space forgot\n");
}
- if (pp->flags & PP_CLAIMED) {
+ if ((pp->flags & PP_CLAIMED) && pp->pdev) {
struct ieee1284_info *info;
info = &pp->pdev->port->ieee1284;
@@ -798,9 +782,7 @@
.write = pp_write,
.poll = pp_poll,
.unlocked_ioctl = pp_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = pp_compat_ioctl,
-#endif
+ .compat_ioctl = compat_ptr_ioctl,
.open = pp_open,
.release = pp_release,
};
--
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