From 1c055e55a242a33e574e48be530e06770a210dcd Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 19 Feb 2024 03:26:26 +0000
Subject: [PATCH] add r8169 read mac form eeprom
---
kernel/drivers/tty/mxser.c | 121 +++++++++++++++++++++------------------
1 files changed, 65 insertions(+), 56 deletions(-)
diff --git a/kernel/drivers/tty/mxser.c b/kernel/drivers/tty/mxser.c
index 8bc15cb..8344265 100644
--- a/kernel/drivers/tty/mxser.c
+++ b/kernel/drivers/tty/mxser.c
@@ -638,16 +638,15 @@
* This routine is called to set the UART divisor registers to match
* the specified baud rate for a serial port.
*/
-static int mxser_change_speed(struct tty_struct *tty)
+static void mxser_change_speed(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
unsigned cflag, cval, fcr;
- int ret = 0;
unsigned char status;
cflag = tty->termios.c_cflag;
if (!info->ioaddr)
- return ret;
+ return;
if (mxser_set_baud_method[tty->index] == 0)
mxser_set_baud(tty, tty_get_baud_rate(tty));
@@ -803,8 +802,6 @@
outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
outb(cval, info->ioaddr + UART_LCR);
-
- return ret;
}
static void mxser_check_modem_status(struct tty_struct *tty,
@@ -861,6 +858,7 @@
struct mxser_port *info = container_of(port, struct mxser_port, port);
unsigned long page;
unsigned long flags;
+ int ret;
page = __get_free_page(GFP_KERNEL);
if (!page)
@@ -870,9 +868,9 @@
if (!info->ioaddr || !info->type) {
set_bit(TTY_IO_ERROR, &tty->flags);
- free_page(page);
spin_unlock_irqrestore(&info->slock, flags);
- return 0;
+ ret = 0;
+ goto err_free_xmit;
}
info->port.xmit_buf = (unsigned char *) page;
@@ -898,8 +896,10 @@
if (capable(CAP_SYS_ADMIN)) {
set_bit(TTY_IO_ERROR, &tty->flags);
return 0;
- } else
- return -ENODEV;
+ }
+
+ ret = -ENODEV;
+ goto err_free_xmit;
}
/*
@@ -944,6 +944,10 @@
spin_unlock_irqrestore(&info->slock, flags);
return 0;
+err_free_xmit:
+ free_page(page);
+ info->port.xmit_buf = NULL;
+ return ret;
}
/*
@@ -1207,76 +1211,90 @@
* ------------------------------------------------------------
*/
static int mxser_get_serial_info(struct tty_struct *tty,
- struct serial_struct __user *retinfo)
+ struct serial_struct *ss)
{
struct mxser_port *info = tty->driver_data;
- struct serial_struct tmp = {
- .type = info->type,
- .line = tty->index,
- .port = info->ioaddr,
- .irq = info->board->irq,
- .flags = info->port.flags,
- .baud_base = info->baud_base,
- .close_delay = info->port.close_delay,
- .closing_wait = info->port.closing_wait,
- .custom_divisor = info->custom_divisor,
- };
- if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
- return -EFAULT;
+ struct tty_port *port = &info->port;
+
+ if (tty->index == MXSER_PORTS)
+ return -ENOTTY;
+
+ mutex_lock(&port->mutex);
+ ss->type = info->type,
+ ss->line = tty->index,
+ ss->port = info->ioaddr,
+ ss->irq = info->board->irq,
+ ss->flags = info->port.flags,
+ ss->baud_base = info->baud_base,
+ ss->close_delay = info->port.close_delay,
+ ss->closing_wait = info->port.closing_wait,
+ ss->custom_divisor = info->custom_divisor,
+ mutex_unlock(&port->mutex);
return 0;
}
static int mxser_set_serial_info(struct tty_struct *tty,
- struct serial_struct __user *new_info)
+ struct serial_struct *ss)
{
struct mxser_port *info = tty->driver_data;
struct tty_port *port = &info->port;
- struct serial_struct new_serial;
speed_t baud;
unsigned long sl_flags;
unsigned int flags;
int retval = 0;
- if (!new_info || !info->ioaddr)
- return -ENODEV;
- if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
- return -EFAULT;
+ if (tty->index == MXSER_PORTS)
+ return -ENOTTY;
+ if (tty_io_error(tty))
+ return -EIO;
- if (new_serial.irq != info->board->irq ||
- new_serial.port != info->ioaddr)
+ mutex_lock(&port->mutex);
+ if (!info->ioaddr) {
+ mutex_unlock(&port->mutex);
+ return -ENODEV;
+ }
+
+ if (ss->irq != info->board->irq ||
+ ss->port != info->ioaddr) {
+ mutex_unlock(&port->mutex);
return -EINVAL;
+ }
flags = port->flags & ASYNC_SPD_MASK;
if (!capable(CAP_SYS_ADMIN)) {
- if ((new_serial.baud_base != info->baud_base) ||
- (new_serial.close_delay != info->port.close_delay) ||
- ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
+ if ((ss->baud_base != info->baud_base) ||
+ (ss->close_delay != info->port.close_delay) ||
+ ((ss->flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK))) {
+ mutex_unlock(&port->mutex);
return -EPERM;
+ }
info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
- (new_serial.flags & ASYNC_USR_MASK));
+ (ss->flags & ASYNC_USR_MASK));
} else {
/*
* OK, past this point, all the error checking has been done.
* At this point, we start making changes.....
*/
port->flags = ((port->flags & ~ASYNC_FLAGS) |
- (new_serial.flags & ASYNC_FLAGS));
- port->close_delay = new_serial.close_delay * HZ / 100;
- port->closing_wait = new_serial.closing_wait * HZ / 100;
+ (ss->flags & ASYNC_FLAGS));
+ port->close_delay = ss->close_delay * HZ / 100;
+ port->closing_wait = ss->closing_wait * HZ / 100;
port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
- (new_serial.baud_base != info->baud_base ||
- new_serial.custom_divisor !=
+ (ss->baud_base != info->baud_base ||
+ ss->custom_divisor !=
info->custom_divisor)) {
- if (new_serial.custom_divisor == 0)
+ if (ss->custom_divisor == 0) {
+ mutex_unlock(&port->mutex);
return -EINVAL;
- baud = new_serial.baud_base / new_serial.custom_divisor;
+ }
+ baud = ss->baud_base / ss->custom_divisor;
tty_encode_baud_rate(tty, baud, baud);
}
}
- info->type = new_serial.type;
+ info->type = ss->type;
process_txrx_fifo(info);
@@ -1291,6 +1309,7 @@
if (retval == 0)
tty_port_set_initialized(port, 1);
}
+ mutex_unlock(&port->mutex);
return retval;
}
@@ -1660,11 +1679,9 @@
unsigned int cmd, unsigned long arg)
{
struct mxser_port *info = tty->driver_data;
- struct tty_port *port = &info->port;
struct async_icount cnow;
unsigned long flags;
void __user *argp = (void __user *)arg;
- int retval;
if (tty->index == MXSER_PORTS)
return mxser_ioctl_special(cmd, argp);
@@ -1708,20 +1725,10 @@
return 0;
}
- if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && tty_io_error(tty))
+ if (cmd != TIOCMIWAIT && tty_io_error(tty))
return -EIO;
switch (cmd) {
- case TIOCGSERIAL:
- mutex_lock(&port->mutex);
- retval = mxser_get_serial_info(tty, argp);
- mutex_unlock(&port->mutex);
- return retval;
- case TIOCSSERIAL:
- mutex_lock(&port->mutex);
- retval = mxser_set_serial_info(tty, argp);
- mutex_unlock(&port->mutex);
- return retval;
case TIOCSERGETLSR: /* Get line status register */
return mxser_get_lsr_info(info, argp);
/*
@@ -2325,6 +2332,8 @@
.wait_until_sent = mxser_wait_until_sent,
.tiocmget = mxser_tiocmget,
.tiocmset = mxser_tiocmset,
+ .set_serial = mxser_set_serial_info,
+ .get_serial = mxser_get_serial_info,
.get_icount = mxser_get_icount,
};
--
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