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USB: serial: mos7840: drop port driver data accessors 

Drop the custom port driver data accessors and paranoid sanity checks.
The driver data is not cleared until the driver is unbound.

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold 2019-11-07 14:29:02 +01:00
parent 2d52f0763f
commit 7b2faede67
1 changed files with 13 additions and 91 deletions
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104
drivers/usb/serial/mos7840.c
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@ -344,26 +344,6 @@ static void mos7840_dump_serial_port(struct usb_serial_port *port,
}
/************************************************************************/
/************************************************************************/
/* I N T E R F A C E F U N C T I O N S */
/* I N T E R F A C E F U N C T I O N S */
/************************************************************************/
/************************************************************************/
static inline void mos7840_set_port_private(struct usb_serial_port *port,
struct moschip_port *data)
{
usb_set_serial_port_data(port, (void *)data);
}
static inline struct moschip_port *mos7840_get_port_private(struct
usb_serial_port
*port)
{
return (struct moschip_port *)usb_get_serial_port_data(port);
}
/************************************************************************/
/************************************************************************/
/* U S B C A L L B A C K F U N C T I O N S */
@ -541,17 +521,13 @@ static void mos7840_bulk_out_data_callback(struct urb *urb)
static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
{
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
struct usb_serial *serial = port->serial;
int response;
int j;
struct urb *urb;
__u16 Data;
int status;
struct moschip_port *mos7840_port;
mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL)
return -ENODEV;
usb_clear_halt(serial->dev, port->write_urb->pipe);
usb_clear_halt(serial->dev, port->read_urb->pipe);
@ -773,14 +749,10 @@ static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
static int mos7840_chars_in_buffer(struct tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
int i;
int chars = 0;
unsigned long flags;
struct moschip_port *mos7840_port;
mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL)
return 0;
spin_lock_irqsave(&mos7840_port->pool_lock, flags);
for (i = 0; i < NUM_URBS; ++i) {
@ -802,14 +774,10 @@ static int mos7840_chars_in_buffer(struct tty_struct *tty)
static void mos7840_close(struct usb_serial_port *port)
{
struct moschip_port *mos7840_port;
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
int j;
__u16 Data;
mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL)
return;
for (j = 0; j < NUM_URBS; ++j)
usb_kill_urb(mos7840_port->write_urb_pool[j]);
@ -840,13 +808,8 @@ static void mos7840_close(struct usb_serial_port *port)
static void mos7840_break(struct tty_struct *tty, int break_state)
{
struct usb_serial_port *port = tty->driver_data;
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
unsigned char data;
struct moschip_port *mos7840_port;
mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL)
return;
if (break_state == -1)
data = mos7840_port->shadowLCR | LCR_SET_BREAK;
@ -871,14 +834,10 @@ static void mos7840_break(struct tty_struct *tty, int break_state)
static int mos7840_write_room(struct tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
int i;
int room = 0;
unsigned long flags;
struct moschip_port *mos7840_port;
mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL)
return -1;
spin_lock_irqsave(&mos7840_port->pool_lock, flags);
for (i = 0; i < NUM_URBS; ++i) {
@ -904,22 +863,17 @@ static int mos7840_write_room(struct tty_struct *tty)
static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
const unsigned char *data, int count)
{
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
struct usb_serial *serial = port->serial;
int status;
int i;
int bytes_sent = 0;
int transfer_size;
unsigned long flags;
struct moschip_port *mos7840_port;
struct urb *urb;
/* __u16 Data; */
const unsigned char *current_position = data;
mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL)
return -1;
/* try to find a free urb in the list */
urb = NULL;
@ -1000,14 +954,9 @@ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
static void mos7840_throttle(struct tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
struct moschip_port *mos7840_port;
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
int status;
mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL)
return;
if (!mos7840_port->open) {
dev_dbg(&port->dev, "%s", "port not opened\n");
return;
@ -1039,11 +988,8 @@ static void mos7840_throttle(struct tty_struct *tty)
static void mos7840_unthrottle(struct tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
int status;
struct moschip_port *mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL)
return;
if (!mos7840_port->open) {
dev_dbg(&port->dev, "%s - port not opened\n", __func__);
@ -1071,15 +1017,10 @@ static void mos7840_unthrottle(struct tty_struct *tty)
static int mos7840_tiocmget(struct tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
struct moschip_port *mos7840_port;
unsigned int result;
__u16 msr;
__u16 mcr;
int status;
mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL)
return -ENODEV;
status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
if (status < 0)
@ -1104,15 +1045,10 @@ static int mos7840_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear)
{
struct usb_serial_port *port = tty->driver_data;
struct moschip_port *mos7840_port;
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
unsigned int mcr;
int status;
mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL)
return -ENODEV;
/* FIXME: What locks the port registers ? */
mcr = mos7840_port->shadowMCR;
if (clear & TIOCM_RTS)
@ -1429,13 +1365,8 @@ static void mos7840_set_termios(struct tty_struct *tty,
struct usb_serial_port *port,
struct ktermios *old_termios)
{
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
int status;
struct moschip_port *mos7840_port;
mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL)
return;
if (!mos7840_port->open) {
dev_dbg(&port->dev, "%s - port not opened\n", __func__);
@ -1497,7 +1428,7 @@ static int mos7840_get_serial_info(struct tty_struct *tty,
struct serial_struct *ss)
{
struct usb_serial_port *port = tty->driver_data;
struct moschip_port *mos7840_port = mos7840_get_port_private(port);
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
ss->type = PORT_16550A;
ss->line = mos7840_port->port->minor;
@ -1520,12 +1451,6 @@ static int mos7840_ioctl(struct tty_struct *tty,
{
struct usb_serial_port *port = tty->driver_data;
void __user *argp = (void __user *)arg;
struct moschip_port *mos7840_port;
mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL)
return -1;
switch (cmd) {
/* return number of bytes available */
@ -1692,7 +1617,6 @@ static int mos7840_port_probe(struct usb_serial_port *port)
* common to all port */
mos7840_port->port = port;
mos7840_set_port_private(port, mos7840_port);
spin_lock_init(&mos7840_port->pool_lock);
/* minor is not initialised until later by
@ -1718,7 +1642,7 @@ static int mos7840_port_probe(struct usb_serial_port *port)
mos7840_port->DcrRegOffset = 0x16 + 3 * (phy_num - 2);
}
mos7840_dump_serial_port(port, mos7840_port);
mos7840_set_port_private(port, mos7840_port);
usb_set_serial_port_data(port, mos7840_port);
/* enable rx_disable bit in control register */
status = mos7840_get_reg_sync(port,
@ -1859,9 +1783,7 @@ static int mos7840_port_probe(struct usb_serial_port *port)
static int mos7840_port_remove(struct usb_serial_port *port)
{
struct moschip_port *mos7840_port;
mos7840_port = mos7840_get_port_private(port);
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
if (mos7840_port->has_led) {
/* Turn off LED */