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serial: 8250: introduce up_to_u8250p() helper 

It helps to cast struct uart_port to struct uart_8250_port at runtime.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2014-07-14 14:26:14 +03:00 коммит произвёл Greg Kroah-Hartman
Родитель 380c966c09
Коммит b1261c86fe
5 изменённых файлов: 32 добавлений и 47 удалений
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57
drivers/tty/serial/8250/8250_core.c
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@ -439,8 +439,7 @@ static int exar_handle_irq(struct uart_port *port);
static void set_io_from_upio(struct uart_port *p)
{
struct uart_8250_port *up =
container_of(p, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(p);
up->dl_read = default_serial_dl_read;
up->dl_write = default_serial_dl_write;
@ -1277,8 +1276,7 @@ static inline void __stop_tx(struct uart_8250_port *p)
static void serial8250_stop_tx(struct uart_port *port)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
__stop_tx(up);
@ -1293,8 +1291,7 @@ static void serial8250_stop_tx(struct uart_port *port)
static void serial8250_start_tx(struct uart_port *port)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
if (up->dma && !serial8250_tx_dma(up)) {
return;
@ -1322,8 +1319,7 @@ static void serial8250_start_tx(struct uart_port *port)
static void serial8250_stop_rx(struct uart_port *port)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
up->ier &= ~UART_IER_RLSI;
up->port.read_status_mask &= ~UART_LSR_DR;
@ -1332,8 +1328,7 @@ static void serial8250_stop_rx(struct uart_port *port)
static void serial8250_enable_ms(struct uart_port *port)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
/* no MSR capabilities */
if (up->bugs & UART_BUG_NOMSR)
@ -1499,8 +1494,7 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
{
unsigned char status;
unsigned long flags;
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
int dma_err = 0;
if (iir & UART_IIR_NO_INT)
@ -1785,8 +1779,7 @@ static void serial8250_backup_timeout(unsigned long data)
static unsigned int serial8250_tx_empty(struct uart_port *port)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
unsigned long flags;
unsigned int lsr;
@ -1800,8 +1793,7 @@ static unsigned int serial8250_tx_empty(struct uart_port *port)
static unsigned int serial8250_get_mctrl(struct uart_port *port)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
unsigned int status;
unsigned int ret;
@ -1821,8 +1813,7 @@ static unsigned int serial8250_get_mctrl(struct uart_port *port)
static void serial8250_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
unsigned char mcr = 0;
if (mctrl & TIOCM_RTS)
@ -1843,8 +1834,7 @@ static void serial8250_set_mctrl(struct uart_port *port, unsigned int mctrl)
static void serial8250_break_ctl(struct uart_port *port, int break_state)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
unsigned long flags;
spin_lock_irqsave(&port->lock, flags);
@ -1911,8 +1901,7 @@ static void serial8250_put_poll_char(struct uart_port *port,
unsigned char c)
{
unsigned int ier;
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
/*
* First save the IER then disable the interrupts
@ -1941,8 +1930,7 @@ static void serial8250_put_poll_char(struct uart_port *port,
static int serial8250_startup(struct uart_port *port)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
unsigned long flags;
unsigned char lsr, iir;
int retval;
@ -2194,8 +2182,7 @@ dont_test_tx_en:
static void serial8250_shutdown(struct uart_port *port)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
unsigned long flags;
/*
@ -2268,8 +2255,7 @@ void
serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
struct ktermios *old)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
unsigned char cval, fcr = 0;
unsigned long flags;
unsigned int baud, quot;
@ -2498,8 +2484,7 @@ serial8250_set_ldisc(struct uart_port *port, int new)
void serial8250_do_pm(struct uart_port *port, unsigned int state,
unsigned int oldstate)
{
struct uart_8250_port *p =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *p = up_to_u8250p(port);
serial8250_set_sleep(p, state != 0);
}
@ -2630,8 +2615,7 @@ static void serial8250_release_rsa_resource(struct uart_8250_port *up)
static void serial8250_release_port(struct uart_port *port)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
serial8250_release_std_resource(up);
if (port->type == PORT_RSA)
@ -2640,8 +2624,7 @@ static void serial8250_release_port(struct uart_port *port)
static int serial8250_request_port(struct uart_port *port)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
int ret;
if (port->type == PORT_8250_CIR)
@ -2659,8 +2642,7 @@ static int serial8250_request_port(struct uart_port *port)
static void serial8250_config_port(struct uart_port *port, int flags)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
int probeflags = PROBE_ANY;
int ret;
@ -2859,8 +2841,7 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev)
static void serial8250_console_putchar(struct uart_port *port, int ch)
{
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
wait_for_xmitr(up, UART_LSR_THRE);
serial_port_out(port, UART_TX, ch);

8
drivers/tty/serial/8250/8250_dw.c
Просмотреть файл

@ -84,8 +84,9 @@ static inline int dw8250_modify_msr(struct uart_port *p, int offset, int value)
static void dw8250_force_idle(struct uart_port *p)
{
serial8250_clear_and_reinit_fifos(container_of
(p, struct uart_8250_port, port));
struct uart_8250_port *up = up_to_u8250p(p);
serial8250_clear_and_reinit_fifos(up);
(void)p->serial_in(p, UART_RX);
}
@ -255,6 +256,7 @@ static int dw8250_probe_of(struct uart_port *p,
struct dw8250_data *data)
{
struct device_node *np = p->dev->of_node;
struct uart_8250_port *up = up_to_u8250p(p);
u32 val;
bool has_ucv = true;
@ -287,7 +289,7 @@ static int dw8250_probe_of(struct uart_port *p,
}
}
if (has_ucv)
dw8250_setup_port(container_of(p, struct uart_8250_port, port));
dw8250_setup_port(up);
if (!of_property_read_u32(np, "reg-shift", &val))
p->regshift = val;

3
drivers/tty/serial/8250/8250_fsl.c
Просмотреть файл

@ -28,8 +28,7 @@ int fsl8250_handle_irq(struct uart_port *port)
unsigned char lsr, orig_lsr;
unsigned long flags;
unsigned int iir;
struct uart_8250_port *up =
container_of(port, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(port);
spin_lock_irqsave(&up->port.lock, flags);

6
drivers/tty/serial/8250/8250_pci.c
Просмотреть файл

@ -1581,8 +1581,7 @@ static int skip_tx_en_setup(struct serial_private *priv,
static void kt_handle_break(struct uart_port *p)
{
struct uart_8250_port *up =
container_of(p, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(p);
/*
* On receipt of a BI, serial device in Intel ME (Intel
* management engine) needs to have its fifos cleared for sane
@ -1593,8 +1592,7 @@ static void kt_handle_break(struct uart_port *p)
static unsigned int kt_serial_in(struct uart_port *p, int offset)
{
struct uart_8250_port *up =
container_of(p, struct uart_8250_port, port);
struct uart_8250_port *up = up_to_u8250p(p);
unsigned int val;
/*

5
include/linux/serial_8250.h
Просмотреть файл

@ -100,6 +100,11 @@ struct uart_8250_port {
void (*dl_write)(struct uart_8250_port *, int);
};
static inline struct uart_8250_port *up_to_u8250p(struct uart_port *up)
{
return container_of(up, struct uart_8250_port, port);
}
int serial8250_register_8250_port(struct uart_8250_port *);
void serial8250_unregister_port(int line);
void serial8250_suspend_port(int line);