[PATCH 04/13 linux-next] serial: mpsc: use container_of to resolve mpsc_port_info from uart_port

From: Fabian Frederick
Date: Sun Oct 05 2014 - 13:06:43 EST


Use container_of instead of casting first structure member.

Signed-off-by: Fabian Frederick <fabf@xxxxxxxxx>
---
drivers/tty/serial/mpsc.c | 39 ++++++++++++++++++++++++++-------------
1 file changed, 26 insertions(+), 13 deletions(-)

diff --git a/drivers/tty/serial/mpsc.c b/drivers/tty/serial/mpsc.c
index ae49856..5d5499b 100644
--- a/drivers/tty/serial/mpsc.c
+++ b/drivers/tty/serial/mpsc.c
@@ -1246,7 +1246,8 @@ static irqreturn_t mpsc_sdma_intr(int irq, void *dev_id)
*/
static uint mpsc_tx_empty(struct uart_port *port)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);
ulong iflags;
uint rc;

@@ -1264,7 +1265,8 @@ static void mpsc_set_mctrl(struct uart_port *port, uint mctrl)

static uint mpsc_get_mctrl(struct uart_port *port)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);
u32 mflags, status;

status = (pi->mirror_regs) ? pi->MPSC_CHR_10_m
@@ -1281,7 +1283,8 @@ static uint mpsc_get_mctrl(struct uart_port *port)

static void mpsc_stop_tx(struct uart_port *port)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);

pr_debug("mpsc_stop_tx[%d]\n", port->line);

@@ -1290,7 +1293,8 @@ static void mpsc_stop_tx(struct uart_port *port)

static void mpsc_start_tx(struct uart_port *port)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);
unsigned long iflags;

spin_lock_irqsave(&pi->tx_lock, iflags);
@@ -1316,7 +1320,8 @@ static void mpsc_start_rx(struct mpsc_port_info *pi)

static void mpsc_stop_rx(struct uart_port *port)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);

pr_debug("mpsc_stop_rx[%d]: Stopping...\n", port->line);

@@ -1338,7 +1343,8 @@ static void mpsc_stop_rx(struct uart_port *port)

static void mpsc_break_ctl(struct uart_port *port, int ctl)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);
ulong flags;
u32 v;

@@ -1353,7 +1359,8 @@ static void mpsc_break_ctl(struct uart_port *port, int ctl)

static int mpsc_startup(struct uart_port *port)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);
u32 flag = 0;
int rc;

@@ -1383,7 +1390,8 @@ static int mpsc_startup(struct uart_port *port)

static void mpsc_shutdown(struct uart_port *port)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);

pr_debug("mpsc_shutdown[%d]: Shutting down MPSC\n", port->line);

@@ -1394,7 +1402,8 @@ static void mpsc_shutdown(struct uart_port *port)
static void mpsc_set_termios(struct uart_port *port, struct ktermios *termios,
struct ktermios *old)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);
u32 baud;
ulong flags;
u32 chr_bits, stop_bits, par;
@@ -1498,7 +1507,8 @@ static int mpsc_request_port(struct uart_port *port)

static void mpsc_release_port(struct uart_port *port)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);

if (pi->ready) {
mpsc_uninit_rings(pi);
@@ -1513,7 +1523,8 @@ static void mpsc_config_port(struct uart_port *port, int flags)

static int mpsc_verify_port(struct uart_port *port, struct serial_struct *ser)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);
int rc = 0;

pr_debug("mpsc_verify_port[%d]: Verifying port data\n", pi->port.line);
@@ -1548,7 +1559,8 @@ static void mpsc_put_poll_char(struct uart_port *port,

static int mpsc_get_poll_char(struct uart_port *port)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);
struct mpsc_rx_desc *rxre;
u32 cmdstat, bytes_in, i;
u8 *bp;
@@ -1648,7 +1660,8 @@ static int mpsc_get_poll_char(struct uart_port *port)
static void mpsc_put_poll_char(struct uart_port *port,
unsigned char c)
{
- struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
+ struct mpsc_port_info *pi =
+ container_of(port, struct mpsc_port_info, port);
u32 data;

data = readl(pi->mpsc_base + MPSC_MPCR);
--
1.9.1

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