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TTY: switch tty_flip_buffer_push

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Now, we start converting tty buffer functions to actually use
tty_port. This will allow us to get rid of the need of tty in many
call sites. Only tty_port will needed and hence no more
tty_port_tty_get in those paths.

Now, the one where most of tty_port_tty_get gets removed:
tty_flip_buffer_push.

IOW we also closed all the races in drivers not using tty_port_tty_get
at all yet.

Also we move tty_flip_buffer_push declaration from include/linux/tty.h
to include/linux/tty_flip.h to all others while we are changing it
anyway.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby
2013-01-03 15:53:06 +01:00
committed by Greg Kroah-Hartman
parent d6c53c0e9b
commit 2e124b4a39
146 changed files with 446 additions and 988 deletions
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20
drivers/tty/serial/sunsab.c
View File

@@ -107,22 +107,19 @@ static __inline__ void sunsab_cec_wait(struct uart_sunsab_port *up)
udelay(1);
}
static struct tty_struct *
static struct tty_port *
receive_chars(struct uart_sunsab_port *up,
union sab82532_irq_status *stat)
{
struct tty_port *port = NULL;
struct tty_struct *tty = NULL;
unsigned char buf[32];
int saw_console_brk = 0;
int free_fifo = 0;
int count = 0;
int i;
if (up->port.state != NULL) { /* Unopened serial console */
if (up->port.state != NULL) /* Unopened serial console */
port = &up->port.state->port;
tty = port->tty;
}
/* Read number of BYTES (Character + Status) available. */
if (stat->sreg.isr0 & SAB82532_ISR0_RPF) {
@@ -139,7 +136,7 @@ receive_chars(struct uart_sunsab_port *up,
if (stat->sreg.isr0 & SAB82532_ISR0_TIME) {
sunsab_cec_wait(up);
writeb(SAB82532_CMDR_RFRD, &up->regs->w.cmdr);
return tty;
return port;
}
if (stat->sreg.isr0 & SAB82532_ISR0_RFO)
@@ -219,7 +216,7 @@ receive_chars(struct uart_sunsab_port *up,
if (saw_console_brk)
sun_do_break();
return tty;
return port;
}
static void sunsab_stop_tx(struct uart_port *);
@@ -302,7 +299,7 @@ static void check_status(struct uart_sunsab_port *up,
static irqreturn_t sunsab_interrupt(int irq, void *dev_id)
{
struct uart_sunsab_port *up = dev_id;
struct tty_struct *tty;
struct tty_port *port = NULL;
union sab82532_irq_status status;
unsigned long flags;
unsigned char gis;
@@ -316,12 +313,11 @@ static irqreturn_t sunsab_interrupt(int irq, void *dev_id)
if (gis & 2)
status.sreg.isr1 = readb(&up->regs->r.isr1);
tty = NULL;
if (status.stat) {
if ((status.sreg.isr0 & (SAB82532_ISR0_TCD | SAB82532_ISR0_TIME |
SAB82532_ISR0_RFO | SAB82532_ISR0_RPF)) ||
(status.sreg.isr1 & SAB82532_ISR1_BRK))
tty = receive_chars(up, &status);
port = receive_chars(up, &status);
if ((status.sreg.isr0 & SAB82532_ISR0_CDSC) ||
(status.sreg.isr1 & SAB82532_ISR1_CSC))
check_status(up, &status);
@@ -331,8 +327,8 @@ static irqreturn_t sunsab_interrupt(int irq, void *dev_id)
spin_unlock_irqrestore(&up->port.lock, flags);
if (tty)
tty_flip_buffer_push(tty);
if (port)
tty_flip_buffer_push(port);
return IRQ_HANDLED;
}