Revert "serial: clps711x: Give a chance to perform useful tasks during wait loop"
This reverts commit 63e3ad3252
,
since this not works as expected and produce runtime error:
BUG: sleeping function called from invalid context at drivers/tty/serial/clps711x.c:379
in_atomic(): 0, irqs_disabled(): 128, pid: 287, name: mount
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
717f3bbab3
commit
2f310b8e41
|
@ -368,16 +368,12 @@ static const struct uart_ops uart_clps711x_ops = {
|
|||
static void uart_clps711x_console_putchar(struct uart_port *port, int ch)
|
||||
{
|
||||
struct clps711x_port *s = dev_get_drvdata(port->dev);
|
||||
|
||||
/* Wait for FIFO is not full */
|
||||
while (1) {
|
||||
u32 sysflg = 0;
|
||||
|
||||
/* Wait for FIFO is not full */
|
||||
do {
|
||||
regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);
|
||||
if (!(sysflg & SYSFLG_UTXFF))
|
||||
break;
|
||||
cond_resched();
|
||||
}
|
||||
} while (sysflg & SYSFLG_UTXFF);
|
||||
|
||||
writew(ch, port->membase + UARTDR_OFFSET);
|
||||
}
|
||||
|
@ -387,18 +383,14 @@ static void uart_clps711x_console_write(struct console *co, const char *c,
|
|||
{
|
||||
struct uart_port *port = clps711x_uart.state[co->index].uart_port;
|
||||
struct clps711x_port *s = dev_get_drvdata(port->dev);
|
||||
u32 sysflg = 0;
|
||||
|
||||
uart_console_write(port, c, n, uart_clps711x_console_putchar);
|
||||
|
||||
/* Wait for transmitter to become empty */
|
||||
while (1) {
|
||||
u32 sysflg = 0;
|
||||
|
||||
do {
|
||||
regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);
|
||||
if (!(sysflg & SYSFLG_UBUSY))
|
||||
break;
|
||||
cond_resched();
|
||||
}
|
||||
} while (sysflg & SYSFLG_UBUSY);
|
||||
}
|
||||
|
||||
static int uart_clps711x_console_setup(struct console *co, char *options)
|
||||
|
|
Loading…
Reference in New Issue