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serial: 8250_platform: Explicitly show we initialise ISA ports only once

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serial8250_isa_init_ports() uses home grown approach to make itself
a singleton. Instead, explicitly show that we initialise ISA ports
once by providing a helper function which calls the original function
via DO_ONCE() macro.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240606184841.3102545-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2024-06-06 21:48:41 +03:00 committed by Greg Kroah-Hartman
parent f0a17485cc
commit efa6b0a1d6
1 changed files with 7 additions and 6 deletions
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13
drivers/tty/serial/8250/8250_platform.c
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@ -9,6 +9,7 @@
#include <linux/array_size.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/once.h>
#include <linux/platform_device.h>
#include <linux/serial_8250.h>
@ -53,15 +54,10 @@ void serial8250_set_isa_configurator(serial8250_isa_config_fn v)
}
EXPORT_SYMBOL(serial8250_set_isa_configurator);
void __init serial8250_isa_init_ports(void)
static void __init __serial8250_isa_init_ports(void)
{
static int first = 1;
int i, irqflag = 0;
if (!first)
return;
first = 0;
if (nr_uarts > UART_NR)
nr_uarts = UART_NR;
@ -102,6 +98,11 @@ void __init serial8250_isa_init_ports(void)
}
}
void __init serial8250_isa_init_ports(void)
{
DO_ONCE(__serial8250_isa_init_ports);
}
/*
* Register a set of serial devices attached to a platform device. The
* list is terminated with a zero flags entry, which means we expect