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serial: sc16is7xx: use DECLARE_BITMAP for sc16is7xx_lines bitfield

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Replace the explicit sc16is7xx_lines bitfield declaration with the generic
macro DECLARE_BITMAP() to reserve just enough memory to contain all
required bits.

This also improves code self-documentation by showing the maximum number
of bits required.

This conversion now makes sc16is7xx_lines an array, so drop the "&" before
sc16is7xx_lines in all bit access functions.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Link: https://lore.kernel.org/r/20231221231823.2327894-7-hugo@hugovil.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hugo Villeneuve 2023-12-21 18:18:13 -05:00 committed by Greg Kroah-Hartman
parent d5078509c8
commit 3504c3174b
1 changed files with 5 additions and 5 deletions
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10
drivers/tty/serial/sc16is7xx.c
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@ -347,7 +347,7 @@ struct sc16is7xx_port {
struct sc16is7xx_one p[];
};
static unsigned long sc16is7xx_lines;
static DECLARE_BITMAP(sc16is7xx_lines, SC16IS7XX_MAX_DEVS);
static struct uart_driver sc16is7xx_uart = {
.owner = THIS_MODULE,
@ -1536,7 +1536,7 @@ static int sc16is7xx_probe(struct device *dev,
SC16IS7XX_IOCONTROL_SRESET_BIT);
for (i = 0; i < devtype->nr_uart; ++i) {
s->p[i].port.line = find_first_zero_bit(&sc16is7xx_lines,
s->p[i].port.line = find_first_zero_bit(sc16is7xx_lines,
SC16IS7XX_MAX_DEVS);
if (s->p[i].port.line >= SC16IS7XX_MAX_DEVS) {
ret = -ERANGE;
@ -1587,7 +1587,7 @@ static int sc16is7xx_probe(struct device *dev,
if (ret)
goto out_ports;
set_bit(s->p[i].port.line, &sc16is7xx_lines);
set_bit(s->p[i].port.line, sc16is7xx_lines);
/* Enable EFR */
sc16is7xx_port_write(&s->p[i].port, SC16IS7XX_LCR_REG,
@ -1646,7 +1646,7 @@ static int sc16is7xx_probe(struct device *dev,
out_ports:
for (i = 0; i < devtype->nr_uart; i++)
if (test_and_clear_bit(s->p[i].port.line, &sc16is7xx_lines))
if (test_and_clear_bit(s->p[i].port.line, sc16is7xx_lines))
uart_remove_one_port(&sc16is7xx_uart, &s->p[i].port);
kthread_stop(s->kworker_task);
@ -1669,7 +1669,7 @@ static void sc16is7xx_remove(struct device *dev)
for (i = 0; i < s->devtype->nr_uart; i++) {
kthread_cancel_delayed_work_sync(&s->p[i].ms_work);
if (test_and_clear_bit(s->p[i].port.line, &sc16is7xx_lines))
if (test_and_clear_bit(s->p[i].port.line, sc16is7xx_lines))
uart_remove_one_port(&sc16is7xx_uart, &s->p[i].port);
sc16is7xx_power(&s->p[i].port, 0);
}