Commit da9a5aa3 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Greg Kroah-Hartman

serial: core: Refactor uart_unlock_and_check_sysrq()

Refactor uart_unlock_and_check_sysrq() to:

  - explicitly show that we release a port lock which makes
    static analyzers happy:

CHECK   drivers/tty/serial/serial_core.c
.../serial_core.c:3290:17: warning: context imbalance in 'uart_unlock_and_check_sysrq' - unexpected unlock

  - use flags instead of irqflags to avoid confusion with IRQ flags

  - provide one return point

  - be more compact
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: default avatarDmitry Safonov <0x7f454c46@gmail.com>
Link: https://lore.kernel.org/r/20200310174337.74109-4-andriy.shevchenko@linux.intel.comSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e140ef36
......@@ -3187,22 +3187,19 @@ int uart_prepare_sysrq_char(struct uart_port *port, unsigned int ch)
}
EXPORT_SYMBOL_GPL(uart_prepare_sysrq_char);
void uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long irqflags)
void uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long flags)
__releases(&port->lock)
{
int sysrq_ch;
if (port->has_sysrq) {
int sysrq_ch = port->sysrq_ch;
if (!port->has_sysrq) {
spin_unlock_irqrestore(&port->lock, irqflags);
return;
}
sysrq_ch = port->sysrq_ch;
port->sysrq_ch = 0;
spin_unlock_irqrestore(&port->lock, irqflags);
spin_unlock_irqrestore(&port->lock, flags);
if (sysrq_ch)
handle_sysrq(sysrq_ch);
} else {
spin_unlock_irqrestore(&port->lock, flags);
}
}
EXPORT_SYMBOL_GPL(uart_unlock_and_check_sysrq);
......
......@@ -462,8 +462,7 @@ extern void uart_insert_char(struct uart_port *port, unsigned int status,
extern int uart_handle_sysrq_char(struct uart_port *port, unsigned int ch);
extern int uart_prepare_sysrq_char(struct uart_port *port, unsigned int ch);
extern void uart_unlock_and_check_sysrq(struct uart_port *port,
unsigned long irqflags);
extern void uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long flags);
extern int uart_handle_break(struct uart_port *port);
/*
......
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