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| author | Peter Hurley <peter@hurleysoftware.com> | 2014-09-03 01:39:20 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-09 03:23:36 +0400 |
| commit | 5435d20f506f16352a4e1637b8e8fb7c0d422bb9 (patch) | |
| tree | 032d052256d87cdd279e7ec26be3293b820584a3 /drivers/tty | |
| parent | 8a949b07e4062cbd07e04e6a47249e69ca65b944 (diff) | |
| download | linux-5435d20f506f16352a4e1637b8e8fb7c0d422bb9.tar.xz | |
serial: 8250: Document serial8250_modem_status() locking
Existing callers of serial8250_modem_status() [1] hold the uart port
lock; document.
[1] In-tree callers of serial8250_modem_status()
drivers/tty/serial/8250/8250_fsl.c
fsl8250_handle_irq()
drivers/tty/serial/8250/8250_core.c
serial8250_handle_irq()
serial8250_console_write()
serial8250_get_mctrl() *
* Call graphs for callers of serial8250_get_mctrl() from the function
which acquires the uart port lock
drivers/tty/serial/serial_core.c
uart_port_startup()
uart_tiocmget()
uart_set_termios()
uart_carrier_raised()
ops->get_mctrl() ---> serial8250_get_mctrl()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250_core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 46c1f5fc44d3..b597e730b9e7 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -1463,6 +1463,7 @@ void serial8250_tx_chars(struct uart_8250_port *up) } EXPORT_SYMBOL_GPL(serial8250_tx_chars); +/* Caller holds uart port lock */ unsigned int serial8250_modem_status(struct uart_8250_port *up) { struct uart_port *port = &up->port; |