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| author | Peter Hurley <peter@hurleysoftware.com> | 2014-11-05 13:11:44 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-06 14:57:27 -0800 |
| commit | d41510ce2f071c9ccb1903d7a5135443a57dbe4e (patch) | |
| tree | 95982bb680036f763edb530bce025f77b0d344f8 /drivers | |
| parent | 732a84a037a4de29b54e0b4e6cb6f9b3813e29e5 (diff) | |
| download | linux-stable-d41510ce2f071c9ccb1903d7a5135443a57dbe4e.tar.gz linux-stable-d41510ce2f071c9ccb1903d7a5135443a57dbe4e.tar.bz2 linux-stable-d41510ce2f071c9ccb1903d7a5135443a57dbe4e.zip | |
serial: Take uart port lock for direct *_enable_ms()
Three UART drivers (8250, atmel & amba-pl010) directly call their
enable_ms() method; the uart port lock must be acquired before
any h/w programming.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/8250/8250_core.c | 2 | ||||
| -rw-r--r-- | drivers/tty/serial/amba-pl010.c | 2 | ||||
| -rw-r--r-- | drivers/tty/serial/atmel_serial.c | 2 |
3 files changed, 6 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 116b5a75f1af..f0f35e782bc3 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -2613,7 +2613,9 @@ serial8250_set_ldisc(struct uart_port *port, struct ktermios *termios) { if (termios->c_line == N_PPS) { port->flags |= UPF_HARDPPS_CD; + spin_lock_irq(&port->lock); serial8250_enable_ms(port); + spin_unlock_irq(&port->lock); } else port->flags &= ~UPF_HARDPPS_CD; } diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c index 230bc7a290d5..194108b0de84 100644 --- a/drivers/tty/serial/amba-pl010.c +++ b/drivers/tty/serial/amba-pl010.c @@ -483,7 +483,9 @@ static void pl010_set_ldisc(struct uart_port *port, struct ktermios *termios) { if (termios->c_line == N_PPS) { port->flags |= UPF_HARDPPS_CD; + spin_lock_irq(&port->lock); pl010_enable_ms(port); + spin_unlock_irq(&port->lock); } else port->flags &= ~UPF_HARDPPS_CD; } diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index 6a1d960e2e82..e67cb3831280 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -2060,7 +2060,9 @@ static void atmel_set_ldisc(struct uart_port *port, struct ktermios *termios) { if (termios->c_line == N_PPS) { port->flags |= UPF_HARDPPS_CD; + spin_lock_irq(&port->lock); atmel_enable_ms(port); + spin_unlock_irq(&port->lock); } else { port->flags &= ~UPF_HARDPPS_CD; } |