diff options
Diffstat (limited to 'drivers/usb/serial/io_ti.c')
| -rw-r--r-- | drivers/usb/serial/io_ti.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c index 63e044adc19a..39d71fdb5071 100644 --- a/drivers/usb/serial/io_ti.c +++ b/drivers/usb/serial/io_ti.c @@ -2559,9 +2559,11 @@ static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsig { struct edgeport_port *edge_port = usb_get_serial_port_data(port); unsigned int mcr; + unsigned long flags; dbg("%s - port %d", __FUNCTION__, port->number); + spin_lock_irqsave(&edge_port->ep_lock, flags); mcr = edge_port->shadow_mcr; if (set & TIOCM_RTS) mcr |= MCR_RTS; @@ -2578,6 +2580,7 @@ static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsig mcr &= ~MCR_LOOPBACK; edge_port->shadow_mcr = mcr; + spin_unlock_irqrestore(&edge_port->ep_lock, flags); TIRestoreMCR (edge_port, mcr); @@ -2590,9 +2593,12 @@ static int edge_tiocmget(struct usb_serial_port *port, struct file *file) unsigned int result = 0; unsigned int msr; unsigned int mcr; + unsigned long flags; dbg("%s - port %d", __FUNCTION__, port->number); + spin_lock_irqsave(&edge_port->ep_lock, flags); + msr = edge_port->shadow_msr; mcr = edge_port->shadow_mcr; result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ @@ -2604,6 +2610,7 @@ static int edge_tiocmget(struct usb_serial_port *port, struct file *file) dbg("%s -- %x", __FUNCTION__, result); + spin_unlock_irqrestore(&edge_port->ep_lock, flags); return result; } |