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Commit 3d71fe0b authored by Alan Cox's avatar Alan Cox Committed by Greg Kroah-Hartman
Browse files

USB: io_ti: lock mcr and msr shadows properly 



Signed-off-by: default avatarAlan Cox <alan@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 04ca89d4

drivers/usb/serial/io_ti.c

+7 −0
Original line number Original line Diff line number Diff line
@@ -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);

	struct edgeport_port *edge_port = usb_get_serial_port_data(port);

	unsigned int mcr;

	unsigned int mcr;

	unsigned long flags;





	dbg("%s - port %d", __FUNCTION__, port->number);

	dbg("%s - port %d", __FUNCTION__, port->number);





	spin_lock_irqsave(&edge_port->ep_lock, flags);

	mcr = edge_port->shadow_mcr;

	mcr = edge_port->shadow_mcr;

	if (set & TIOCM_RTS)

	if (set & TIOCM_RTS)

		mcr |= MCR_RTS;

		mcr |= MCR_RTS;
@@ -2578,6 +2580,7 @@ static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsig 
		mcr &= ~MCR_LOOPBACK;

		mcr &= ~MCR_LOOPBACK;





	edge_port->shadow_mcr = mcr;

	edge_port->shadow_mcr = mcr;

	spin_unlock_irqrestore(&edge_port->ep_lock, flags);





	TIRestoreMCR (edge_port, mcr);

	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 result = 0;

	unsigned int msr;

	unsigned int msr;

	unsigned int mcr;

	unsigned int mcr;

	unsigned long flags;





	dbg("%s - port %d", __FUNCTION__, port->number);

	dbg("%s - port %d", __FUNCTION__, port->number);





	spin_lock_irqsave(&edge_port->ep_lock, flags);



	msr = edge_port->shadow_msr;

	msr = edge_port->shadow_msr;

	mcr = edge_port->shadow_mcr;

	mcr = edge_port->shadow_mcr;

	result = ((mcr & MCR_DTR)	? TIOCM_DTR: 0)	  /* 0x002 */

	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);

	dbg("%s -- %x", __FUNCTION__, result);

	spin_unlock_irqrestore(&edge_port->ep_lock, flags);





	return result;

	return result;

}

}