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authorOliver Neukum <oliver@neukum.org>2008-01-23 12:28:45 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2008-02-01 14:35:05 -0800
commit0915f490d81c1a5098b399ec6c0be45bd421ee1d (patch)
tree840285ec52dba9ae65757b27c68ee3933c041ff3
parent3edbc986509888fa9977cc180c1fe458d2f89076 (diff)
USB: last abuses of intfdata in close for usb-serial drivers
these drivers abused intfdata in close() as flags for binding. That races with reprobing of those devices. This patch fixes that by using the flag and the locks introduced with the patch against mos7720. Signed-off-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/usb/serial/digi_acceleport.c13
-rw-r--r--drivers/usb/serial/oti6858.c2
-rw-r--r--drivers/usb/serial/pl2303.c2
-rw-r--r--drivers/usb/serial/ti_usb_3410_5052.c17
4 files changed, 19 insertions, 15 deletions
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index ae410c4678e..5f9c6e46bee 100644
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -1405,19 +1405,19 @@ static void digi_close(struct usb_serial_port *port, struct file *filp)
unsigned char buf[32];
struct tty_struct *tty = port->tty;
struct digi_port *priv = usb_get_serial_port_data(port);
- unsigned long flags = 0;
dbg("digi_close: TOP: port=%d, open_count=%d",
priv->dp_port_num, port->open_count);
+ mutex_lock(&port->serial->disc_mutex);
/* if disconnected, just clear flags */
- if (!usb_get_intfdata(port->serial->interface))
+ if (port->serial->disconnected)
goto exit;
/* do cleanup only after final close on this port */
- spin_lock_irqsave(&priv->dp_port_lock, flags);
+ spin_lock_irq(&priv->dp_port_lock);
priv->dp_in_close = 1;
- spin_unlock_irqrestore(&priv->dp_port_lock, flags);
+ spin_unlock_irq(&priv->dp_port_lock);
/* tell line discipline to process only XON/XOFF */
tty->closing = 1;
@@ -1482,11 +1482,12 @@ static void digi_close(struct usb_serial_port *port, struct file *filp)
}
tty->closing = 0;
exit:
- spin_lock_irqsave(&priv->dp_port_lock, flags);
+ spin_lock_irq(&priv->dp_port_lock);
priv->dp_write_urb_in_use = 0;
priv->dp_in_close = 0;
wake_up_interruptible(&priv->dp_close_wait);
- spin_unlock_irqrestore(&priv->dp_port_lock, flags);
+ spin_unlock_irq(&priv->dp_port_lock);
+ mutex_unlock(&port->serial->disc_mutex);
dbg("digi_close: done");
}
diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c
index db725aaf7d1..a3847d6c946 100644
--- a/drivers/usb/serial/oti6858.c
+++ b/drivers/usb/serial/oti6858.c
@@ -649,7 +649,7 @@ static void oti6858_close(struct usb_serial_port *port, struct file *filp)
set_current_state(TASK_INTERRUPTIBLE);
if (oti6858_buf_data_avail(priv->buf) == 0
|| timeout == 0 || signal_pending(current)
- || !usb_get_intfdata(port->serial->interface)) /* disconnect */
+ || port->serial->disconnected)
break;
spin_unlock_irqrestore(&priv->lock, flags);
timeout = schedule_timeout(timeout);
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index ac3d8765f48..ae3ec1a6400 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -667,7 +667,7 @@ static void pl2303_close(struct usb_serial_port *port, struct file *filp)
set_current_state(TASK_INTERRUPTIBLE);
if (pl2303_buf_data_avail(priv->buf) == 0 ||
timeout == 0 || signal_pending(current) ||
- !usb_get_intfdata(port->serial->interface)) /* disconnect */
+ port->serial->disconnected)
break;
spin_unlock_irqrestore(&priv->lock, flags);
timeout = schedule_timeout(timeout);
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index 70f56c8aef9..b517f93352e 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -1493,11 +1493,10 @@ static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
struct ti_device *tdev = tport->tp_tdev;
struct usb_serial_port *port = tport->tp_port;
wait_queue_t wait;
- unsigned long flags;
dbg("%s - port %d", __FUNCTION__, port->number);
- spin_lock_irqsave(&tport->tp_lock, flags);
+ spin_lock_irq(&tport->tp_lock);
/* wait for data to drain from the buffer */
tdev->td_urb_error = 0;
@@ -1508,11 +1507,11 @@ static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
if (ti_buf_data_avail(tport->tp_write_buf) == 0
|| timeout == 0 || signal_pending(current)
|| tdev->td_urb_error
- || !usb_get_intfdata(port->serial->interface)) /* disconnect */
+ || port->serial->disconnected) /* disconnect */
break;
- spin_unlock_irqrestore(&tport->tp_lock, flags);
+ spin_unlock_irq(&tport->tp_lock);
timeout = schedule_timeout(timeout);
- spin_lock_irqsave(&tport->tp_lock, flags);
+ spin_lock_irq(&tport->tp_lock);
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&tport->tp_write_wait, &wait);
@@ -1521,19 +1520,23 @@ static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
if (flush)
ti_buf_clear(tport->tp_write_buf);
- spin_unlock_irqrestore(&tport->tp_lock, flags);
+ spin_unlock_irq(&tport->tp_lock);
+ mutex_lock(&port->serial->disc_mutex);
/* wait for data to drain from the device */
/* wait for empty tx register, plus 20 ms */
timeout += jiffies;
tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
&& !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
- && usb_get_intfdata(port->serial->interface)) { /* not disconnected */
+ && !port->serial->disconnected) {
if (ti_get_lsr(tport))
break;
+ mutex_unlock(&port->serial->disc_mutex);
msleep_interruptible(20);
+ mutex_lock(&port->serial->disc_mutex);
}
+ mutex_unlock(&port->serial->disc_mutex);
}