usb-serial: possible irq lock inversion (PPP vs. usb/serial)

=========================================================
[ INFO: possible irq lock inversion dependency detected ]

diff --git a/drivers/usb/serial/cyberjack.c b/drivers/usb/serial/cyberjack.c
index 6286aba..d954ec3 100644 (file)
--- a/drivers/usb/serial/cyberjack.c
+++ b/drivers/usb/serial/cyberjack.c
@@ -214,14 +214,14 @@ static int cyberjack_write (struct usb_serial_port *port, const unsigned char *b
                return (0);
        }
 
-       spin_lock(&port->lock);
+       spin_lock_bh(&port->lock);
        if (port->write_urb_busy) {
-               spin_unlock(&port->lock);
+               spin_unlock_bh(&port->lock);
                dbg("%s - already writing", __FUNCTION__);
                return 0;
        }
        port->write_urb_busy = 1;
-       spin_unlock(&port->lock);
+       spin_unlock_bh(&port->lock);
 
        spin_lock_irqsave(&priv->lock, flags);
 

diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index 1727135..21cbaa0 100644 (file)
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -175,14 +175,14 @@ int usb_serial_generic_write(struct usb_serial_port *port, const unsigned char *
 
        /* only do something if we have a bulk out endpoint */
        if (serial->num_bulk_out) {
-               spin_lock(&port->lock);
+               spin_lock_bh(&port->lock);
                if (port->write_urb_busy) {
-                       spin_unlock(&port->lock);
+                       spin_unlock_bh(&port->lock);
                        dbg("%s - already writing", __FUNCTION__);
                        return 0;
                }
                port->write_urb_busy = 1;
-               spin_unlock(&port->lock);
+               spin_unlock_bh(&port->lock);
 
                count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
 

diff --git a/drivers/usb/serial/ipw.c b/drivers/usb/serial/ipw.c
index 87306cb..812bc21 100644 (file)
--- a/drivers/usb/serial/ipw.c
+++ b/drivers/usb/serial/ipw.c
@@ -394,14 +394,14 @@ static int ipw_write(struct usb_serial_port *port, const unsigned char *buf, int
                return 0;
        }
 
-       spin_lock(&port->lock);
+       spin_lock_bh(&port->lock);
        if (port->write_urb_busy) {
-               spin_unlock(&port->lock);
+               spin_unlock_bh(&port->lock);
                dbg("%s - already writing", __FUNCTION__);
                return 0;
        }
        port->write_urb_busy = 1;
-       spin_unlock(&port->lock);
+       spin_unlock_bh(&port->lock);
 
        count = min(count, port->bulk_out_size);
        memcpy(port->bulk_out_buffer, buf, count);

diff --git a/drivers/usb/serial/ir-usb.c b/drivers/usb/serial/ir-usb.c
index 1738b0b..1b348df 100644 (file)
--- a/drivers/usb/serial/ir-usb.c
+++ b/drivers/usb/serial/ir-usb.c
@@ -342,14 +342,14 @@ static int ir_write (struct usb_serial_port *port, const unsigned char *buf, int
        if (count == 0)
                return 0;
 
-       spin_lock(&port->lock);
+       spin_lock_bh(&port->lock);
        if (port->write_urb_busy) {
-               spin_unlock(&port->lock);
+               spin_unlock_bh(&port->lock);
                dbg("%s - already writing", __FUNCTION__);
                return 0;
        }
        port->write_urb_busy = 1;
-       spin_unlock(&port->lock);
+       spin_unlock_bh(&port->lock);
 
        transfer_buffer = port->write_urb->transfer_buffer;
        transfer_size = min(count, port->bulk_out_size - 1);

diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c
index 49b8dc0..59e777f 100644 (file)
--- a/drivers/usb/serial/keyspan_pda.c
+++ b/drivers/usb/serial/keyspan_pda.c
@@ -518,13 +518,13 @@ static int keyspan_pda_write(struct usb_serial_port *port,
           the TX urb is in-flight (wait until it completes)
           the device is full (wait until it says there is room)
        */
-       spin_lock(&port->lock);
+       spin_lock_bh(&port->lock);
        if (port->write_urb_busy || priv->tx_throttled) {
-               spin_unlock(&port->lock);
+               spin_unlock_bh(&port->lock);
                return 0;
        }
        port->write_urb_busy = 1;
-       spin_unlock(&port->lock);
+       spin_unlock_bh(&port->lock);
 
        /* At this point the URB is in our control, nobody else can submit it
           again (the only sudden transition was the one from EINPROGRESS to

diff --git a/drivers/usb/serial/omninet.c b/drivers/usb/serial/omninet.c
index e49f409..a764ff4 100644 (file)
--- a/drivers/usb/serial/omninet.c
+++ b/drivers/usb/serial/omninet.c
@@ -256,14 +256,14 @@ static int omninet_write (struct usb_serial_port *port, const unsigned char *buf
                return (0);
        }
 
-       spin_lock(&wport->lock);
+       spin_lock_bh(&wport->lock);
        if (wport->write_urb_busy) {
-               spin_unlock(&wport->lock);
+               spin_unlock_bh(&wport->lock);
                dbg("%s - already writing", __FUNCTION__);
                return 0;
        }
        wport->write_urb_busy = 1;
-       spin_unlock(&wport->lock);
+       spin_unlock_bh(&wport->lock);
 
        count = (count > OMNINET_BULKOUTSIZE) ? OMNINET_BULKOUTSIZE : count;
 

diff --git a/drivers/usb/serial/safe_serial.c b/drivers/usb/serial/safe_serial.c
index 789771e..1e07dfa 100644 (file)
--- a/drivers/usb/serial/safe_serial.c
+++ b/drivers/usb/serial/safe_serial.c
@@ -298,14 +298,14 @@ static int safe_write (struct usb_serial_port *port, const unsigned char *buf, i
                dbg ("%s - write request of 0 bytes", __FUNCTION__);
                return (0);
        }
-       spin_lock(&port->lock);
+       spin_lock_bh(&port->lock);
        if (port->write_urb_busy) {
-               spin_unlock(&port->lock);
+               spin_unlock_bh(&port->lock);
                dbg("%s - already writing", __FUNCTION__);
                return 0;
        }
        port->write_urb_busy = 1;
-       spin_unlock(&port->lock);
+       spin_unlock_bh(&port->lock);
 
        packet_length = port->bulk_out_size;    // get max packetsize