diff options
| author | Johan Hovold <jhovold@gmail.com> | 2011-11-06 19:06:24 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-11-15 10:33:12 -0800 |
| commit | da280e3488660042a1659cb756ae6ab0bf6f8f5f (patch) | |
| tree | 03f3bde6ff88c3a5969bf11e29f397d47e82169a /drivers/usb/serial/keyspan_pda.c | |
| parent | c1cac10c175f4b01b6722d246d80dd6c9975f0c1 (diff) | |
| download | talos-obmc-linux-da280e3488660042a1659cb756ae6ab0bf6f8f5f.tar.gz talos-obmc-linux-da280e3488660042a1659cb756ae6ab0bf6f8f5f.zip | |
USB: keyspan_pda: clean up write-urb busy handling
Use port write_urbs_free mask rather than write_urb_busy field in struct
serial_port.
Compile-only tested.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial/keyspan_pda.c')
| -rw-r--r-- | drivers/usb/serial/keyspan_pda.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c index fde553785d2b..9428cc0cfb12 100644 --- a/drivers/usb/serial/keyspan_pda.c +++ b/drivers/usb/serial/keyspan_pda.c @@ -479,11 +479,11 @@ static int keyspan_pda_write(struct tty_struct *tty, the device is full (wait until it says there is room) */ spin_lock_bh(&port->lock); - if (port->write_urb_busy || priv->tx_throttled) { + if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled) { spin_unlock_bh(&port->lock); return 0; } - port->write_urb_busy = 1; + clear_bit(0, &port->write_urbs_free); spin_unlock_bh(&port->lock); /* At this point the URB is in our control, nobody else can submit it @@ -565,7 +565,7 @@ static int keyspan_pda_write(struct tty_struct *tty, rc = count; exit: if (rc < 0) - port->write_urb_busy = 0; + set_bit(0, &port->write_urbs_free); return rc; } @@ -575,7 +575,7 @@ static void keyspan_pda_write_bulk_callback(struct urb *urb) struct usb_serial_port *port = urb->context; struct keyspan_pda_private *priv; - port->write_urb_busy = 0; + set_bit(0, &port->write_urbs_free); priv = usb_get_serial_port_data(port); /* queue up a wakeup at scheduler time */ @@ -608,7 +608,7 @@ static int keyspan_pda_chars_in_buffer(struct tty_struct *tty) n_tty.c:normal_poll() ) that we're not writeable. */ spin_lock_irqsave(&port->lock, flags); - if (port->write_urb_busy || priv->tx_throttled) + if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled) ret = 256; spin_unlock_irqrestore(&port->lock, flags); return ret; |
