staging: comedi: usbduxsigma: remove 'probed' checks in comedi functions

The 'probed' flag in the private data is used by the usb_driver (*probe)
function to find a free entry in the static usbduxsub array to use for
the comedi_device private data. The (*probe) sets this flag before it
hands off the probe to the comedi_driver (*auto_attach). The 'probed'
flag is cleared in tidy_up() are part of the usb_driver (*disconnect),
which calls the comedi_driver (*detach).

The 'probed' flag will always be set if the comedi_driver (*auto_attach)
completes successfully. The extra sanity checks in the comedi functions
are not needed. Remove them.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/usbduxsigma.c b/drivers/staging/comedi/drivers/usbduxsigma.c
index 2046444..d705b07 100644 (file)
--- a/drivers/staging/comedi/drivers/usbduxsigma.c
+++ b/drivers/staging/comedi/drivers/usbduxsigma.c
@@ -659,9 +659,6 @@ static int usbdux_ai_cmdtest(struct comedi_device *dev,
        int err = 0, i;
        unsigned int tmpTimer;
 
-       if (!(this_usbduxsub->probed))
-               return -ENODEV;
-
        /* Step 1 : check if triggers are trivially valid */
 
        err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
@@ -823,10 +820,6 @@ static int usbdux_ai_inttrig(struct comedi_device *dev,
                return -EFAULT;
 
        down(&this_usbduxsub->sem);
-       if (!(this_usbduxsub->probed)) {
-               up(&this_usbduxsub->sem);
-               return -ENODEV;
-       }
        if (trignum != 0) {
                dev_err(&this_usbduxsub->interface->dev,
                        "comedi%d: usbdux_ai_inttrig: invalid trignum\n",
@@ -869,11 +862,6 @@ static int usbdux_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 
        /* block other CPUs from starting an ai_cmd */
        down(&this_usbduxsub->sem);
-
-       if (!(this_usbduxsub->probed)) {
-               up(&this_usbduxsub->sem);
-               return -ENODEV;
-       }
        if (this_usbduxsub->ai_cmd_running) {
                dev_err(&this_usbduxsub->interface->dev, "comedi%d: "
                        "ai_cmd not possible. Another ai_cmd is running.\n",
@@ -991,10 +979,6 @@ static int usbdux_ai_insn_read(struct comedi_device *dev,
                return 0;
 
        down(&this_usbduxsub->sem);
-       if (!(this_usbduxsub->probed)) {
-               up(&this_usbduxsub->sem);
-               return -ENODEV;
-       }
        if (this_usbduxsub->ai_cmd_running) {
                dev_err(&this_usbduxsub->interface->dev,
                        "comedi%d: ai_insn_read not possible. "
@@ -1134,10 +1118,6 @@ static int usbdux_ao_insn_read(struct comedi_device *dev,
                return -EFAULT;
 
        down(&this_usbduxsub->sem);
-       if (!(this_usbduxsub->probed)) {
-               up(&this_usbduxsub->sem);
-               return -ENODEV;
-       }
        for (i = 0; i < insn->n; i++)
                data[i] = this_usbduxsub->outBuffer[chan];
 
@@ -1157,10 +1137,6 @@ static int usbdux_ao_insn_write(struct comedi_device *dev,
                return -EFAULT;
 
        down(&this_usbduxsub->sem);
-       if (!(this_usbduxsub->probed)) {
-               up(&this_usbduxsub->sem);
-               return -ENODEV;
-       }
        if (this_usbduxsub->ao_cmd_running) {
                dev_err(&this_usbduxsub->interface->dev,
                        "comedi%d: ao_insn_write: "
@@ -1201,11 +1177,6 @@ static int usbdux_ao_inttrig(struct comedi_device *dev,
                return -EFAULT;
 
        down(&this_usbduxsub->sem);
-
-       if (!(this_usbduxsub->probed)) {
-               ret = -ENODEV;
-               goto out;
-       }
        if (trignum != 0) {
                dev_err(&this_usbduxsub->interface->dev,
                        "comedi%d: usbdux_ao_inttrig: invalid trignum\n",
@@ -1243,9 +1214,6 @@ static int usbdux_ao_cmdtest(struct comedi_device *dev,
        if (!this_usbduxsub)
                return -EFAULT;
 
-       if (!(this_usbduxsub->probed))
-               return -ENODEV;
-
        /* Step 1 : check if triggers are trivially valid */
 
        err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
@@ -1320,11 +1288,6 @@ static int usbdux_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
                return -EFAULT;
 
        down(&this_usbduxsub->sem);
-       if (!(this_usbduxsub->probed)) {
-               up(&this_usbduxsub->sem);
-               return -ENODEV;
-       }
-
        /* set current channel of the running acquisition to zero */
        s->async->cur_chan = 0;
        for (i = 0; i < cmd->chanlist_len; ++i) {
@@ -1460,11 +1423,6 @@ static int usbdux_dio_insn_bits(struct comedi_device *dev,
 
        down(&this_usbduxsub->sem);
 
-       if (!(this_usbduxsub->probed)) {
-               up(&this_usbduxsub->sem);
-               return -ENODEV;
-       }
-
        /* The insn data is a mask in data[0] and the new data
         * in data[1], each channel cooresponding to a bit. */
        s->state &= ~data[0];
@@ -1991,7 +1949,7 @@ static int usbduxsigma_auto_attach(struct comedi_device *dev,
        dev->private = NULL;
 
        down(&start_stop_sem);
-       if (!uds || !uds->probed) {
+       if (!uds) {
                dev_err(dev->class_dev,
                        "usbduxsigma: error: auto_attach failed, not connected\n");
                ret = -ENODEV;