From: H Hartley Sweeten Date: Wed, 24 Jul 2013 21:10:54 +0000 (-0700) Subject: staging: comedi: usbdux: tidy up usbduxsub_ao_isoc_irq() X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=e057288ffd62ae63536d1f37dad4a22d2b84148b;p=openwrt%2Fstaging%2Fblogic.git staging: comedi: usbdux: tidy up usbduxsub_ao_isoc_irq() Rename the local variables to the comedi "norm". The comedi_subdevice in this function is actually the dev->write_subdev that was initialized in the attach. Use that instead of accessing the dev->subdevices array directly. Use dev->class_dev as the device for all dev_printk() messages. Instead of using the 'comedidev' back pointer in the private data, use the comedi_device 'dev' that we already have. Signed-off-by: H Hartley Sweeten Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/usbdux.c b/drivers/staging/comedi/drivers/usbdux.c index d93d10950abd..292832b2b5e9 100644 --- a/drivers/staging/comedi/drivers/usbdux.c +++ b/drivers/staging/comedi/drivers/usbdux.c @@ -535,18 +535,11 @@ static int usbdux_ao_cancel(struct comedi_device *dev, static void usbduxsub_ao_isoc_irq(struct urb *urb) { + struct comedi_device *dev = urb->context; + struct comedi_subdevice *s = dev->write_subdev; + struct usbdux_private *devpriv = dev->private; int i, ret; int8_t *datap; - struct usbdux_private *this_usbduxsub; - struct comedi_device *this_comedidev; - struct comedi_subdevice *s; - - /* the context variable points to the subdevice */ - this_comedidev = urb->context; - /* the private structure of the subdevice is struct usbdux_private */ - this_usbduxsub = this_comedidev->private; - - s = &this_comedidev->subdevices[SUBDEV_DA]; switch (urb->status) { case 0: @@ -559,47 +552,47 @@ static void usbduxsub_ao_isoc_irq(struct urb *urb) case -ECONNABORTED: /* after an unlink command, unplug, ... etc */ /* no unlink needed here. Already shutting down. */ - if (this_usbduxsub->ao_cmd_running) { + if (devpriv->ao_cmd_running) { s->async->events |= COMEDI_CB_EOA; - comedi_event(this_usbduxsub->comedidev, s); - usbdux_ao_stop(this_usbduxsub, 0); + comedi_event(dev, s); + usbdux_ao_stop(devpriv, 0); } return; default: /* a real error */ - if (this_usbduxsub->ao_cmd_running) { - dev_err(&urb->dev->dev, - "comedi_: Non-zero urb status received in ao " - "intr context: %d\n", urb->status); + if (devpriv->ao_cmd_running) { + dev_err(dev->class_dev, + "Non-zero urb status received in ao intr context: %d\n", + urb->status); s->async->events |= COMEDI_CB_ERROR; s->async->events |= COMEDI_CB_EOA; - comedi_event(this_usbduxsub->comedidev, s); + comedi_event(dev, s); /* we do an unlink if we are in the high speed mode */ - usbdux_ao_stop(this_usbduxsub, 0); + usbdux_ao_stop(devpriv, 0); } return; } /* are we actually running? */ - if (!(this_usbduxsub->ao_cmd_running)) + if (!devpriv->ao_cmd_running) return; /* normal operation: executing a command in this subdevice */ - this_usbduxsub->ao_counter--; - if ((int)this_usbduxsub->ao_counter <= 0) { + devpriv->ao_counter--; + if ((int)devpriv->ao_counter <= 0) { /* timer zero */ - this_usbduxsub->ao_counter = this_usbduxsub->ao_timer; + devpriv->ao_counter = devpriv->ao_timer; /* handle non continous acquisition */ - if (!(this_usbduxsub->ao_continous)) { + if (!devpriv->ao_continous) { /* fixed number of samples */ - this_usbduxsub->ao_sample_count--; - if (this_usbduxsub->ao_sample_count < 0) { + devpriv->ao_sample_count--; + if (devpriv->ao_sample_count < 0) { /* all samples transmitted */ - usbdux_ao_stop(this_usbduxsub, 0); + usbdux_ao_stop(devpriv, 0); s->async->events |= COMEDI_CB_EOA; - comedi_event(this_usbduxsub->comedidev, s); + comedi_event(dev, s); /* no resubmit of the urb */ return; } @@ -619,9 +612,7 @@ static void usbduxsub_ao_isoc_irq(struct urb *urb) ret = comedi_buf_get(s->async, &temp); datap[0] = temp; datap[1] = temp >> 8; - datap[2] = this_usbduxsub->dac_commands[i]; - /* printk("data[0]=%x, data[1]=%x, data[2]=%x\n", */ - /* datap[0],datap[1],datap[2]); */ + datap[2] = devpriv->dac_commands[i]; if (ret < 0) { dev_err(&urb->dev->dev, "comedi: buffer underflow\n"); @@ -630,39 +621,35 @@ static void usbduxsub_ao_isoc_irq(struct urb *urb) } /* transmit data to comedi */ s->async->events |= COMEDI_CB_BLOCK; - comedi_event(this_usbduxsub->comedidev, s); + comedi_event(dev, s); } } urb->transfer_buffer_length = SIZEOUTBUF; - urb->dev = this_usbduxsub->usbdev; + urb->dev = devpriv->usbdev; urb->status = 0; - if (this_usbduxsub->ao_cmd_running) { - if (this_usbduxsub->high_speed) { - /* uframes */ - urb->interval = 8; - } else { - /* frames */ - urb->interval = 1; - } + if (devpriv->ao_cmd_running) { + if (devpriv->high_speed) + urb->interval = 8; /* uframes */ + else + urb->interval = 1; /* frames */ urb->number_of_packets = 1; urb->iso_frame_desc[0].offset = 0; urb->iso_frame_desc[0].length = SIZEOUTBUF; urb->iso_frame_desc[0].status = 0; ret = usb_submit_urb(urb, GFP_ATOMIC); if (ret < 0) { - dev_err(&urb->dev->dev, - "comedi_: ao urb resubm failed in int-cont. " - "ret=%d", ret); + dev_err(dev->class_dev, + "ao urb resubm failed in int-cont. ret=%d", + ret); if (ret == EL2NSYNC) - dev_err(&urb->dev->dev, - "buggy USB host controller or bug in " - "IRQ handling!\n"); + dev_err(dev->class_dev, + "buggy USB host controller or bug in IRQ handling!\n"); s->async->events |= COMEDI_CB_EOA; s->async->events |= COMEDI_CB_ERROR; - comedi_event(this_usbduxsub->comedidev, s); + comedi_event(dev, s); /* don't do an unlink here */ - usbdux_ao_stop(this_usbduxsub, 0); + usbdux_ao_stop(devpriv, 0); } } }