staging: comedi: remove this_board macro in the pcl818 driver

The 'this_board' macro depends on having a local variable with
a magic name. The CodingStyle document suggests not doing this
to avoid confusion. Remove the macro and use the comedi_board()
inline helper to get the dev->board_ptr information.

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

diff --git a/drivers/staging/comedi/drivers/pcl818.c b/drivers/staging/comedi/drivers/pcl818.c
index 1406c97..6c84b29 100644 (file)
--- a/drivers/staging/comedi/drivers/pcl818.c
+++ b/drivers/staging/comedi/drivers/pcl818.c
@@ -326,7 +326,6 @@ static const unsigned int muxonechan[] = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0
 };
 
 #define devpriv ((struct pcl818_private *)dev->private)
-#define this_board ((const struct pcl818_board *)dev->board_ptr)
 
 /*
 ==============================================================================
@@ -1264,6 +1263,7 @@ static int check_single_ended(unsigned int port)
 static int ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
                      struct comedi_cmd *cmd)
 {
+       const struct pcl818_board *board = comedi_board(dev);
        int err = 0;
        int tmp, divisor1 = 0, divisor2 = 0;
 
@@ -1334,8 +1334,8 @@ static int ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
        }
 
        if (cmd->convert_src == TRIG_TIMER) {
-               if (cmd->convert_arg < this_board->ns_min) {
-                       cmd->convert_arg = this_board->ns_min;
+               if (cmd->convert_arg < board->ns_min) {
+                       cmd->convert_arg = board->ns_min;
                        err++;
                }
        } else {                /* TRIG_EXT */
@@ -1371,8 +1371,8 @@ static int ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
                i8253_cascade_ns_to_timer(devpriv->i8253_osc_base, &divisor1,
                                          &divisor2, &cmd->convert_arg,
                                          cmd->flags & TRIG_ROUND_MASK);
-               if (cmd->convert_arg < this_board->ns_min)
-                       cmd->convert_arg = this_board->ns_min;
+               if (cmd->convert_arg < board->ns_min)
+                       cmd->convert_arg = board->ns_min;
                if (tmp != cmd->convert_arg)
                        err++;
        }
@@ -1519,6 +1519,8 @@ static int pcl818_check(unsigned long iobase)
 */
 static void pcl818_reset(struct comedi_device *dev)
 {
+       const struct pcl818_board *board = comedi_board(dev);
+
        if (devpriv->usefifo) { /*  FIFO shutdown */
                outb(0, dev->iobase + PCL818_FI_INTCLR);
                outb(0, dev->iobase + PCL818_FI_FLUSH);
@@ -1537,7 +1539,7 @@ static void pcl818_reset(struct comedi_device *dev)
        outb(0xb0, dev->iobase + PCL818_CTRCTL);        /* Stop pacer */
        outb(0x70, dev->iobase + PCL818_CTRCTL);
        outb(0x30, dev->iobase + PCL818_CTRCTL);
-       if (this_board->is_818) {
+       if (board->is_818) {
                outb(0, dev->iobase + PCL818_RANGE);
        } else {
                outb(0, dev->iobase + PCL718_DA2_LO);
@@ -1636,6 +1638,7 @@ static int rtc_setfreq_irq(int freq)
 
 static int pcl818_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 {
+       const struct pcl818_board *board = comedi_board(dev);
        int ret;
        unsigned long iobase;
        unsigned int irq;
@@ -1651,9 +1654,10 @@ static int pcl818_attach(struct comedi_device *dev, struct comedi_devconfig *it)
        iobase = it->options[0];
        printk
            ("comedi%d: pcl818:  board=%s, ioport=0x%03lx",
-            dev->minor, this_board->name, iobase);
-       devpriv->io_range = this_board->io_range;
-       if ((this_board->fifo) && (it->options[2] == -1)) {     /*  we've board with FIFO and we want to use FIFO */
+            dev->minor, board->name, iobase);
+       devpriv->io_range = board->io_range;
+       if ((board->fifo) && (it->options[2] == -1)) {
+               /*  we've board with FIFO and we want to use FIFO */
                devpriv->io_range = PCLx1xFIFO_RANGE;
                devpriv->usefifo = 1;
        }
@@ -1669,14 +1673,14 @@ static int pcl818_attach(struct comedi_device *dev, struct comedi_devconfig *it)
                return -EIO;
        }
 
-       /* set up some name stuff */
-       dev->board_name = this_board->name;
+       dev->board_name = board->name;
+
        /* grab our IRQ */
        irq = 0;
-       if (this_board->IRQbits != 0) { /* board support IRQ */
+       if (board->IRQbits != 0) {      /* board support IRQ */
                irq = it->options[1];
                if (irq) {      /* we want to use IRQ */
-                       if (((1 << irq) & this_board->IRQbits) == 0) {
+                       if (((1 << irq) & board->IRQbits) == 0) {
                                printk
                                    (", IRQ %u is out of allowed range, DISABLING IT",
                                     irq);
@@ -1740,11 +1744,11 @@ no_rtc:
        devpriv->dma = dma;
        if ((devpriv->irq_free == 0) && (devpriv->dma_rtc == 0))
                goto no_dma;    /* if we haven't IRQ, we can't use DMA */
-       if (this_board->DMAbits != 0) { /* board support DMA */
+       if (board->DMAbits != 0) {      /* board support DMA */
                dma = it->options[2];
                if (dma < 1)
                        goto no_dma;    /* DMA disabled */
-               if (((1 << dma) & this_board->DMAbits) == 0) {
+               if (((1 << dma) & board->DMAbits) == 0) {
                        printk(KERN_ERR "DMA is out of allowed range, FAIL!\n");
                        return -EINVAL; /* Bad DMA */
                }
@@ -1779,24 +1783,24 @@ no_dma:
                return ret;
 
        s = dev->subdevices + 0;
-       if (!this_board->n_aichan_se) {
+       if (!board->n_aichan_se) {
                s->type = COMEDI_SUBD_UNUSED;
        } else {
                s->type = COMEDI_SUBD_AI;
                devpriv->sub_ai = s;
                s->subdev_flags = SDF_READABLE;
                if (check_single_ended(dev->iobase)) {
-                       s->n_chan = this_board->n_aichan_se;
+                       s->n_chan = board->n_aichan_se;
                        s->subdev_flags |= SDF_COMMON | SDF_GROUND;
                        printk(", %dchans S.E. DAC", s->n_chan);
                } else {
-                       s->n_chan = this_board->n_aichan_diff;
+                       s->n_chan = board->n_aichan_diff;
                        s->subdev_flags |= SDF_DIFF;
                        printk(", %dchans DIFF DAC", s->n_chan);
                }
-               s->maxdata = this_board->ai_maxdata;
+               s->maxdata = board->ai_maxdata;
                s->len_chanlist = s->n_chan;
-               s->range_table = this_board->ai_range_type;
+               s->range_table = board->ai_range_type;
                s->cancel = pcl818_ai_cancel;
                s->insn_read = pcl818_ai_insn_read;
                if ((irq) || (devpriv->dma_rtc)) {
@@ -1805,7 +1809,7 @@ no_dma:
                        s->do_cmdtest = ai_cmdtest;
                        s->do_cmd = ai_cmd;
                }
-               if (this_board->is_818) {
+               if (board->is_818) {
                        if ((it->options[4] == 1) || (it->options[4] == 10))
                                s->range_table = &range_pcl818l_h_ai;   /*  secondary range list jumper selectable */
                } else {
@@ -1845,15 +1849,15 @@ no_dma:
        }
 
        s = dev->subdevices + 1;
-       if (!this_board->n_aochan) {
+       if (!board->n_aochan) {
                s->type = COMEDI_SUBD_UNUSED;
        } else {
                s->type = COMEDI_SUBD_AO;
                s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
-               s->n_chan = this_board->n_aochan;
-               s->maxdata = this_board->ao_maxdata;
-               s->len_chanlist = this_board->n_aochan;
-               s->range_table = this_board->ao_range_type;
+               s->n_chan = board->n_aochan;
+               s->maxdata = board->ao_maxdata;
+               s->len_chanlist = board->n_aochan;
+               s->range_table = board->ao_range_type;
                s->insn_read = pcl818_ao_insn_read;
                s->insn_write = pcl818_ao_insn_write;
 #ifdef unused
@@ -1864,7 +1868,7 @@ no_dma:
                }
 #endif
 #endif
-               if (this_board->is_818) {
+               if (board->is_818) {
                        if ((it->options[4] == 1) || (it->options[4] == 10))
                                s->range_table = &range_unipolar10;
                        if (it->options[4] == 2)
@@ -1878,27 +1882,27 @@ no_dma:
        }
 
        s = dev->subdevices + 2;
-       if (!this_board->n_dichan) {
+       if (!board->n_dichan) {
                s->type = COMEDI_SUBD_UNUSED;
        } else {
                s->type = COMEDI_SUBD_DI;
                s->subdev_flags = SDF_READABLE;
-               s->n_chan = this_board->n_dichan;
+               s->n_chan = board->n_dichan;
                s->maxdata = 1;
-               s->len_chanlist = this_board->n_dichan;
+               s->len_chanlist = board->n_dichan;
                s->range_table = &range_digital;
                s->insn_bits = pcl818_di_insn_bits;
        }
 
        s = dev->subdevices + 3;
-       if (!this_board->n_dochan) {
+       if (!board->n_dochan) {
                s->type = COMEDI_SUBD_UNUSED;
        } else {
                s->type = COMEDI_SUBD_DO;
                s->subdev_flags = SDF_WRITABLE;
-               s->n_chan = this_board->n_dochan;
+               s->n_chan = board->n_dochan;
                s->maxdata = 1;
-               s->len_chanlist = this_board->n_dochan;
+               s->len_chanlist = board->n_dochan;
                s->range_table = &range_digital;
                s->insn_bits = pcl818_do_insn_bits;
        }
@@ -1910,9 +1914,9 @@ no_dma:
                devpriv->i8253_osc_base = 1000;
 
        /* max sampling speed */
-       devpriv->ns_min = this_board->ns_min;
+       devpriv->ns_min = board->ns_min;
 
-       if (!this_board->is_818) {
+       if (!board->is_818) {
                if ((it->options[6] == 1) || (it->options[6] == 100))
                        devpriv->ns_min = 10000;        /* extended PCL718 to 100kHz DAC */
        }