staging: comedi: pass subdevice to comedi_buf_write_alloc()

Change the parameters of `comedi_buf_write_alloc()` to pass a pointer to
the comedi subdevice instead of a pointer to the "async" structure
belonging to the subdevice.

The main aim at the moment is to replace all the `struct comedi_async *`
parameters with `struct comedi_subdevice *` parameters in the comedi
driver API.

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

diff --git a/drivers/staging/comedi/comedi_buf.c b/drivers/staging/comedi/comedi_buf.c
index 199ebb4..6a65500 100644 (file)
--- a/drivers/staging/comedi/comedi_buf.c
+++ b/drivers/staging/comedi/comedi_buf.c
@@ -269,10 +269,10 @@ static unsigned int __comedi_buf_write_alloc(struct comedi_async *async,
 }
 
 /* allocates chunk for the writer from free buffer space */
-unsigned int comedi_buf_write_alloc(struct comedi_async *async,
+unsigned int comedi_buf_write_alloc(struct comedi_subdevice *s,
                                    unsigned int nbytes)
 {
-       return __comedi_buf_write_alloc(async, nbytes, 0);
+       return __comedi_buf_write_alloc(s->async, nbytes, 0);
 }
 EXPORT_SYMBOL_GPL(comedi_buf_write_alloc);
 

diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index 0affd1f..58c1f6e 100644 (file)
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -1004,7 +1004,7 @@ static int do_bufinfo_ioctl(struct comedi_device *dev,
 
        if (bi.bytes_written && (s->subdev_flags & SDF_CMD_WRITE)) {
                bi.bytes_written =
-                   comedi_buf_write_alloc(async, bi.bytes_written);
+                   comedi_buf_write_alloc(s, bi.bytes_written);
                comedi_buf_write_free(async, bi.bytes_written);
        }
 
@@ -2038,7 +2038,7 @@ static unsigned int comedi_poll(struct file *file, poll_table *wait)
                unsigned int bps = bytes_per_sample(s);
 
                poll_wait(file, &s->async->wait_head, wait);
-               comedi_buf_write_alloc(s->async, s->async->prealloc_bufsz);
+               comedi_buf_write_alloc(s, s->async->prealloc_bufsz);
                if (!s->busy || !comedi_is_subdevice_running(s) ||
                    comedi_buf_write_n_allocated(s->async) >= bps)
                        mask |= POLLOUT | POLLWRNORM;
@@ -2136,7 +2136,7 @@ static ssize_t comedi_write(struct file *file, const char __user *buf,
                m = n;
                if (async->buf_write_ptr + m > async->prealloc_bufsz)
                        m = async->prealloc_bufsz - async->buf_write_ptr;
-               comedi_buf_write_alloc(async, async->prealloc_bufsz);
+               comedi_buf_write_alloc(s, async->prealloc_bufsz);
                if (m > comedi_buf_write_n_allocated(async))
                        m = comedi_buf_write_n_allocated(async);
                if (m < n)

diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index 0a68006..b47cc96 100644 (file)
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -336,7 +336,7 @@ static inline unsigned int bytes_per_sample(const struct comedi_subdevice *subd)
  */
 int comedi_set_hw_dev(struct comedi_device *dev, struct device *hw_dev);
 
-unsigned int comedi_buf_write_alloc(struct comedi_async *, unsigned int);
+unsigned int comedi_buf_write_alloc(struct comedi_subdevice *s, unsigned int n);
 unsigned int comedi_buf_write_free(struct comedi_async *, unsigned int);
 
 unsigned int comedi_buf_read_n_available(struct comedi_async *);

diff --git a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3200.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3200.c
index 51095be..246220a 100644 (file)
--- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3200.c
+++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3200.c
@@ -2702,8 +2702,7 @@ static int i_APCI3200_InterruptHandleEos(struct comedi_device *dev)
                        s->async->events |= COMEDI_CB_EOS;
 
                        /*  Test if enougth memory is available and allocate it for 7 values */
-                       /* n = comedi_buf_write_alloc(s->async, 7*sizeof(unsigned int)); */
-                       n = comedi_buf_write_alloc(s->async,
+                       n = comedi_buf_write_alloc(s,
                                (7 + 12) * sizeof(unsigned int));
 
                        /*  If not enough memory available, event is set to Comedi Buffer Error */

diff --git a/drivers/staging/comedi/drivers/comedi_fc.c b/drivers/staging/comedi/drivers/comedi_fc.c
index 5eff9d1..21cf34e 100644 (file)
--- a/drivers/staging/comedi/drivers/comedi_fc.c
+++ b/drivers/staging/comedi/drivers/comedi_fc.c
@@ -67,7 +67,7 @@ unsigned int cfc_write_array_to_buffer(struct comedi_subdevice *s,
        if (num_bytes == 0)
                return 0;
 
-       retval = comedi_buf_write_alloc(async, num_bytes);
+       retval = comedi_buf_write_alloc(s, num_bytes);
        if (retval != num_bytes) {
                dev_warn(s->device->class_dev, "buffer overrun\n");
                async->events |= COMEDI_CB_OVERFLOW;

diff --git a/drivers/staging/comedi/drivers/mite.c b/drivers/staging/comedi/drivers/mite.c
index 1a572c8..a5999f5 100644 (file)
--- a/drivers/staging/comedi/drivers/mite.c
+++ b/drivers/staging/comedi/drivers/mite.c
@@ -533,7 +533,7 @@ int mite_sync_input_dma(struct mite_channel *mite_chan,
 
        old_alloc_count = async->buf_write_alloc_count;
        /* write alloc as much as we can */
-       comedi_buf_write_alloc(async, async->prealloc_bufsz);
+       comedi_buf_write_alloc(s, async->prealloc_bufsz);
 
        nbytes = mite_bytes_written_to_memory_lb(mite_chan);
        if ((int)(mite_bytes_written_to_memory_ub(mite_chan) -

diff --git a/drivers/staging/comedi/drivers/ni_mio_common.c b/drivers/staging/comedi/drivers/ni_mio_common.c
index d4e99af..d8415fe 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_mio_common.c
+++ b/drivers/staging/comedi/drivers/ni_mio_common.c
@@ -1505,7 +1505,7 @@ static int ni_ai_setup_MITE_dma(struct comedi_device *dev)
 /* printk("comedi_debug: using mite channel %i for ai.\n", devpriv->ai_mite_chan->channel); */
 
        /* write alloc the entire buffer */
-       comedi_buf_write_alloc(s->async, s->async->prealloc_bufsz);
+       comedi_buf_write_alloc(s, s->async->prealloc_bufsz);
 
        spin_lock_irqsave(&devpriv->mite_channel_lock, flags);
        if (devpriv->ai_mite_chan == NULL) {

diff --git a/drivers/staging/comedi/drivers/ni_pcidio.c b/drivers/staging/comedi/drivers/ni_pcidio.c
index 6dd1004..d0ad82a 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_pcidio.c
+++ b/drivers/staging/comedi/drivers/ni_pcidio.c
@@ -759,7 +759,7 @@ static int setup_mite_dma(struct comedi_device *dev, struct comedi_subdevice *s)
                return retval;
 
        /* write alloc the entire buffer */
-       comedi_buf_write_alloc(s->async, s->async->prealloc_bufsz);
+       comedi_buf_write_alloc(s, s->async->prealloc_bufsz);
 
        spin_lock_irqsave(&devpriv->mite_channel_lock, flags);
        if (devpriv->di_mite_chan) {

diff --git a/drivers/staging/comedi/drivers/ni_tiocmd.c b/drivers/staging/comedi/drivers/ni_tiocmd.c
index 7a163fc..9cc77c0 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_tiocmd.c
+++ b/drivers/staging/comedi/drivers/ni_tiocmd.c
@@ -125,7 +125,7 @@ static int ni_tio_input_cmd(struct comedi_subdevice *s)
        int retval = 0;
 
        /* write alloc the entire buffer */
-       comedi_buf_write_alloc(async, async->prealloc_bufsz);
+       comedi_buf_write_alloc(s, async->prealloc_bufsz);
        counter->mite_chan->dir = COMEDI_INPUT;
        switch (counter_dev->variant) {
        case ni_gpct_variant_m_series: