diff options
| author | Ian Abbott <abbotti@mev.co.uk> | 2012-09-19 19:37:40 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-09-21 09:29:54 -0700 |
| commit | 44b255f7b13bacb076e2789352e4a8afe19b922e (patch) | |
| tree | 7c5763a1a2d037301850263caf6c152d2d1d7103 /drivers/staging/comedi | |
| parent | c8cad4c89ee3b15935c532210ae6ebb5c0a2734d (diff) | |
| download | blackbird-op-linux-44b255f7b13bacb076e2789352e4a8afe19b922e.tar.gz blackbird-op-linux-44b255f7b13bacb076e2789352e4a8afe19b922e.zip | |
staging: comedi: das16: pass struct comedi_cmd by reference
Change `das16_suggest_transfer_size()` to take a pointer to the `struct
comedi_cmd` instead of passing it by value.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/comedi')
| -rw-r--r-- | drivers/staging/comedi/drivers/das16.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/staging/comedi/drivers/das16.c b/drivers/staging/comedi/drivers/das16.c index 2a38915c69e8..744376a49d08 100644 --- a/drivers/staging/comedi/drivers/das16.c +++ b/drivers/staging/comedi/drivers/das16.c @@ -558,7 +558,7 @@ static int das16_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s, /* utility function that suggests a dma transfer size in bytes */ static unsigned int das16_suggest_transfer_size(struct comedi_device *dev, - struct comedi_cmd cmd) + const struct comedi_cmd *cmd) { unsigned int size; unsigned int freq; @@ -571,16 +571,16 @@ static unsigned int das16_suggest_transfer_size(struct comedi_device *dev, /* otherwise, we are relying on dma terminal count interrupt, * so pick a reasonable size */ - if (cmd.convert_src == TRIG_TIMER) - freq = 1000000000 / cmd.convert_arg; - else if (cmd.scan_begin_src == TRIG_TIMER) - freq = (1000000000 / cmd.scan_begin_arg) * cmd.chanlist_len; + if (cmd->convert_src == TRIG_TIMER) + freq = 1000000000 / cmd->convert_arg; + else if (cmd->scan_begin_src == TRIG_TIMER) + freq = (1000000000 / cmd->scan_begin_arg) * cmd->chanlist_len; /* return some default value */ else freq = 0xffffffff; - if (cmd.flags & TRIG_WAKE_EOS) { - size = sample_size * cmd.chanlist_len; + if (cmd->flags & TRIG_WAKE_EOS) { + size = sample_size * cmd->chanlist_len; } else { /* make buffer fill in no more than 1/3 second */ size = (freq / 3) * sample_size; @@ -592,7 +592,7 @@ static unsigned int das16_suggest_transfer_size(struct comedi_device *dev, else if (size < sample_size) size = sample_size; - if (cmd.stop_src == TRIG_COUNT && size > devpriv->adc_byte_count) + if (cmd->stop_src == TRIG_COUNT && size > devpriv->adc_byte_count) size = devpriv->adc_byte_count; return size; @@ -685,7 +685,7 @@ static int das16_cmd_exec(struct comedi_device *dev, struct comedi_subdevice *s) set_dma_addr(devpriv->dma_chan, devpriv->dma_buffer_addr[devpriv->current_buffer]); /* set appropriate size of transfer */ - devpriv->dma_transfer_size = das16_suggest_transfer_size(dev, *cmd); + devpriv->dma_transfer_size = das16_suggest_transfer_size(dev, cmd); set_dma_count(devpriv->dma_chan, devpriv->dma_transfer_size); enable_dma(devpriv->dma_chan); release_dma_lock(flags); |
