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staging: comedi: usbduxsigma: 'dac_commands' does not need to be kzalloc()'d 

The 'dac_commands' buffer is used to pass the ao channel list from
usbduxsigma_ao_cmd() to the urb callback, usbduxsigma_ao_urb_complete().
This buffer does not need to be allocated.

Change it into a simple array of the correct size. Rename the variable
to 'ao_chanlist' to clarify what it actually is.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2013-07-29 17:46:46 -07:00 committed by Greg Kroah-Hartman
parent ef1e3c4a3b
commit 315a276da9
1 changed files with 4 additions and 8 deletions
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12
drivers/staging/comedi/drivers/usbduxsigma.c
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@ -161,6 +161,7 @@ struct usbduxsigma_private {
/* input buffer for single insn */
int8_t *insn_buf;
int8_t ao_chanlist[USBDUXSIGMA_NUM_AO_CHAN];
unsigned int ao_readback[USBDUXSIGMA_NUM_AO_CHAN];
unsigned high_speed:1;
@ -181,8 +182,6 @@ struct usbduxsigma_private {
unsigned int ao_counter;
/* interval in frames/uframes */
unsigned int ai_interval;
/* D/A commands */
uint8_t *dac_commands;
/* commands */
uint8_t *dux_commands;
struct semaphore sem;
@ -421,7 +420,7 @@ static void usbduxsigma_ao_urb_complete(struct urb *urb)
len = s->async->cmd.chanlist_len;
*datap++ = len;
for (i = 0; i < len; i++) {
unsigned int chan = devpriv->dac_commands[i];
unsigned int chan = devpriv->ao_chanlist[i];
short val;
ret = comedi_buf_get(s->async, &val);
@ -1011,7 +1010,7 @@ static int usbduxsigma_ao_cmd(struct comedi_device *dev,
/* set current channel of the running acquisition to zero */
s->async->cur_chan = 0;
for (i = 0; i < cmd->chanlist_len; ++i)
devpriv->dac_commands[i] = CR_CHAN(cmd->chanlist[i]);
devpriv->ao_chanlist[i] = CR_CHAN(cmd->chanlist[i]);
devpriv->ao_counter = devpriv->ao_timer;
@ -1542,7 +1541,6 @@ static int usbduxsigma_alloc_usb_buffers(struct comedi_device *dev)
struct urb *urb;
int i;
devpriv->dac_commands = kzalloc(NUMOUTCHANNELS, GFP_KERNEL);
devpriv->dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL);
devpriv->in_buf = kzalloc(SIZEINBUF, GFP_KERNEL);
devpriv->insn_buf = kzalloc(SIZEINSNBUF, GFP_KERNEL);
@ -1550,8 +1548,7 @@ static int usbduxsigma_alloc_usb_buffers(struct comedi_device *dev)
GFP_KERNEL);
devpriv->ao_urbs = kcalloc(devpriv->n_ao_urbs, sizeof(*urb),
GFP_KERNEL);
if (!devpriv->dac_commands || !devpriv->dux_commands ||
!devpriv->in_buf || !devpriv->insn_buf ||
if (!devpriv->dux_commands || !devpriv->in_buf || !devpriv->insn_buf ||
!devpriv->ai_urbs || !devpriv->ao_urbs)
return -ENOMEM;
@ -1660,7 +1657,6 @@ static void usbduxsigma_free_usb_buffers(struct comedi_device *dev)
kfree(devpriv->insn_buf);
kfree(devpriv->in_buf);
kfree(devpriv->dux_commands);
kfree(devpriv->dac_commands);
}
static int usbduxsigma_auto_attach(struct comedi_device *dev,