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staging: comedi: check data length for INSN_CONFIG_DIGITAL_TRIG

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The newly defined format for the `INSN_CONFIG_DIGITAL_TRIG`
configuration instruction expects 6 data values.  Check the length in
`check_insn_config_length()` before calling the comedi subdevice's
`insn_config` handler.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2012-11-14 11:22:57 +00:00 committed by Greg Kroah-Hartman
parent 33cdce6293
commit b0a2b6d8ac
1 changed files with 4 additions and 0 deletions
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4
drivers/staging/comedi/comedi_fops.c
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@ -880,6 +880,10 @@ static int check_insn_config_length(struct comedi_insn *insn,
if (insn->n == 5)
return 0;
break;
case INSN_CONFIG_DIGITAL_TRIG:
if (insn->n == 6)
return 0;
break;
/* by default we allow the insn since we don't have checks for
* all possible cases yet */
default: