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quatech_daqp_cs: don't access *data when insn->n == 0
[comedi.git]
/
comedi
/
drivers
/
quatech_daqp_cs.c
diff --git
a/comedi/drivers/quatech_daqp_cs.c
b/comedi/drivers/quatech_daqp_cs.c
index b9c1a541927d9172ca50c66ebb4f7416a0959125..fb1750547f264fddc4c19ea460c5bdcd6a7598d1 100644
(file)
--- a/
comedi/drivers/quatech_daqp_cs.c
+++ b/
comedi/drivers/quatech_daqp_cs.c
@@
-825,6
+825,9
@@
static int daqp_ao_insn_write(comedi_device * dev, comedi_subdevice * s,
return -EIO;
}
+ if (insn->n == 0)
+ return 0;
+
chan = CR_CHAN(insn->chanspec);
d = data[0];
d &= 0x0fff;
@@
-866,6
+869,9
@@
static int daqp_do_insn_write(comedi_device * dev, comedi_subdevice * s,
return -EIO;
}
+ if (insn->n == 0)
+ return 0;
+
outw(data[0] & 0xf, dev->iobase + DAQP_DIGITAL_IO);
return 1;