add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/staging/comedi/range.c
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@@ -46,17 +46,14 @@
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  *	array of comedi_krange structures to rangeinfo->range_ptr pointer
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  */
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 int do_rangeinfo_ioctl(struct comedi_device *dev,
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-		       struct comedi_rangeinfo __user *arg)
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+		       struct comedi_rangeinfo *it)
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 {
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-	struct comedi_rangeinfo it;
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 	int subd, chan;
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 	const struct comedi_lrange *lr;
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 	struct comedi_subdevice *s;
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-	if (copy_from_user(&it, arg, sizeof(struct comedi_rangeinfo)))
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-		return -EFAULT;
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-	subd = (it.range_type >> 24) & 0xf;
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-	chan = (it.range_type >> 16) & 0xff;
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+	subd = (it->range_type >> 24) & 0xf;
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+	chan = (it->range_type >> 16) & 0xff;
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 	if (!dev->attached)
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 		return -EINVAL;
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@@ -73,15 +70,15 @@
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 		return -EINVAL;
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 	}
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-	if (RANGE_LENGTH(it.range_type) != lr->length) {
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+	if (RANGE_LENGTH(it->range_type) != lr->length) {
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 		dev_dbg(dev->class_dev,
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 			"wrong length %d should be %d (0x%08x)\n",
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-			RANGE_LENGTH(it.range_type),
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-			lr->length, it.range_type);
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+			RANGE_LENGTH(it->range_type),
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+			lr->length, it->range_type);
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 		return -EINVAL;
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 	}
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-	if (copy_to_user(it.range_ptr, lr->range,
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+	if (copy_to_user(it->range_ptr, lr->range,
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 			 sizeof(struct comedi_krange) * lr->length))
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 		return -EFAULT;
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