From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Wed, 5 Aug 2015 17:44:41 +0000 (-0700)
Subject: staging: comedi: me4000: remove 'chan' check in me4000_ai_insn_read()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=03611e5491e488f30a5b7653e02ee65032cfba14;p=linux-beck.git

staging: comedi: me4000: remove 'chan' check in me4000_ai_insn_read()

The comedi core validates that the 'chan' is valid for the subdevice
before calling the (*insn_read) operation. Remove the unnecessary check.

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>
---

diff --git a/drivers/staging/comedi/drivers/me4000.c b/drivers/staging/comedi/drivers/me4000.c
index 171749b06ef2..d6b7adc19056 100644
--- a/drivers/staging/comedi/drivers/me4000.c
+++ b/drivers/staging/comedi/drivers/me4000.c
@@ -477,11 +477,6 @@ static int me4000_ai_insn_read(struct comedi_device *dev,
 	switch (aref) {
 	case AREF_GROUND:
 	case AREF_COMMON:
-		if (chan >= board->ai_nchan) {
-			dev_err(dev->class_dev,
-				"Analog input is not available\n");
-			return -EINVAL;
-		}
 		entry |= ME4000_AI_LIST_INPUT_SINGLE_ENDED | chan;
 		break;