linux-kernel - [PATCH v2] staging: comedi: dt282x: condition with no effect

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Date:	Wed,  4 Feb 2015 12:02:33 -0500
From:	Nicholas Mc Guire <hofrat@...dl.org>
To:	Ian Abbott <abbotti@....co.uk>
Cc:	H Hartley Sweeten <hsweeten@...ionengravers.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	Nicholas Mc Guire <hofrat@...dl.org>
Subject: [PATCH v2] staging: comedi: dt282x: condition with no effect - if identical to else

The if and the else branch code are identical - so the condition has no
effect on the effective code - this patch removes the condition and the
duplicated code.

Signed-off-by: Nicholas Mc Guire <hofrat@...dl.org>
---

v2: Review notes from Ian Abbott <abbotti@....co.uk> and Hartley Sweeten 
    <HartleyS@...ionengravers.com> confirm that the condition is not 
    needed and, as suggested, the misleading comment is completely removed.

Patch was only compile tested for x86_64_defconfig + CONFIG_STAGING=y
CONFIG_COMEDI=m, COMEDI_ISA_DRIVERS=y, CONFIG_COMEDI_DT282X=m

Patch is against 3.19.0-rc7 (localversion = -next-20150204)

 drivers/staging/comedi/drivers/dt282x.c |    9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/staging/comedi/drivers/dt282x.c b/drivers/staging/comedi/drivers/dt282x.c
index 051dfb2..db21d21 100644
--- a/drivers/staging/comedi/drivers/dt282x.c
+++ b/drivers/staging/comedi/drivers/dt282x.c
@@ -685,14 +685,7 @@ static int dt282x_ai_cmdtest(struct comedi_device *dev,
 
 	err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
 
-	if (cmd->scan_begin_src == TRIG_FOLLOW) {
-		/* internal trigger */
-		err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
-	} else {
-		/* external trigger */
-		/* should be level/edge, hi/lo specification here */
-		err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
-	}
+	err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
 
 	err |= cfc_check_trigger_arg_min(&cmd->convert_arg, 4000);
 
-- 
1.7.10.4

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