linux-kernel - [PATCH v2 1/2] Staging: comedi: comedi_fops: Change comedi_num_legacy

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Message-Id: <cd5f3e9f6320ac0063e61f0d0457e5400091390c.1488908538.git.thrust73@gmail.com>
Date:   Wed,  8 Mar 2017 02:13:58 +0800
From:   Cheah Kok Cheong <thrust73@...il.com>
To:     abbotti@....co.uk, hsweeten@...ionengravers.com,
        gregkh@...uxfoundation.org, devel@...verdev.osuosl.org
Cc:     linux-kernel@...r.kernel.org, Cheah Kok Cheong <thrust73@...il.com>
Subject: [PATCH v2 1/2] Staging: comedi: comedi_fops: Change comedi_num_legacy_minors type

Change to unsigned to allow removal of negative value check in
init section. Use smaller data type since the max possible
value currently is 48.

Signed-off-by: Cheah Kok Cheong <thrust73@...il.com>
---

V2:
-No changes.

 drivers/staging/comedi/comedi_fops.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index 57e8599..354d264 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -76,8 +76,8 @@ struct comedi_file {
 #define COMEDI_NUM_SUBDEVICE_MINORS	\
 	(COMEDI_NUM_MINORS - COMEDI_NUM_BOARD_MINORS)
 
-static int comedi_num_legacy_minors;
-module_param(comedi_num_legacy_minors, int, 0444);
+static unsigned short comedi_num_legacy_minors;
+module_param(comedi_num_legacy_minors, ushort, 0444);
 MODULE_PARM_DESC(comedi_num_legacy_minors,
 		 "number of comedi minor devices to reserve for non-auto-configured devices (default 0)"
 		);
@@ -2857,8 +2857,7 @@ static int __init comedi_init(void)
 
 	pr_info("version " COMEDI_RELEASE " - http://www.comedi.org\n");
 
-	if (comedi_num_legacy_minors < 0 ||
-	    comedi_num_legacy_minors > COMEDI_NUM_BOARD_MINORS) {
+	if (comedi_num_legacy_minors > COMEDI_NUM_BOARD_MINORS) {
 		pr_err("invalid value for module parameter \"comedi_num_legacy_minors\".  Valid values are 0 through %i.\n",
 		       COMEDI_NUM_BOARD_MINORS);
 		return -EINVAL;
-- 
2.7.4