linux-kernel - [PATCH 2/3] drivers/char/dsp56k.c: drop check for negativity of unsigned parameter

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Message-Id: <1405599533-11374-1-git-send-email-andrey.krieger.utkin@gmail.com>
Date:	Thu, 17 Jul 2014 15:18:53 +0300
From:	Andrey Utkin <andrey.krieger.utkin@...il.com>
To:	kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	dcb314@...mail.com, arnd@...db.de, gregkh@...uxfoundation.org,
	Andrey Utkin <andrey.krieger.utkin@...il.com>
Subject: [PATCH 2/3] drivers/char/dsp56k.c: drop check for negativity of unsigned parameter

[linux-3.16-rc5/drivers/char/dsp56k.c:386]: (style) Checking if unsigned
variable 'arg' is less than zero.

Source code is

            if (arg > 31 || arg < 0)
                return -EINVAL;

But

static long dsp56k_ioctl(struct file *file, unsigned int cmd,
             unsigned long arg)

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=80411
Reported-by: David Binderman <dcb314@...mail.com>
Signed-off-by: Andrey Utkin <andrey.krieger.utkin@...il.com>
---
 drivers/char/dsp56k.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/dsp56k.c b/drivers/char/dsp56k.c
index 01a5ca7..8bf70e8 100644
--- a/drivers/char/dsp56k.c
+++ b/drivers/char/dsp56k.c
@@ -383,7 +383,7 @@ static long dsp56k_ioctl(struct file *file, unsigned int cmd,
 			return put_user(status, &hf->status);
 		}
 		case DSP56K_HOST_CMD:
-			if (arg > 31 || arg < 0)
+			if (arg > 31)
 				return -EINVAL;
 			mutex_lock(&dsp56k_mutex);
 			dsp56k_host_interface.cvr = (u_char)((arg & DSP56K_CVR_HV_MASK) |
-- 
1.8.5.5

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