linux-kernel - [PATCH] USB: serial: remove redundant initializations of 'mos

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Date:   Wed, 17 Jan 2018 11:54:27 +0000
From:   Colin King <colin.king@...onical.com>
To:     Johan Hovold <johan@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] USB: serial: remove redundant initializations of 'mos_parport'

From: Colin Ian King <colin.king@...onical.com>

The pointer mos_parport is being initialized to pp->private_data and
then the assignment is duplicated after a spin lock.  Remove the
initialization as it occurs before the spin lock and it is a redundant
assignment.

Cleans up clang warnings:
drivers/usb/serial/mos7720.c:521:26: warning: Value stored to
'mos_parport' during its initialization is never read
drivers/usb/serial/mos7720.c:557:26: warning: Value stored to
'mos_parport' during its initialization is never read

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/usb/serial/mos7720.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index f4df3d5bf69c..bd57630e67e2 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -518,7 +518,7 @@ static void parport_mos7715_write_control(struct parport *pp, unsigned char d)
 
 static unsigned char parport_mos7715_read_control(struct parport *pp)
 {
-	struct mos7715_parport *mos_parport = pp->private_data;
+	struct mos7715_parport *mos_parport;
 	__u8 dcr;
 
 	spin_lock(&release_lock);
@@ -554,7 +554,7 @@ static unsigned char parport_mos7715_frob_control(struct parport *pp,
 static unsigned char parport_mos7715_read_status(struct parport *pp)
 {
 	unsigned char status;
-	struct mos7715_parport *mos_parport = pp->private_data;
+	struct mos7715_parport *mos_parport;
 
 	spin_lock(&release_lock);
 	mos_parport = pp->private_data;
-- 
2.15.1