From: Julia Lawall <julia@diku.dk>
To: Lonnie Mendez <dignome@gmail.com>,
Greg Kroah-Hartman <gregkh@suse.de>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: [PATCH 7/9] drivers/usb/serial: Eliminate useless code
Date: Sat, 16 Jan 2010 16:59:51 +0100 (CET) [thread overview]
Message-ID: <Pine.LNX.4.64.1001161659230.28745@ask.diku.dk> (raw)
From: Julia Lawall <julia@diku.dk>
The variables priv and portdata are initialized twice to the same (side
effect-free) expressions. Drop one initialization in each case.
A simplified version of the semantic match that finds this problem is:
(http://coccinelle.lip6.fr/)
// <smpl>
@forall@
idexpression *x;
identifier f!=ERR_PTR;
@@
x = f(...)
... when != x
(
x = f(...,<+...x...+>,...)
|
* x = f(...)
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
---
drivers/usb/serial/cypress_m8.c | 1 -
drivers/usb/serial/sierra.c | 2 +-
2 files changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index 60c2002..9b96c08 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -687,7 +687,6 @@ static void cypress_dtr_rts(struct usb_serial_port *port, int on)
{
struct cypress_private *priv = usb_get_serial_port_data(port);
/* drop dtr and rts */
- priv = usb_get_serial_port_data(port);
spin_lock_irq(&priv->lock);
if (on == 0)
priv->line_control = 0;
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index ac1b644..83a7f49 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -476,7 +476,7 @@ static void sierra_outdat_callback(struct urb *urb)
static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
const unsigned char *buf, int count)
{
- struct sierra_port_private *portdata = usb_get_serial_port_data(port);
+ struct sierra_port_private *portdata;
struct sierra_intf_private *intfdata;
struct usb_serial *serial = port->serial;
unsigned long flags;
reply other threads:[~2010-01-16 15:59 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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