Re: [PATCH] drivers/media/dvb-frontends/rtl2830.c: correct double assignment

2012-08-26 Thread Antti Palosaari

On 08/26/2012 07:15 PM, Julia Lawall wrote:

From: Julia Lawall 

The double assignment is meant to be a bit-or to combine two values.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// 
@@
expression i;
@@

*i = ...;
  i = ...;
// 

Signed-off-by: Julia Lawall 

---
  drivers/media/dvb-frontends/rtl2830.c |2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/dvb-frontends/rtl2830.c 
b/drivers/media/dvb-frontends/rtl2830.c
index 8fa8b08..b6ab858 100644
--- a/drivers/media/dvb-frontends/rtl2830.c
+++ b/drivers/media/dvb-frontends/rtl2830.c
@@ -254,7 +254,7 @@ static int rtl2830_init(struct dvb_frontend *fe)
goto err;

buf[0] = tmp << 6;
-   buf[0] = (if_ctl >> 16) & 0x3f;
+   buf[0] |= (if_ctl >> 16) & 0x3f;
buf[1] = (if_ctl >>  8) & 0xff;
buf[2] = (if_ctl >>  0) & 0xff;



Thank you!

Acked-by: Antti Palosaari 
Reviewed-by: Antti Palosaari 


Antti
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[PATCH] drivers/media/dvb-frontends/rtl2830.c: correct double assignment

2012-08-26 Thread Julia Lawall
From: Julia Lawall 

The double assignment is meant to be a bit-or to combine two values.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// 
@@
expression i;
@@

*i = ...;
 i = ...;
// 

Signed-off-by: Julia Lawall 

---
 drivers/media/dvb-frontends/rtl2830.c |2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/dvb-frontends/rtl2830.c 
b/drivers/media/dvb-frontends/rtl2830.c
index 8fa8b08..b6ab858 100644
--- a/drivers/media/dvb-frontends/rtl2830.c
+++ b/drivers/media/dvb-frontends/rtl2830.c
@@ -254,7 +254,7 @@ static int rtl2830_init(struct dvb_frontend *fe)
goto err;
 
buf[0] = tmp << 6;
-   buf[0] = (if_ctl >> 16) & 0x3f;
+   buf[0] |= (if_ctl >> 16) & 0x3f;
buf[1] = (if_ctl >>  8) & 0xff;
buf[2] = (if_ctl >>  0) & 0xff;
 

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[PATCH] drivers/media/dvb-frontends/rtl2830.c: correct double assignment

2012-08-26 Thread Julia Lawall
From: Julia Lawall julia.law...@lip6.fr

The double assignment is meant to be a bit-or to combine two values.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// smpl
@@
expression i;
@@

*i = ...;
 i = ...;
// /smpl

Signed-off-by: Julia Lawall julia.law...@lip6.fr

---
 drivers/media/dvb-frontends/rtl2830.c |2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/dvb-frontends/rtl2830.c 
b/drivers/media/dvb-frontends/rtl2830.c
index 8fa8b08..b6ab858 100644
--- a/drivers/media/dvb-frontends/rtl2830.c
+++ b/drivers/media/dvb-frontends/rtl2830.c
@@ -254,7 +254,7 @@ static int rtl2830_init(struct dvb_frontend *fe)
goto err;
 
buf[0] = tmp  6;
-   buf[0] = (if_ctl  16)  0x3f;
+   buf[0] |= (if_ctl  16)  0x3f;
buf[1] = (if_ctl   8)  0xff;
buf[2] = (if_ctl   0)  0xff;
 

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Re: [PATCH] drivers/media/dvb-frontends/rtl2830.c: correct double assignment

2012-08-26 Thread Antti Palosaari

On 08/26/2012 07:15 PM, Julia Lawall wrote:

From: Julia Lawall julia.law...@lip6.fr

The double assignment is meant to be a bit-or to combine two values.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// smpl
@@
expression i;
@@

*i = ...;
  i = ...;
// /smpl

Signed-off-by: Julia Lawall julia.law...@lip6.fr

---
  drivers/media/dvb-frontends/rtl2830.c |2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/dvb-frontends/rtl2830.c 
b/drivers/media/dvb-frontends/rtl2830.c
index 8fa8b08..b6ab858 100644
--- a/drivers/media/dvb-frontends/rtl2830.c
+++ b/drivers/media/dvb-frontends/rtl2830.c
@@ -254,7 +254,7 @@ static int rtl2830_init(struct dvb_frontend *fe)
goto err;

buf[0] = tmp  6;
-   buf[0] = (if_ctl  16)  0x3f;
+   buf[0] |= (if_ctl  16)  0x3f;
buf[1] = (if_ctl   8)  0xff;
buf[2] = (if_ctl   0)  0xff;



Thank you!

Acked-by: Antti Palosaari cr...@iki.fi
Reviewed-by: Antti Palosaari cr...@iki.fi


Antti
--
http://palosaari.fi/
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