[PATCH 3/8] net/9p/trans_fd.c: Fix unsigned return type

[PATCH 3/8] net/9p/trans_fd.c: Fix unsigned return type

[Julia Lawall]

The function has an unsigned return type, but returns a negative constant
to indicate an error condition.  The result of calling the function is
always stored in a variable of type (signed) int, and thus unsigned can be
dropped from the return type.

A sematic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@exists@
identifier f;
constant C;
@@

 unsigned f(...)
 { <+...
*  return -C;
 ...+> }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>

---
 net/9p/trans_fd.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index c85109d..078eb16 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -222,7 +222,7 @@ static void p9_conn_cancel(struct p9_conn *m, int err)
 	}
 }
 
-static unsigned int
+static int
 p9_fd_poll(struct p9_client *client, struct poll_table_struct *pt)
 {
 	int ret, n;

[PATCH 5/8] drivers/atm/firestream.c: Fix unsigned return type

[Julia Lawall]

The function has an unsigned return type, but returns a negative constant
to indicate an error condition.  The result of calling the function is
always stored in a variable of type (signed) int, and thus unsigned can be
dropped from the return type.

A sematic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@exists@
identifier f;
constant C;
@@

 unsigned f(...)
 { <+...
*  return -C;
 ...+> }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>

---
 drivers/atm/firestream.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/atm/firestream.c b/drivers/atm/firestream.c
index 8717809..1af977e 100644
--- a/drivers/atm/firestream.c
+++ b/drivers/atm/firestream.c
@@ -444,8 +444,8 @@ static inline void fs_kfree_skb (struct sk_buff * skb)
 #define ROUND_NEAREST 3
 /********** make rate (not quite as much fun as Horizon) **********/
 
-static unsigned int make_rate (unsigned int rate, int r,
-			       u16 * bits, unsigned int * actual) 
+static int make_rate(unsigned int rate, int r,
+		      u16 *bits, unsigned int *actual)
 {
 	unsigned char exp = -1; /* hush gcc */
 	unsigned int man = -1;  /* hush gcc */

[PATCH 8/8] drivers/net/wireless/iwlwifi/iwl-agn.c: Fix return value from an unsigned function

[Julia Lawall]

The function has an unsigned return type, but returns a negative constant
to indicate an error condition.  Another error condition in the same
function is indicated by returning 0, and indeed the only call to the
function checks for 0 to detect errors, so the return of a negative value
it converted to a return of 0.

A sematic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@exists@
identifier f;
constant C;
@@

 unsigned f(...)
 { <+...
*  return -C;
 ...+> }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>

---
 drivers/net/wireless/iwlwifi/iwl-agn.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index ad0e67f..86b55c2 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -369,7 +369,7 @@ static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 
 	if (!priv->beacon_ctx) {
 		IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
-		return -EINVAL;
+		return 0;
 	}
 
 	/* Initialize memory */

Re: [PATCH 3/8] net/9p/trans_fd.c: Fix unsigned return type

[David Miller]

From: Julia Lawall <julia@diku.dk>
Date: Sun,  5 Sep 2010 21:00:21 +0200

> The function has an unsigned return type, but returns a negative constant
> to indicate an error condition.  The result of calling the function is
> always stored in a variable of type (signed) int, and thus unsigned can be
> dropped from the return type.
> 
> A sematic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
 ...
> Signed-off-by: Julia Lawall <julia@diku.dk>

Applied.

Re: [PATCH 5/8] drivers/atm/firestream.c: Fix unsigned return type

[David Miller]

From: Julia Lawall <julia@diku.dk>
Date: Sun,  5 Sep 2010 21:00:23 +0200

> The function has an unsigned return type, but returns a negative constant
> to indicate an error condition.  The result of calling the function is
> always stored in a variable of type (signed) int, and thus unsigned can be
> dropped from the return type.
> 
> A sematic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
...
> Signed-off-by: Julia Lawall <julia@diku.dk>

Applied.