Am 19.05.2014 13:30, schrieb Julia Lawall:

On Mon, 19 May 2014, walter harms wrote:

quoted

Am 19.05.2014 06:31, schrieb Julia Lawall:

quoted

From: Julia Lawall <redacted>

Delete unnecessary local variable whose value is always 0 and that hides
the fact that the result is always 0.

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

// <smpl>
@r exists@
local idexpression ret;
expression e;
position p;
@@

-ret = 0;
... when != ret = e
return
- ret
+ 0
  ;
// </smpl>

Signed-off-by: Julia Lawall <redacted>

---
Alternatively, is an error code wanted under the if?

 drivers/net/wimax/i2400m/driver.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wimax/i2400m/driver.c b/drivers/net/wimax/i2400m/driver.c
index 9c34d2f..901a534 100644
--- a/drivers/net/wimax/i2400m/driver.c
+++ b/drivers/net/wimax/i2400m/driver.c

@@ -500,26 +500,23 @@ int i2400m_pm_notifier(struct notifier_block *notifier,
  */
 int i2400m_pre_reset(struct i2400m *i2400m)
 {
-	int result;
 	struct device *dev = i2400m_dev(i2400m);

 	d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
 	d_printf(1, dev, "pre-reset shut down\n");

-	result = 0;
 	mutex_lock(&i2400m->init_mutex);
 	if (i2400m->updown) {
 		netif_tx_disable(i2400m->wimax_dev.net_dev);
 		__i2400m_dev_stop(i2400m);
-		result = 0;
 		/* down't set updown to zero -- this way
 		 * post_reset can restore properly */
 	}
 	mutex_unlock(&i2400m->init_mutex);
 	if (i2400m->bus_release)
 		i2400m->bus_release(i2400m);
-	d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
-	return result;
+	d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, 0);

	d_fnend(3, dev, "i2400m=%p\n", i2400m);

All the other logging messages in this file seem to have the form
(i2400m %p) = %d
or (i2400m %p) = void in the case of a function that has no return value.
I don't know if a return value is wanted here, but since the function is
exported, perhaps it is best not to change its type.

I got my "inspiration" from d_fnstart().
As i see it the whole function is void so printing a debug msg with a bogus
return value may confuse some people.

re,
 wh

julia

quoted

or something like that
re,
 wh

quoted

+	return 0;
 }
 EXPORT_SYMBOL_GPL(i2400m_pre_reset);


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