* [PATCH] mac80211: avoid uninitialized var warning in ieee80211_scan_cancel
@ 2010-10-06 20:42 John W. Linville
2010-10-07 6:15 ` Stanislaw Gruszka
0 siblings, 1 reply; 3+ messages in thread
From: John W. Linville @ 2010-10-06 20:42 UTC (permalink / raw)
To: linux-wireless; +Cc: sgruszka, johannes, John W. Linville
net/mac80211/scan.c: In function ‘ieee80211_scan_cancel’:
net/mac80211/scan.c:794: warning: ‘finish’ may be used uninitialized in this function
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
net/mac80211/scan.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 80e017d..523db93 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -791,7 +791,8 @@ int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
*/
void ieee80211_scan_cancel(struct ieee80211_local *local)
{
- bool abortscan, finish;
+ bool abortscan;
+ bool finish = false;
/*
* We are only canceling software scan, or deferred scan that was not
@@ -818,7 +819,7 @@ void ieee80211_scan_cancel(struct ieee80211_local *local)
if (abortscan) {
/* The scan is canceled, but stop work from being pending */
cancel_delayed_work_sync(&local->scan_work);
- if (finish)
- __ieee80211_scan_completed_finish(&local->hw, false);
}
+ if (finish)
+ __ieee80211_scan_completed_finish(&local->hw, false);
}
--
1.7.2.3
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] mac80211: avoid uninitialized var warning in ieee80211_scan_cancel
2010-10-06 20:42 [PATCH] mac80211: avoid uninitialized var warning in ieee80211_scan_cancel John W. Linville
@ 2010-10-07 6:15 ` Stanislaw Gruszka
2010-10-07 13:06 ` John W. Linville
0 siblings, 1 reply; 3+ messages in thread
From: Stanislaw Gruszka @ 2010-10-07 6:15 UTC (permalink / raw)
To: John W. Linville; +Cc: linux-wireless, johannes
On Wed, Oct 06, 2010 at 04:42:23PM -0400, John W. Linville wrote:
> net/mac80211/scan.c: In function ‘ieee80211_scan_cancel’:
> net/mac80211/scan.c:794: warning: ‘finish’ may be used uninitialized in this function
>
> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Hi John
What compiler are you using? I have no warning with gcc 4.4.4 from RHEL6.
That's correct, as "finish" variable can not be uninitialized, because is used
only when abortscan == true;
> + bool finish = false;
>
> /*
> * We are only canceling software scan, or deferred scan that was not
> @@ -818,7 +819,7 @@ void ieee80211_scan_cancel(struct ieee80211_local *local)
> if (abortscan) {
> /* The scan is canceled, but stop work from being pending */
> cancel_delayed_work_sync(&local->scan_work);
> - if (finish)
> - __ieee80211_scan_completed_finish(&local->hw, false);
> }
> + if (finish)
> + __ieee80211_scan_completed_finish(&local->hw, false);
> }
I have nothing against the patch, but this seems to be compiler problem,
not our code.
Stanislaw
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] mac80211: avoid uninitialized var warning in ieee80211_scan_cancel
2010-10-07 6:15 ` Stanislaw Gruszka
@ 2010-10-07 13:06 ` John W. Linville
0 siblings, 0 replies; 3+ messages in thread
From: John W. Linville @ 2010-10-07 13:06 UTC (permalink / raw)
To: Stanislaw Gruszka; +Cc: linux-wireless, johannes
On Thu, Oct 07, 2010 at 08:15:16AM +0200, Stanislaw Gruszka wrote:
> On Wed, Oct 06, 2010 at 04:42:23PM -0400, John W. Linville wrote:
> > net/mac80211/scan.c: In function ‘ieee80211_scan_cancel’:
> > net/mac80211/scan.c:794: warning: ‘finish’ may be used uninitialized in this function
> >
> > Signed-off-by: John W. Linville <linville@tuxdriver.com>
>
> Hi John
>
> What compiler are you using? I have no warning with gcc 4.4.4 from RHEL6.
> That's correct, as "finish" variable can not be uninitialized, because is used
> only when abortscan == true;
[linville-8530p.local]:> gcc -v
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared
--enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk --disable-dssi --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre --enable-libgcj-multifile
--enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib --with-ppl --with-cloog --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.4.4 20100630 (Red Hat 4.4.4-10) (GCC)
/home/linville
[linville-8530p.local]:> cat /etc/redhat-release
Fedora release 13 (Goddard)
> > + bool finish = false;
> >
> > /*
> > * We are only canceling software scan, or deferred scan that was not
> > @@ -818,7 +819,7 @@ void ieee80211_scan_cancel(struct ieee80211_local *local)
> > if (abortscan) {
> > /* The scan is canceled, but stop work from being pending */
> > cancel_delayed_work_sync(&local->scan_work);
> > - if (finish)
> > - __ieee80211_scan_completed_finish(&local->hw, false);
> > }
> > + if (finish)
> > + __ieee80211_scan_completed_finish(&local->hw, false);
> > }
>
> I have nothing against the patch, but this seems to be compiler problem,
> not our code.
I'd rather just avoid the warning spam. :-)
--
John W. Linville Someday the world will need a hero, and you
linville@tuxdriver.com might be all we have. Be ready.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-10-06 20:42 [PATCH] mac80211: avoid uninitialized var warning in ieee80211_scan_cancel John W. Linville
2010-10-07 6:15 ` Stanislaw Gruszka
2010-10-07 13:06 ` John W. Linville
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