* [PATCH] ASoC: Intel: fix ifnullfree.cocci warnings [not found] <201504130318.BufQJB8v%fengguang.wu@intel.com> @ 2015-04-12 19:06 ` kbuild test robot 2015-04-13 1:03 ` [alsa-devel] " Jin, Yao 0 siblings, 1 reply; 4+ messages in thread From: kbuild test robot @ 2015-04-12 19:06 UTC (permalink / raw) To: Jin Yao Cc: kbuild-all, Mark Brown, Liam Girdwood, Jaroslav Kysela, Takashi Iwai, Jie Yang, alsa-devel, linux-kernel sound/soc/intel/common/sst-ipc.c:287:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values. NULL check before some freeing functions is not needed. Based on checkpatch warning "kfree(NULL) is safe this check is probably not required" and kfreeaddr.cocci by Julia Lawall. Generated by: scripts/coccinelle/free/ifnullfree.cocci CC: Jin Yao <yao.jin@linux.intel.com> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> --- sst-ipc.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/sound/soc/intel/common/sst-ipc.c +++ b/sound/soc/intel/common/sst-ipc.c @@ -283,8 +283,7 @@ void sst_ipc_fini(struct sst_generic_ipc if (ipc->tx_thread) kthread_stop(ipc->tx_thread); - if (ipc->msg) - kfree(ipc->msg); + kfree(ipc->msg); } EXPORT_SYMBOL_GPL(sst_ipc_fini); ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [alsa-devel] [PATCH] ASoC: Intel: fix ifnullfree.cocci warnings 2015-04-12 19:06 ` [PATCH] ASoC: Intel: fix ifnullfree.cocci warnings kbuild test robot @ 2015-04-13 1:03 ` Jin, Yao 2015-04-13 10:38 ` Mark Brown 0 siblings, 1 reply; 4+ messages in thread From: Jin, Yao @ 2015-04-13 1:03 UTC (permalink / raw) To: kbuild test robot Cc: alsa-devel, Takashi Iwai, linux-kernel, Liam Girdwood, Mark Brown, kbuild-all The NULL check here is to proivde the protection for current code and future potential code. It's possible that in future some code may change the pointer ipc->msg and the author may miss the kfree here. But anyway I'm ok if removing null check is the coding philosophy we need to follow. Thanks JIn Yao On 2015/4/13 3:06, kbuild test robot wrote: > sound/soc/intel/common/sst-ipc.c:287:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values. > > NULL check before some freeing functions is not needed. > > Based on checkpatch warning > "kfree(NULL) is safe this check is probably not required" > and kfreeaddr.cocci by Julia Lawall. > > Generated by: scripts/coccinelle/free/ifnullfree.cocci > > CC: Jin Yao <yao.jin@linux.intel.com> > Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> > --- > > sst-ipc.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > --- a/sound/soc/intel/common/sst-ipc.c > +++ b/sound/soc/intel/common/sst-ipc.c > @@ -283,8 +283,7 @@ void sst_ipc_fini(struct sst_generic_ipc > if (ipc->tx_thread) > kthread_stop(ipc->tx_thread); > > - if (ipc->msg) > - kfree(ipc->msg); > + kfree(ipc->msg); > } > EXPORT_SYMBOL_GPL(sst_ipc_fini); > > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@alsa-project.org > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [alsa-devel] [PATCH] ASoC: Intel: fix ifnullfree.cocci warnings 2015-04-13 1:03 ` [alsa-devel] " Jin, Yao @ 2015-04-13 10:38 ` Mark Brown 0 siblings, 0 replies; 4+ messages in thread From: Mark Brown @ 2015-04-13 10:38 UTC (permalink / raw) To: Jin, Yao Cc: kbuild test robot, alsa-devel, Takashi Iwai, linux-kernel, Liam Girdwood, kbuild-all [-- Attachment #1: Type: text/plain, Size: 385 bytes --] On Mon, Apr 13, 2015 at 09:03:39AM +0800, Jin, Yao wrote: > The NULL check here is to proivde the protection for current code and > future potential code. It's possible that in future some code may > change the pointer ipc->msg and the author may miss the kfree here. That's not the point - the point is that if it's ever valid to call kfree() then passing a null pointer in is fine. [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 473 bytes --] ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] ASoC: Intel: fix ifnullfree.cocci warnings @ 2015-04-13 10:38 ` Mark Brown 0 siblings, 0 replies; 4+ messages in thread From: Mark Brown @ 2015-04-13 10:38 UTC (permalink / raw) To: Jin, Yao Cc: alsa-devel, Takashi Iwai, linux-kernel, Liam Girdwood, kbuild-all, kbuild test robot [-- Attachment #1.1: Type: text/plain, Size: 385 bytes --] On Mon, Apr 13, 2015 at 09:03:39AM +0800, Jin, Yao wrote: > The NULL check here is to proivde the protection for current code and > future potential code. It's possible that in future some code may > change the pointer ipc->msg and the author may miss the kfree here. That's not the point - the point is that if it's ever valid to call kfree() then passing a null pointer in is fine. [-- Attachment #1.2: Digital signature --] [-- Type: application/pgp-signature, Size: 473 bytes --] [-- Attachment #2: Type: text/plain, Size: 0 bytes --] ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2015-04-13 10:38 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [not found] <201504130318.BufQJB8v%fengguang.wu@intel.com> 2015-04-12 19:06 ` [PATCH] ASoC: Intel: fix ifnullfree.cocci warnings kbuild test robot 2015-04-13 1:03 ` [alsa-devel] " Jin, Yao 2015-04-13 10:38 ` Mark Brown 2015-04-13 10:38 ` Mark Brown
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