* [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.
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^ 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 --]
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[-- 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]
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[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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