[PATCH] cxl: Destroy cxl_adapter_idr on module_exit

[PATCH] cxl: Destroy cxl_adapter_idr on module_exit

[Johannes Thumshirn]

Destroy cxl_adapter_idr on module exit, reclaiming the allocated memory.

This was detected by the following semantic patch (written by Luis Rodriguez
<mcgrof@suse.com>)
<SmPL>
@ defines_module_init @
declarer name module_init, module_exit;
declarer name DEFINE_IDR;
identifier init;
@@

module_init(init);

@ defines_module_exit @
identifier exit;
@@

module_exit(exit);

@ declares_idr depends on defines_module_init && defines_module_exit @
identifier idr;
@@

DEFINE_IDR(idr);

@ on_exit_calls_destroy depends on declares_idr && defines_module_exit @
identifier declares_idr.idr, defines_module_exit.exit;
@@

exit(void)
{
 ...
 idr_destroy(&idr);
 ...
}

@ missing_module_idr_destroy depends on declares_idr && defines_module_exit && !on_exit_calls_destroy @
identifier declares_idr.idr, defines_module_exit.exit;
@@

exit(void)
{
 ...
 +idr_destroy(&idr);
}
</SmPL>

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
---
 drivers/misc/cxl/main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c
index 833348e..4e58e0b 100644
--- a/drivers/misc/cxl/main.c
+++ b/drivers/misc/cxl/main.c
@@ -222,6 +222,7 @@ static void exit_cxl(void)
 	cxl_debugfs_exit();
 	cxl_file_exit();
 	unregister_cxl_calls(&cxl_calls);
+	idr_destroy(&cxl_adapter_idr);
 }
 
 module_init(init_cxl);
-- 
2.4.3

Re: [PATCH] cxl: Destroy cxl_adapter_idr on module_exit

[Ian Munsie]

Acked-by: Ian Munsie <imunsie@au1.ibm.com>

We are probably also missing an idr_destroy(&afu->contexts_idr); in
cxl_release_afu() as well if you wanted to send a patch for that.

Cheers,
-Ian

Re: [PATCH] cxl: Destroy cxl_adapter_idr on module_exit

[Johannes Thumshirn]

Ian Munsie <imunsie@au1.ibm.com> writes:

> Acked-by: Ian Munsie <imunsie@au1.ibm.com>
>
> We are probably also missing an idr_destroy(&afu->contexts_idr); in
> cxl_release_afu() as well if you wanted to send a patch for that.
>
> Cheers,
> -Ian
>

Correct, patch is going out today. Thanks for the hint.

--=20
Johannes Thumshirn                                       Storage
jthumshirn@suse.de                             +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N=C3=BCrnberg
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HRB 21284 (AG N=C3=BCrnberg)

Re: cxl: Destroy cxl_adapter_idr on module_exit

[Michael Ellerman]

On Wed, 2015-08-07 at 15:14:36 UTC, Johannes Thumshirn wrote:
> Destroy cxl_adapter_idr on module exit, reclaiming the allocated memory.
> 
> Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
> Acked-by: Ian Munsie <imunsie@au1.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/b2a02ac65e40fb3900d1

cheers