[PATCH] c2port: Destroy c2port_idr on module exit

[Johannes Thumshirn]

Destroy c2port_idr on module exit, reclaiming the allocated memory.

This was detected by the following semantic patch (written by Luis Rodriguez
<mcgrof@xxxxxxxx>)
<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@xxxxxxx>
---
 drivers/misc/c2port/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/c2port/core.c b/drivers/misc/c2port/core.c
index 464419b..16f0116 100644
--- a/drivers/misc/c2port/core.c
+++ b/drivers/misc/c2port/core.c
@@ -999,6 +999,7 @@ static int __init c2port_init(void)
 static void __exit c2port_exit(void)
 {
 	class_destroy(c2port_class);
+	idr_destroy(&c2port_idr);
 }
 
 module_init(c2port_init);
-- 
2.4.3

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