diff mbox

st: Destroy st_index_idr on module exit

Message ID 1436369041-31156-1-git-send-email-jthumshirn@suse.de (mailing list archive)
State New, archived
Headers show

Commit Message

Johannes Thumshirn July 8, 2015, 3:24 p.m. UTC
Destroy st_index_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/scsi/st.c | 1 +
 1 file changed, 1 insertion(+)

Comments

Hannes Reinecke July 10, 2015, 6:40 a.m. UTC | #1
On 07/08/2015 05:24 PM, Johannes Thumshirn wrote:
> Destroy st_index_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/scsi/st.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
> index 3f25b8f..79ac024 100644
> --- a/drivers/scsi/st.c
> +++ b/drivers/scsi/st.c
> @@ -4427,6 +4427,7 @@ static void __exit exit_st(void)
>  	unregister_chrdev_region(MKDEV(SCSI_TAPE_MAJOR, 0),
>  				 ST_MAX_TAPE_ENTRIES);
>  	class_unregister(&st_sysfs_class);
> +	idr_destroy(&st_index_idr);
>  	printk(KERN_INFO "st: Unloaded.\n");
>  }
>  
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
Kai Mäkisara July 10, 2015, 12:42 p.m. UTC | #2
> On 8.7.2015, at 18.24, Johannes Thumshirn <jthumshirn@suse.de> wrote:
> 
> Destroy st_index_idr on module exit, reclaiming the allocated memory.
> 
> This was detected by the following semantic patch (written by Luis Rodriguez
> <mcgrof@suse.com>)
> 
...
> 
> Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>

Acked-by: Kai Mäkisara <kai.makisara@kolumbus.fi>

Thanks,
Kai

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diff mbox

Patch

diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 3f25b8f..79ac024 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -4427,6 +4427,7 @@  static void __exit exit_st(void)
 	unregister_chrdev_region(MKDEV(SCSI_TAPE_MAJOR, 0),
 				 ST_MAX_TAPE_ENTRIES);
 	class_unregister(&st_sysfs_class);
+	idr_destroy(&st_index_idr);
 	printk(KERN_INFO "st: Unloaded.\n");
 }