[PATCH] IB/mad: fix ifnullfree.cocci warnings

[PATCH] IB/mad: fix ifnullfree.cocci warnings

[kbuild test robot]

drivers/infiniband/core/mad.c:2088:3-8: 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

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---

 mad.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/infiniband/core/mad.c
+++ b/drivers/infiniband/core/mad.c
@@ -2084,8 +2084,7 @@ out:
 	/* Post another receive request for this QP */
 	if (response) {
 		ib_mad_post_receive_mads(qp_info, response);
-		if (recv)
-			kfree(recv);
+		kfree(recv);
 	} else
 		ib_mad_post_receive_mads(qp_info, recv);
 }

RE: [PATCH] IB/mad: fix ifnullfree.cocci warnings

[Weiny, Ira]

> -----Original Message-----
> From: Wu, Fengguang
> Sent: Tuesday, January 27, 2015 1:36 PM
> To: Weiny, Ira
> Cc: kbuild-all@01.org; Roland Dreier; Hefty, Sean; Hal Rosenstock; Or Gerlitz;
> Yan Burman; linux-rdma@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: [PATCH] IB/mad: fix ifnullfree.cocci warnings
> 
> drivers/infiniband/core/mad.c:2088:3-8: 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
> 
> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>


Signed-off-by: Ira Weiny <ira.weiny@intel.com>


> ---
> 
>  mad.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> --- a/drivers/infiniband/core/mad.c
> +++ b/drivers/infiniband/core/mad.c
> @@ -2084,8 +2084,7 @@ out:
>  	/* Post another receive request for this QP */
>  	if (response) {
>  		ib_mad_post_receive_mads(qp_info, response);
> -		if (recv)
> -			kfree(recv);
> +		kfree(recv);
>  	} else
>  		ib_mad_post_receive_mads(qp_info, recv);  }

RE: [PATCH] IB/mad: fix ifnullfree.cocci warnings

[Weiny, Ira]

> >
> > drivers/infiniband/core/mad.c:2088:3-8: 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
> >
> > Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
> 
> 
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>

Sorry this should have been:

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>


> 
> 
> > ---
> >
> >  mad.c |    3 +--
> >  1 file changed, 1 insertion(+), 2 deletions(-)
> >
> > --- a/drivers/infiniband/core/mad.c
> > +++ b/drivers/infiniband/core/mad.c
> > @@ -2084,8 +2084,7 @@ out:
> >  	/* Post another receive request for this QP */
> >  	if (response) {
> >  		ib_mad_post_receive_mads(qp_info, response);
> > -		if (recv)
> > -			kfree(recv);
> > +		kfree(recv);
> >  	} else
> >  		ib_mad_post_receive_mads(qp_info, recv);  }
> --
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