Re: [PATCH 19/20] staging: lustre: ptlrpc: sec_plain: remove unneeded null test before free

[walter harms]

Am 01.05.2015 21:37, schrieb Julia Lawall:
> Kfree can cope with a null argument, so drop null tests.
> 
> The semantic patch that makes this change is as follows:
> (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@ expression ptr; @@
> 
> - if (ptr != NULL)
>   kfree(ptr);
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxx>
> 
> ---
>  drivers/staging/lustre/lustre/ptlrpc/sec_plain.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c b/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c
> index 604e511..989cdcd 100644
> --- a/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c
> +++ b/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c
> @@ -384,8 +384,7 @@ struct ptlrpc_cli_ctx *plain_sec_install_ctx(struct plain_sec *plsec)
>  	if (ctx) {
>  		atomic_inc(&ctx->cc_refcount);
>  
> -		if (ctx_new)
> -			kfree(ctx_new);
> +		kfree(ctx_new);
>  	} else if (ctx_new) {
>  		ctx = ctx_new;
>  

The error handling here is not obvious
the
OBD_ALLOC_PTR(ctx_new);
should have something like
if (!ctx_new)
	return NULL;


just my 2 cents
re,
 wh

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