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SubjectRe: [PATCH] x86/platform/olpc: remove duplicated check on node == -1
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Le 09/12/2018 à 16:01, Colin King a écrit :
> From: Colin Ian King <colin.king@canonical.com>
>
> Currently the node == -1 check is being performed twice, the
> second check is redundant and can be removed. Fix this by
> removing the redundant second check and moving the first check
> into a combined check with the result from the olpc_ofw call.
>
> Detected by cppcheck:
> Identical condition '(s32)node==-1', second condition is always false
>
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> arch/x86/platform/olpc/olpc_dt.c | 5 +----
> 1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/arch/x86/platform/olpc/olpc_dt.c b/arch/x86/platform/olpc/olpc_dt.c
> index b4ab779f1d47..658363ec3ff3 100644
> --- a/arch/x86/platform/olpc/olpc_dt.c
> +++ b/arch/x86/platform/olpc/olpc_dt.c
> @@ -28,10 +28,7 @@ static phandle __init olpc_dt_getsibling(phandle node)
> const void *args[] = { (void *)node };
> void *res[] = { &node };
>
> - if ((s32)node == -1)
> - return 0;
> -
> - if (olpc_ofw("peer", args, res) || (s32)node == -1)
> + if (((s32)node == -1) || olpc_ofw("peer", args, res))
> return 0;
>
> return node;

'res' is { &node }

Could 'node' be modified by 'olpc_ofw(..., res)' and set to -1?

In other words, I'm not sure that the 2nd check is a redundant here.

Just my 2c,

CJ

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