linux-kernel - Re: [PATCHv6 net-next 7/7] net: ibm: emac: use of_find_matching

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAKxU2N8cm_ku876uKcZmJKsXESM25z+xe9r0HqFWiuHGCP0cFQ@mail.gmail.com>
Date: Tue, 15 Oct 2024 12:45:38 -0700
From: Rosen Penev <rosenp@...il.com>
To: Simon Horman <horms@...nel.org>
Cc: netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Andrew Lunn <andrew@...n.ch>, Shannon Nelson <shannon.nelson@....com>, 
	Uwe Kleine-König <u.kleine-koenig@...libre.com>, 
	Breno Leitao <leitao@...ian.org>, Jeff Johnson <quic_jjohnson@...cinc.com>, 
	Christian Marangi <ansuelsmth@...il.com>, open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCHv6 net-next 7/7] net: ibm: emac: use of_find_matching_node

On Sat, Oct 12, 2024 at 6:21 AM Simon Horman <horms@...nel.org> wrote:
>
> On Fri, Oct 11, 2024 at 12:56:22PM -0700, Rosen Penev wrote:
> > Cleaner than using of_find_all_nodes and then of_match_node.
> >
> > Also modified EMAC_BOOT_LIST_SIZE check to run before of_node_get to
> > avoid having to call of_node_put on failure.
> >
> > Signed-off-by: Rosen Penev <rosenp@...il.com>
> > ---
> >  drivers/net/ethernet/ibm/emac/core.c | 10 +++-------
> >  1 file changed, 3 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c
> > index faa483790b29..5265616400c2 100644
> > --- a/drivers/net/ethernet/ibm/emac/core.c
> > +++ b/drivers/net/ethernet/ibm/emac/core.c
> > @@ -3253,21 +3253,17 @@ static void __init emac_make_bootlist(void)
> >       int cell_indices[EMAC_BOOT_LIST_SIZE];
> >
> >       /* Collect EMACs */
> > -     while((np = of_find_all_nodes(np)) != NULL) {
> > +     while((np = of_find_matching_node(np, emac_match))) {
> >               u32 idx;
> >
> > -             if (of_match_node(emac_match, np) == NULL)
> > -                     continue;
> >               if (of_property_read_bool(np, "unused"))
> >                       continue;
> >               if (of_property_read_u32(np, "cell-index", &idx))
> >                       continue;
> >               cell_indices[i] = idx;
> > -             emac_boot_list[i++] = of_node_get(np);
> > -             if (i >= EMAC_BOOT_LIST_SIZE) {
> > -                     of_node_put(np);
> > +             if (i >= EMAC_BOOT_LIST_SIZE)
> >                       break;
> > -             }
> > +             emac_boot_list[i++] = of_node_get(np);
>
> Reading the Kernel doc for of_find_matching_node() it seems
> that of_node_put() needs to called each time it (and thus
> of_find_matching_node() returns a np. But that doesn't seem
> to be the case here. Am I mistaken?
Bad change. Will remove.
>
>
> >       }
> >       max = i;
> >
> > --
> > 2.47.0
> >