On Fri, Oct 25, 2024 at 12:32:27PM -0700, Rosen Penev wrote:
> On Fri, Oct 25, 2024 at 5:57 AM Simon Horman <ho...@kernel.org> wrote:
> >
> > On Thu, Oct 24, 2024 at 01:52:57PM -0700, Rosen Penev wrote:
> > > The latter is the preferred way to copy ethtool strings.
> > >
> > > Avoids manually incrementing the pointer. Cleans up the code quite well.
> > >
> > > Signed-off-by: Rosen Penev <ros...@gmail.com>
> >
> > ...
> >
> > > diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c
> > > b/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c
> > > index b0060cf96090..10c5fa4d23d2 100644
> > > --- a/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c
> > > +++ b/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c
> > > @@ -243,38 +243,24 @@ static void dpaa_get_ethtool_stats(struct
> > > net_device *net_dev,
> > > static void dpaa_get_strings(struct net_device *net_dev, u32 stringset,
> > > u8 *data)
> > > {
> > > - unsigned int i, j, num_cpus, size;
> > > - char string_cpu[ETH_GSTRING_LEN];
> > > - u8 *strings;
> > > + unsigned int i, j, num_cpus;
> > >
> > > - memset(string_cpu, 0, sizeof(string_cpu));
> > > - strings = data;
> > > - num_cpus = num_online_cpus();
> > > - size = DPAA_STATS_GLOBAL_LEN * ETH_GSTRING_LEN;
> > > + num_cpus = num_online_cpus();
> > >
> > > for (i = 0; i < DPAA_STATS_PERCPU_LEN; i++) {
> > > - for (j = 0; j < num_cpus; j++) {
> > > - snprintf(string_cpu, ETH_GSTRING_LEN, "%s [CPU %d]",
> > > - dpaa_stats_percpu[i], j);
> > > - memcpy(strings, string_cpu, ETH_GSTRING_LEN);
> > > - strings += ETH_GSTRING_LEN;
> > > - }
> > > - snprintf(string_cpu, ETH_GSTRING_LEN, "%s [TOTAL]",
> > > - dpaa_stats_percpu[i]);
> > > - memcpy(strings, string_cpu, ETH_GSTRING_LEN);
> > > - strings += ETH_GSTRING_LEN;
> > > - }
> > > - for (j = 0; j < num_cpus; j++) {
> > > - snprintf(string_cpu, ETH_GSTRING_LEN,
> > > - "bpool [CPU %d]", j);
> > > - memcpy(strings, string_cpu, ETH_GSTRING_LEN);
> > > - strings += ETH_GSTRING_LEN;
> > > + for (j = 0; j < num_cpus; j++)
> > > + ethtool_sprintf(&data, "%s [CPU %d]",
> > > + dpaa_stats_percpu[i], j);
> > > +
> > > + ethtool_sprintf(&data, "%s [TOTAL]", dpaa_stats_percpu[i]);
> > > }
> > > - snprintf(string_cpu, ETH_GSTRING_LEN, "bpool [TOTAL]");
> > > - memcpy(strings, string_cpu, ETH_GSTRING_LEN);
> > > - strings += ETH_GSTRING_LEN;
> > > + for (i = 0; j < num_cpus; i++)
> >
> > Perhaps this should consistently use i, rather than i and j:
> >
> > for (i = 0; i < num_cpus; i++)
> >
> > Flagged by W=1 builds with clang-18.
> I really need to compile test this on a PPC system.
Depending on your aims and hardware availability,
cross compiling may be easier.
But in any case, I don't think this problem relates to PPC.
> >
> > > + ethtool_sprintf(&data, "bpool [CPU %d]", i);
> > > +
> > > + ethtool_puts(&data, "bpool [TOTAL]");
> > >
> > > - memcpy(strings, dpaa_stats_global, size);
> > > + for (i = 0; i < DPAA_STATS_GLOBAL_LEN; i++)
> > > + ethtool_puts(&data, dpaa_stats_global[i]);
> > > }
> > >
> > > static int dpaa_get_hash_opts(struct net_device *dev,
> >
> > ...
>
