Messages in this thread | | | Date | Mon, 25 Apr 2022 19:21:59 +0200 | From | Uwe Kleine-König <> | Subject | Re: [PATCH v2] macintosh: macio_asic: fix resource_size.cocci warnings |
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On Thu, Apr 21, 2022 at 07:18:07AM -0700, Yihao Han wrote: > drivers/macintosh/macio_asic.c:219:26-29: WARNING:Suspicious code. resource_size is maybe missing with res > drivers/macintosh/macio_asic.c:221:26-29: WARNING:Suspicious code. resource_size is maybe missing with res > > Use resource_size function on resource object instead of > explicit computation. > > Generated by: scripts/coccinelle/api/resource_size.cocci > > Signed-off-by: Yihao Han <hanyihao@vivo.com> > --- > v2: drop parenthesis around resource_size(res) and edit commit message > --- > drivers/macintosh/macio_asic.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c > index 1943a007e2d5..260fccb3863e 100644 > --- a/drivers/macintosh/macio_asic.c > +++ b/drivers/macintosh/macio_asic.c > @@ -216,9 +216,9 @@ static int macio_resource_quirks(struct device_node *np, struct resource *res, > /* Some older IDE resources have bogus sizes */ > if (of_node_name_eq(np, "IDE") || of_node_name_eq(np, "ATA") || > of_node_is_type(np, "ide") || of_node_is_type(np, "ata")) { > - if (index == 0 && (res->end - res->start) > 0xfff) > + if (index == 0 && resource_size(res) > 0xfff)
Michael Ellerman noted in the v1 thread, that this is wrong as resource_size evaluates to end - start + 1. So this has to be
if (index == 0 && resource_size(res) > 0x1000)
to be equivalent.
> res->end = res->start + 0xfff; > - if (index == 1 && (res->end - res->start) > 0xff) > + if (index == 1 && resource_size(res) > 0xff)
Similar here.
Best regards Uwe
-- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | https://www.pengutronix.de/ | [unhandled content-type:application/pgp-signature] | |