linux-kernel - [PATCH] macintosh: macio_asic: fix resource

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Date:   Thu, 14 Apr 2022 07:02:42 -0700
From:   Yihao Han <hanyihao@...o.com>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        William Breathitt Gray <vilhelm.gray@...il.com>,
        Sven Van Asbroeck <TheSven73@...il.com>,
        Corentin Labbe <clabbe@...libre.com>,
        Yihao Han <hanyihao@...o.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Cc:     kernel@...o.com
Subject: [PATCH] macintosh: macio_asic: fix resource_size.cocci warnings

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@...o.com>
---
 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)
 			res->end = res->start + 0xfff;
-		if (index == 1 && (res->end - res->start) > 0xff)
+		if (index == 1 && (resource_size(res)) > 0xff)
 			res->end = res->start + 0xff;
 	}
 	return 0;
-- 
2.17.1