linux-kernel - [PATCH] cpuidle: Use of_property_present() for testing DT property presence

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-next>] [day] [month] [year] [list]

Date:   Fri, 10 Mar 2023 08:47:03 -0600
From:   Rob Herring <robh@...nel.org>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Anup Patel <anup@...infault.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>
Cc:     devicetree@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: [PATCH] cpuidle: Use of_property_present() for testing DT property presence

It is preferred to use typed property access functions (i.e.
of_property_read_<type> functions) rather than low-level
of_get_property/of_find_property functions for reading properties. As
part of this, convert of_get_property/of_find_property calls to the
recently added of_property_present() helper when we just want to test
for presence of a property and nothing more.

Signed-off-by: Rob Herring <robh@...nel.org>
---
 drivers/cpuidle/cpuidle-psci-domain.c | 2 +-
 drivers/cpuidle/cpuidle-riscv-sbi.c   | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c
index 6ad2954948a5..e875ddadc51b 100644
--- a/drivers/cpuidle/cpuidle-psci-domain.c
+++ b/drivers/cpuidle/cpuidle-psci-domain.c
@@ -165,7 +165,7 @@ static int psci_cpuidle_domain_probe(struct platform_device *pdev)
 	 * initialize a genpd/genpd-of-provider pair when it's found.
 	 */
 	for_each_child_of_node(np, node) {
-		if (!of_find_property(node, "#power-domain-cells", NULL))
+		if (!of_property_present(node, "#power-domain-cells"))
 			continue;
 
 		ret = psci_pd_init(node, use_osi);
diff --git a/drivers/cpuidle/cpuidle-riscv-sbi.c b/drivers/cpuidle/cpuidle-riscv-sbi.c
index be383f4b6855..1fab1abc6eb6 100644
--- a/drivers/cpuidle/cpuidle-riscv-sbi.c
+++ b/drivers/cpuidle/cpuidle-riscv-sbi.c
@@ -497,7 +497,7 @@ static int sbi_genpd_probe(struct device_node *np)
 	 * initialize a genpd/genpd-of-provider pair when it's found.
 	 */
 	for_each_child_of_node(np, node) {
-		if (!of_find_property(node, "#power-domain-cells", NULL))
+		if (!of_property_present(node, "#power-domain-cells"))
 			continue;
 
 		ret = sbi_pd_init(node);
@@ -548,8 +548,8 @@ static int sbi_cpuidle_probe(struct platform_device *pdev)
 	for_each_possible_cpu(cpu) {
 		np = of_cpu_device_node_get(cpu);
 		if (np &&
-		    of_find_property(np, "power-domains", NULL) &&
-		    of_find_property(np, "power-domain-names", NULL)) {
+		    of_property_present(np, "power-domains") &&
+		    of_property_present(np, "power-domain-names")) {
 			continue;
 		} else {
 			sbi_cpuidle_use_osi = false;
-- 
2.39.2