linux-kernel - [PATCH v2 10/22] interconnect: Relax requirement in of_icc_get_from

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: <20200330010904.27643-11-digetx@gmail.com>
Date:   Mon, 30 Mar 2020 04:08:52 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Artur Świgoń <a.swigon@...sung.com>,
        Georgi Djakov <georgi.djakov@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org
Subject: [PATCH v2 10/22] interconnect: Relax requirement in of_icc_get_from_provider()

From: Artur Świgoń <a.swigon@...sung.com>

This patch relaxes the condition in of_icc_get_from_provider() so that it
is no longer required to set #interconnect-cells = <1> in the DT. In case
of the devfreq driver for exynos-bus, #interconnect-cells is always zero.

Signed-off-by: Artur Świgoń <a.swigon@...sung.com>
[digetx@...il.com: added cells_num checking for of_icc_xlate_onecell()]
Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/interconnect/core.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index 2c6515e3ecf1..7d09656734c1 100644
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -335,7 +335,7 @@ static struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec)
 	struct icc_node *node = ERR_PTR(-EPROBE_DEFER);
 	struct icc_provider *provider;
 
-	if (!spec || spec->args_count != 1)
+	if (!spec)
 		return ERR_PTR(-EINVAL);
 
 	mutex_lock(&icc_lock);
@@ -851,6 +851,15 @@ EXPORT_SYMBOL_GPL(icc_nodes_remove);
  */
 int icc_provider_add(struct icc_provider *provider)
 {
+	struct device_node *np = provider->dev->of_node;
+	u32 cells_num;
+	int err;
+
+	err = of_property_read_u32(np, "#interconnect-cells", &cells_num);
+	if (WARN_ON(err))
+		return err;
+	if (WARN_ON(provider->xlate == of_icc_xlate_onecell && cells_num != 1))
+		return -EINVAL;
 	if (WARN_ON(!provider->set))
 		return -EINVAL;
 	if (WARN_ON(!provider->xlate))
-- 
2.25.1