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  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:   Mon, 17 Feb 2020 17:42:55 +0800
From:   Anson Huang <>
Subject: [PATCH] cpufreq: imx-cpufreq-dt: Add "cpu-supply" property check

The cpufreq-dt driver allows cpufreq driver enabled without valid
regulator assigned, however, all i.MX platforms using cpufreq-dt
driver now require valid regulator, add "cpu-supply" property check
to avoid i.MX platforms' cpufreq enabled without valid regulator
and lead to system unstable.

Signed-off-by: Anson Huang <>
 drivers/cpufreq/imx-cpufreq-dt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/cpufreq/imx-cpufreq-dt.c b/drivers/cpufreq/imx-cpufreq-dt.c
index 6cb8193..0e29d88 100644
--- a/drivers/cpufreq/imx-cpufreq-dt.c
+++ b/drivers/cpufreq/imx-cpufreq-dt.c
@@ -31,6 +31,9 @@ static int imx_cpufreq_dt_probe(struct platform_device *pdev)
 	int speed_grade, mkt_segment;
 	int ret;
+	if (!of_find_property(cpu_dev->of_node, "cpu-supply", NULL))
+		return -ENODEV;
 	ret = nvmem_cell_read_u32(cpu_dev, "speed_grade", &cell_value);
 	if (ret)
 		return ret;

Powered by blists - more mailing lists