Commit d2399501 authored by Marek Szyprowski's avatar Marek Szyprowski Committed by Viresh Kumar
Browse files

cpufreq: dt: always allocate zeroed cpumask 



Commit 0499a783 ("ARM64: Dynamically allocate cpumasks and increase
supported CPUs to 512") changed the handling of cpumasks on ARM 64bit,
what resulted in the strange issues and warnings during cpufreq-dt
initialization on some big.LITTLE platforms.

This was caused by mixing OPPs between big and LITTLE cores, because
OPP-sharing information between big and LITTLE cores is computed on
cpumask, which in turn was not zeroed on allocation. Fix this by
switching to zalloc_cpumask_var() call.

Fixes: dc279ac6 ("cpufreq: dt: Refactor initialization to handle probe deferral properly")
CC: stable@vger.kernel.org # v5.10+
Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: default avatarChristoph Lameter (Ampere) <cl@linux.com>
Reviewed-by: default avatarDhruva Gole <d-gole@ti.com>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent ad2a9108

drivers/cpufreq/cpufreq-dt.c

+1 −1
Original line number Diff line number Diff line
@@ -208,7 +208,7 @@ static int dt_cpufreq_early_init(struct device *dev, int cpu) 
	if (!priv)

		return -ENOMEM;



	if (!alloc_cpumask_var(&priv->cpus, GFP_KERNEL))

	if (!zalloc_cpumask_var(&priv->cpus, GFP_KERNEL))

		return -ENOMEM;



	cpumask_set_cpu(cpu, priv->cpus);