Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
ACPI: LPIT: move to use bus_get_dev_root()
Direct access to the struct bus_type dev_root pointer is going away soon
so replace that with a call to bus_get_dev_root() instead, which is what
it is there for.
Cc: Len Brown <lenb@kernel.org>
Cc: linux-acpi@vger.kernel.org
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20230322083646.2937580-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+11
-5
+11
-5
drivers/acpi/acpi_lpit.c
+11
-5
drivers/acpi/acpi_lpit.c
···
98
98
static void lpit_update_residency(struct lpit_residency_info *info,
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99
struct acpi_lpit_native *lpit_native)
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{
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+
struct device *dev_root = bus_get_dev_root(&cpu_subsys);
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+
103
+
/* Silently fail, if cpuidle attribute group is not present */
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+
if (!dev_root)
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+
return;
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+
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info->frequency = lpit_native->counter_frequency ?
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lpit_native->counter_frequency : tsc_khz * 1000;
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if (!info->frequency)
···
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108
info->iomem_addr = ioremap(info->gaddr.address,
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info->gaddr.bit_width / 8);
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if (!info->iomem_addr)
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-
return;
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+
goto exit;
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112
119
-
/* Silently fail, if cpuidle attribute group is not present */
120
-
sysfs_add_file_to_group(&cpu_subsys.dev_root->kobj,
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+
sysfs_add_file_to_group(&dev_root->kobj,
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&dev_attr_low_power_idle_system_residency_us.attr,
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"cpuidle");
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} else if (info->gaddr.space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) {
124
-
/* Silently fail, if cpuidle attribute group is not present */
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-
sysfs_add_file_to_group(&cpu_subsys.dev_root->kobj,
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+
sysfs_add_file_to_group(&dev_root->kobj,
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&dev_attr_low_power_idle_cpu_residency_us.attr,
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"cpuidle");
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120
}
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+
exit:
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+
put_device(dev_root);
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123
}
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static void lpit_process(u64 begin, u64 end)