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linux/drivers/platform
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Shouye Liu d211757918 platform/x86/intel-uncore-freq: Fix missing uncore sysfs during CPU hotplug 
commit 8d6955ed76 upstream.

In certain situations, the sysfs for uncore may not be present when all
CPUs in a package are offlined and then brought back online after boot.

This issue can occur if there is an error in adding the sysfs entry due
to a memory allocation failure. Retrying to bring the CPUs online will
not resolve the issue, as the uncore_cpu_mask is already set for the
package before the failure condition occurs.

This issue does not occur if the failure happens during module
initialization, as the module will fail to load in the event of any
error.

To address this, ensure that the uncore_cpu_mask is not set until the
successful return of uncore_freq_add_entry().

Fixes: dbce412a77 ("platform/x86/intel-uncore-freq: Split common and enumeration part")
Signed-off-by: Shouye Liu <shouyeliu@tencent.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20250417032321.75580-1-shouyeliu@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-05-09 09:50:34 +02:00
..
arm64 move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
chrome platform/chrome: cros_ec_lpc: Match on Framework ACPI device 2025-04-20 10:15:12 +02:00
cznic platform: cznic: CZNIC_PLATFORMS should depend on ARCH_MVEBU 2025-02-27 04:30:20 -08:00
goldfish platform/goldfish: goldfish_pipe: add missing MODULE_DESCRIPTION() macro 2024-07-03 16:40:46 +02:00
loongarch platform/loongarch: laptop: Fix possible UAF and simplify generic_acpi_laptop_init() 2022-10-29 16:29:31 +08:00
mellanox platform/mellanox: mlxbf-pmc: incorrect type in assignment 2025-02-08 09:57:26 +01:00
mips platform: mips: cpu_hwmon: Disable driver on unsupported hardware 2024-06-21 10:22:10 +02:00
olpc platform-drivers-x86 for v6.12-1 2024-09-19 09:16:04 +02:00
surface move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
x86 platform/x86/intel-uncore-freq: Fix missing uncore sysfs during CPU hotplug 2025-05-09 09:50:34 +02:00
Kconfig platform: cznic: Add preliminary support for Turris Omnia MCU 2024-07-01 15:46:36 +02:00
Makefile platform-drivers-x86 for v6.11-1 2024-07-17 17:05:21 -07:00