ACPI: CPPC: Check cpc_read() return values consistently

Browse source

Callers of cpc_read() ignore its return value, which can lead
to using uninitialized or stale values when the read fails.

Fix this by consistently checking cpc_read() return values in
cppc_get_perf_caps(), cppc_get_perf_ctrs(), and cppc_get_perf().

Link: https://lore.kernel.org/lkml/48bdf87e-39f1-402f-a7dc-1a0e1e7a819d@nvidia.com/
Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Link: https://patch.msgid.link/20260318095005.2437960-1-sumitg@nvidia.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

...

This commit is contained in:

Sumit Gupta 2026-03-18 15:20:05 +05:30 • committed by Rafael J. Wysocki

parent be473f0591

commit 0cc2497722

1 changed files with 72 additions and 27 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

99

drivers/acpi/cppc_acpi.c

View file