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In some cases, when the driver attempts to read an MMIO register, the hardware may return 0xFFFFFFFF. The current force wake path code treats this as a valid response, as it only checks the BIT. However, 0xFFFFFFFF should be considered an invalid value, indicating a potential issue. To address this, we should add a log entry to highlight this condition and return failure. The force wake failure log level is changed from notice to err to match the failure return value. v2 (Matt Brost): - set ret value (-EIO) to kick the error to upper layers v3 (Rodrigo): - add commit message for the log level promotion from notice to err v4: - update reviewed info Suggested-by: Alex Zuo <alex.zuo@intel.com> Signed-off-by: Shuicheng Lin <shuicheng.lin@intel.com> Cc: Matthew Brost <matthew.brost@intel.com> Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com> Acked-by: Badal Nilawar <badal.nilawar@intel.com> Cc: Anshuman Gupta <anshuman.gupta@intel.com> Cc: Matt Roper <matthew.d.roper@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20241017221547.1564029-1-shuicheng.lin@intel.com Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>