Paul Fertser
3e92d62d95
commit 5797c04400ee117bfe459ff1e468d0ea38054ab4 upstream. When an Icelake or Sapphire Rapids CPU isn't providing the maximum and critical thresholds for particular DIMM the driver should return an error to the userspace instead of giving it stale (best case) or wrong (the structure contains all zeros after kzalloc() call) data. The issue can be reproduced by binding the peci driver while the host is fully booted and idle, this makes PECI interaction unreliable enough. Fixes:73bc1b885d("hwmon: peci: Add dimmtemp driver") Fixes:621995b6d7("hwmon: (peci/dimmtemp) Add Sapphire Rapids support") Cc: stable@vger.kernel.org Signed-off-by: Paul Fertser <fercerpav@gmail.com> Reviewed-by: Iwona Winiarska <iwona.winiarska@intel.com> Link: https://lore.kernel.org/r/20250123122003.6010-1-fercerpav@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>