WMI monitoring methods can be changed or removed in new ASUS boards BIOS versions. Such versions return zero instead of a real one as Chip ID. Commit adds additional validation for the result of Chip ID call before enabling access by ASUS WMI methods. BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=204807 Signed-off-by: Denis Pauk <pauk.denis@xxxxxxxxx> --- drivers/hwmon/nct6775.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c index 57ce8633a725..034347ed51c4 100644 --- a/drivers/hwmon/nct6775.c +++ b/drivers/hwmon/nct6775.c @@ -5038,7 +5038,8 @@ static int __init sensors_nct6775_init(void) board_name); if (err >= 0) { /* if reading chip id via WMI succeeds, use WMI */ - if (!nct6775_asuswmi_read(0, NCT6775_PORT_CHIPID, &tmp)) { + if (!nct6775_asuswmi_read(0, NCT6775_PORT_CHIPID, &tmp) && + tmp) { pr_info("Using Asus WMI to access %#x chip.\n", tmp); access = access_asuswmi; } else { base-commit: 2585cf9dfaaddf00b069673f27bb3f8530e2039c -- 2.34.1
