platform/x86: wmi: Skip blocks with zero instances

Some machines like the HP Omen 17 ck2000nf contain WMI blocks
with zero instances, so any WMI driver which tries to handle the
associated WMI device will fail.
Skip such WMI blocks to avoid confusing any WMI drivers.

Reported-by: Alexis Belmonte <alexbelm48@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218188
Fixes: bff431e49ff5 ("ACPI: WMI: Add ACPI-WMI mapping driver")
Tested-by: Alexis Belmonte <alexbelm48@gmail.com>
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20231129181654.5800-1-W_Armin@gmx.de
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 5c27b4aa969049ce5c6c4f97fc2ba08a41dde7b5..5dd22258cb3bc2b350331ce07431b8ecf6c45734 100644 (file)
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -1340,6 +1340,11 @@ static int parse_wdg(struct device *wmi_bus_dev, struct platform_device *pdev)
                if (debug_dump_wdg)
                        wmi_dump_wdg(&gblock[i]);
 
+               if (!gblock[i].instance_count) {
+                       dev_info(wmi_bus_dev, FW_INFO "%pUL has zero instances\n", &gblock[i].guid);
+                       continue;
+               }
+
                if (guid_already_parsed_for_legacy(device, &gblock[i].guid))
                        continue;