This is a note to let you know that I've just added the patch titled
platform/x86: wmi: Skip blocks with zero instances
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
platform-x86-wmi-skip-blocks-with-zero-instances.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 43745ce44e7f7d21edb04bdea32fc751cf3f7927
Author: Armin Wolf <W_Armin@xxxxxx>
Date: Wed Nov 29 19:16:54 2023 +0100
platform/x86: wmi: Skip blocks with zero instances
[ Upstream commit cbf54f37600e874d82886aa3b2f471778cae01ce ]
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@xxxxxxxxx>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218188
Fixes: bff431e49ff5 ("ACPI: WMI: Add ACPI-WMI mapping driver")
Tested-by: Alexis Belmonte <alexbelm48@xxxxxxxxx>
Signed-off-by: Armin Wolf <W_Armin@xxxxxx>
Link: https://lore.kernel.org/r/20231129181654.5800-1-W_Armin@xxxxxx
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 317c907304149..d75a0ae9cd0c5 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -1285,6 +1285,11 @@ static int parse_wdg(struct device *wmi_bus_dev, struct acpi_device *device)
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;
