[SRU][Q/R][PATCH 1/1] platform/x86: alienware-wmi-wmax: Fix NULL pointer dereference in sleep handlers

[AceLan Kao]

From: Kurt Borja <kuurtb at gmail.com>

BugLink: https://bugs.launchpad.net/bugs/2132095

Devices without the AWCC interface don't initialize `awcc`. Add a check
before dereferencing it in sleep handlers.

Cc: stable at vger.kernel.org
Reported-by: Gal Hammer <galhammer at gmail.com>
Tested-by: Gal Hammer <galhammer at gmail.com>
Fixes: 07ac275981b1 ("platform/x86: alienware-wmi-wmax: Add support for manual fan control")
Signed-off-by: Kurt Borja <kuurtb at gmail.com>
Link: https://patch.msgid.link/20251014-sleep-fix-v3-1-b5cb58da4638@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen at linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen at linux.intel.com>
(cherry picked from commit a49c4d48c3b60926e6a8cec217bf95aa65388ecc)
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao at canonical.com>
---
 drivers/platform/x86/dell/alienware-wmi-wmax.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/dell/alienware-wmi-wmax.c b/drivers/platform/x86/dell/alienware-wmi-wmax.c
index 31f9643a6a3b..b106e8e407b3 100644
--- a/drivers/platform/x86/dell/alienware-wmi-wmax.c
+++ b/drivers/platform/x86/dell/alienware-wmi-wmax.c
@@ -1639,7 +1639,7 @@ static int wmax_wmi_probe(struct wmi_device *wdev, const void *context)
 
 static int wmax_wmi_suspend(struct device *dev)
 {
-	if (awcc->hwmon)
+	if (awcc && awcc->hwmon)
 		awcc_hwmon_suspend(dev);
 
 	return 0;
@@ -1647,7 +1647,7 @@ static int wmax_wmi_suspend(struct device *dev)
 
 static int wmax_wmi_resume(struct device *dev)
 {
-	if (awcc->hwmon)
+	if (awcc && awcc->hwmon)
 		awcc_hwmon_resume(dev);
 
 	return 0;
-- 
2.43.0