commit 8aeca7c04513e890c38ff6c44d1ae9cf480fb007
Author: Stefan Gottwald <gottwald@igel.com>
Date:   Tue Jul 5 09:00:03 2022 +0200

    LX7-6765 : Fix kernel NULL pointer derefernce on HP t550 (intel elkhart) device

diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c
index 826d494f3cc6..891b2c5624ac 100644
--- a/drivers/pinctrl/intel/pinctrl-intel.c
+++ b/drivers/pinctrl/intel/pinctrl-intel.c
@@ -1632,12 +1632,17 @@ const struct intel_pinctrl_soc_data *intel_pinctrl_get_soc_data(struct platform_
 	unsigned int i;
 
 	adev = ACPI_COMPANION(&pdev->dev);
-	if (adev) {
+	if (adev && !adev->pnp.unique_id) {
+		printk(KERN_ERR "intel_pinctrl_get_soc_data: adev->pnp.unique_id is NULL\n");
+	}
+	if (adev && adev->pnp.unique_id) {
 		const void *match = device_get_match_data(&pdev->dev);
 
 		table = (const struct intel_pinctrl_soc_data **)match;
 		for (i = 0; table[i]; i++) {
-			if (!strcmp(adev->pnp.unique_id, table[i]->uid)) {
+			if (!table[i]->uid) {
+				printk(KERN_ERR "intel_pinctrl_get_soc_data: table[%d]->uid is NULL\n", i);
+			} else if (!strcmp(adev->pnp.unique_id, table[i]->uid)) {
 				data = table[i];
 				break;
 			}