FAILED: patch "[PATCH] pinctrl: renesas: rzg2l: Return -EINVAL for pins which have" failed to apply to 5.15-stable tree

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 5223c511eb4f919e6b423b2f66e02674e97e77e3 Mon Sep 17 00:00:00 2001
From: Lad Prabhakar <[email protected]>
Date: Wed, 11 May 2022 10:40:57 +0100
Subject: [PATCH] pinctrl: renesas: rzg2l: Return -EINVAL for pins which have
input disabled

Pin status reported by pinconf-pins file always reported pin status as "input enabled" even for pins which had input disabled. Fix this by returning -EINVAL for the pins which have input disabled.

index a48cac55152c..c3cdf52b7294 100644
@@ -517,6 +517,8 @@ static int rzg2l_pinctrl_pinconf_get(struct pinctrl_dev *pctldev,
 		if (!(cfg & PIN_CFG_IEN))
 			return -EINVAL;
 		arg = rzg2l_read_pin_config(pctrl, IEN(port_offset), bit, IEN_MASK);
+		if (!arg)
+			return -EINVAL;
 		break;
 
 	case PIN_CONFIG_POWER_SOURCE: {