FAILED: patch "[PATCH] pinctrl: renesas: rzg2l: Use -ENOTSUPP instead of -EOPNOTSUPP" failed to apply to 6.18-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 6.18-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 <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.18.y
git checkout FETCH_HEAD
git cherry-pick -x c1492da3939c89372929e062d731f328f7693f1e
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026072004-whisking-poncho-be11@gregkh' --subject-prefix 'PATCH 6.18.y' 'HEAD^..'

Possible dependencies:



thanks,

greg k-h

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

From c1492da3939c89372929e062d731f328f7693f1e Mon Sep 17 00:00:00 2001
From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Date: Fri, 15 May 2026 15:40:07 +0300
Subject: [PATCH] pinctrl: renesas: rzg2l: Use -ENOTSUPP instead of -EOPNOTSUPP

The pinctrl and GPIO core code make exceptions for the -ENOTSUPP error
code.  One such example is gpio_set_config_with_argument_optional(),
which returns success when gpio_set_config_with_argument() returns
-ENOTSUPP, but reports failure for all other error codes.

Returning -EOPNOTSUPP from the pinctrl driver on the unsupported pinctrl
operation may lead to boot failures when pinctrl drivers implements
struct gpio_chip::set_config, the system uses GPIO hogs, and the
struct gpio_chip::set_config implementation returns -EOPNOTSUPP for the
unsupported operations.

Return -ENOTSUPP for the unsupported pinctrl operation.

Fixes: 560c633d378a ("pinctrl: renesas: rzg2l: Drop oen_read and oen_write callbacks")
Fixes: c4c4637eb57f ("pinctrl: renesas: Add RZ/G2L pin and gpio controller driver")
Cc: stable@vger.kernel.org
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260515124008.2947838-2-claudiu.beznea@kernel.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index a106e087c224..05a33655e6cc 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -1281,7 +1281,7 @@ static int rzg2l_read_oen(struct rzg2l_pinctrl *pctrl, unsigned int _pin)
 	int bit;
 
 	if (!pctrl->data->pin_to_oen_bit)
-		return -EOPNOTSUPP;
+		return -ENOTSUPP;
 
 	bit = pctrl->data->pin_to_oen_bit(pctrl, _pin);
 	if (bit < 0)
@@ -1323,7 +1323,7 @@ static int rzg2l_write_oen(struct rzg2l_pinctrl *pctrl, unsigned int _pin, u8 oe
 	u8 val;
 
 	if (!pctrl->data->pin_to_oen_bit)
-		return -EOPNOTSUPP;
+		return -ENOTSUPP;
 
 	bit = pctrl->data->pin_to_oen_bit(pctrl, _pin);
 	if (bit < 0)
@@ -1754,7 +1754,7 @@ static int rzg2l_pinctrl_pinconf_set(struct pinctrl_dev *pctldev,
 			break;
 
 		default:
-			return -EOPNOTSUPP;
+			return -ENOTSUPP;
 		}
 	}
 
@@ -1837,7 +1837,7 @@ static int rzg2l_pinctrl_pinconf_group_get(struct pinctrl_dev *pctldev,
 
 		/* Check config matching between to pin  */
 		if (i && prev_config != *config)
-			return -EOPNOTSUPP;
+			return -ENOTSUPP;
 
 		prev_config = *config;
 	}