FAILED: patch "[PATCH] irqchip/renesas-rzv2h: Prevent TINT spurious interrupt" failed to apply to 6.14-stable tree

FAILED: patch "[PATCH] irqchip/renesas-rzv2h: Prevent TINT spurious interrupt" failed to apply to 6.14-stable tree

[gregkh]

The patch below does not apply to the 6.14-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-6.14.y
git checkout FETCH_HEAD
git cherry-pick -x 28e89cdac6482f3c980df3e2e245db7366269124
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2025042143-clash-grumbly-11dd@gregkh' --subject-prefix 'PATCH 6.14.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

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

From 28e89cdac6482f3c980df3e2e245db7366269124 Mon Sep 17 00:00:00 2001
From: Biju Das <biju.das.jz@bp.renesas.com>
Date: Tue, 15 Apr 2025 11:33:41 +0100
Subject: [PATCH] irqchip/renesas-rzv2h: Prevent TINT spurious interrupt

A spurious TINT interrupt is seen during boot on RZ/G3E SMARC EVK.

A glitch in the edge detection circuit can cause a spurious interrupt.

Clear the status flag after setting the ICU_TSSRk registers, which is
recommended in the hardware manual as a countermeasure.

Fixes: 0d7605e75ac2 ("irqchip: Add RZ/V2H(P) Interrupt Control Unit (ICU) driver")
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org

diff --git a/drivers/irqchip/irq-renesas-rzv2h.c b/drivers/irqchip/irq-renesas-rzv2h.c
index 3d5b5fdf9bde..0f0fd7d4dfdf 100644
--- a/drivers/irqchip/irq-renesas-rzv2h.c
+++ b/drivers/irqchip/irq-renesas-rzv2h.c
@@ -170,6 +170,14 @@ static void rzv2h_tint_irq_endisable(struct irq_data *d, bool enable)
 	else
 		tssr &= ~ICU_TSSR_TIEN(tssel_n, priv->info->field_width);
 	writel_relaxed(tssr, priv->base + priv->info->t_offs + ICU_TSSR(k));
+
+	/*
+	 * A glitch in the edge detection circuit can cause a spurious
+	 * interrupt. Clear the status flag after setting the ICU_TSSRk
+	 * registers, which is recommended by the hardware manual as a
+	 * countermeasure.
+	 */
+	writel_relaxed(BIT(tint_nr), priv->base + priv->info->t_offs + ICU_TSCLR);
 }
 
 static void rzv2h_icu_irq_disable(struct irq_data *d)