linux-kernel - [PATCH] irqchip/gic-v5: Fix gicv5_its_map

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Message-ID: <20251222102250.435460-1-lpieralisi@kernel.org>
Date: Mon, 22 Dec 2025 11:22:50 +0100
From: Lorenzo Pieralisi <lpieralisi@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org,
	kernel test robot <lkp@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Marc Zyngier <maz@...nel.org>
Subject: [PATCH] irqchip/gic-v5: Fix gicv5_its_map_event() ITTE read endianness

Kbuild bot (through sparse) reported that the ITTE read to carry out
a valid check in gicv5_its_map_event() lacks proper endianness handling.

Fix it.

Fixes: 57d72196dfc8 ("irqchip/gic-v5: Add GICv5 ITS support")
Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202512131849.30ZRTBeR-lkp@intel.com/
Signed-off-by: Lorenzo Pieralisi <lpieralisi@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Marc Zyngier <maz@...nel.org>
---
 drivers/irqchip/irq-gic-v5-its.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic-v5-its.c b/drivers/irqchip/irq-gic-v5-its.c
index 554485f0be1f..8e22134b9f48 100644
--- a/drivers/irqchip/irq-gic-v5-its.c
+++ b/drivers/irqchip/irq-gic-v5-its.c
@@ -849,7 +849,7 @@ static int gicv5_its_map_event(struct gicv5_its_dev *its_dev, u16 event_id, u32
 
 	itte = gicv5_its_device_get_itte_ref(its_dev, event_id);
 
-	if (FIELD_GET(GICV5_ITTL2E_VALID, *itte))
+	if (FIELD_GET(GICV5_ITTL2E_VALID, le64_to_cpu(*itte)))
 		return -EEXIST;
 
 	itt_entry = FIELD_PREP(GICV5_ITTL2E_LPI_ID, lpi) |
-- 
2.50.1