[PATCH 09/10] irqchip/gic-v5: Clean the allocated linear device table size

[Sascha Bischoff]

When the linear device table exceeds the kmalloc limit, the driver
caps the DeviceID width before allocation but keeps the original size
for cache maintenance. On a noncoherent ITS, this cleans beyond the
allocated table.

Recalculate the size after capping the DeviceID width.

Fixes: 57d72196dfc85 ("irqchip/gic-v5: Add GICv5 ITS support")
Signed-off-by: Sascha Bischoff <sascha.bischoff@xxxxxxx>
---
 drivers/irqchip/irq-gic-v5-its.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/irqchip/irq-gic-v5-its.c b/drivers/irqchip/irq-gic-v5-its.c
index 4de07bbdc4923..c0f3982229194 100644
--- a/drivers/irqchip/irq-gic-v5-its.c
+++ b/drivers/irqchip/irq-gic-v5-its.c
@@ -601,6 +601,7 @@ static int gicv5_its_alloc_devtab_linear(struct gicv5_its_chip_data *its,
 		pr_warn("Limiting device ID bits from %u to %u\n",
 			device_id_bits, device_id_cap);
 		device_id_bits = device_id_cap;
+		sz = BIT_ULL(device_id_bits) * sizeof(*devtab);
 	}
 
 	devtab = kcalloc(BIT(device_id_bits), sizeof(*devtab), GFP_KERNEL);

-- 
2.34.1