irqchip/gic-v3-its: Remove BUG_ON in its_vpe_irq_domain_alloc

[ Upstream commit 382d2ffe86efb1e2fa803d2cf17e5bfc34e574f3 ]

This BUG_ON() is useless, because the same effect will be obtained
by letting the code run its course and vm being dereferenced,
triggering an exception.

So just remove this check.

Signed-off-by: Guanrui Huang <guanrui.huang@linux.alibaba.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240418061053.96803-3-guanrui.huang@linux.alibaba.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 4e486cccc4cc62042fb933f364d76ce1202c4859..a9469751720cc99001182d92c131edbe9a32eae8 100644 (file)
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -4469,8 +4469,6 @@ static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq
        struct page *vprop_page;
        int base, nr_ids, i, err = 0;
 
-       BUG_ON(!vm);
-
        bitmap = its_lpi_alloc(roundup_pow_of_two(nr_irqs), &base, &nr_ids);
        if (!bitmap)
                return -ENOMEM;