From: Guanrui Huang guanrui.huang@linux.alibaba.com
stable inclusion from stable-v4.19.321 commit 139510ec274c7cc8739bb8f63aed70e425c2f0d8 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IATEDW
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ 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... Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yuntao Liu liuyuntao12@huawei.com --- drivers/irqchip/irq-gic-v3-its.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index f923747f1fdd..65306a1ed3dc 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -3477,8 +3477,6 @@ 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;