KVM: arm64: vgic: Drop WARN from vgic_get_irq

mainline inclusion
from mainline-v5.15-rc1
commit b9a51949
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I56LDF

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=B9a51949cebcd57bfb9385d9da62ace52564898c



--------------------------------

vgic_get_irq(intid) is used all over the vgic code in order to get a
reference to a struct irq. It warns whenever intid is not a valid number
(like when it's a reserved IRQ number). The issue is that this warning
can be triggered from userspace (e.g., KVM_IRQ_LINE for intid 1020).

Drop the WARN call from vgic_get_irq.

Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Oliver Upton <oupton@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210818213205.598471-1-ricarkol@google.com


Signed-off-by: Lin Yujun <linyujun809@huawei.com>
Reviewed-by: Zhang Jianhua <chris.zjh@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>