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Commit 1f1c60d5 authored by Xinyun Liu's avatar Xinyun Liu Committed by Zhenyu Wang
Browse files

drm/i915/gvt: Avoid dereference a potential null pointer 



Add sanity check for up_irq_info.

Signed-off-by: default avatarXinyun Liu <xinyun.liu@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent 0766e2ef

drivers/gpu/drm/i915/gvt/interrupt.c

+2 −1
Original line number Original line Diff line number Diff line
@@ -350,7 +350,8 @@ static void update_upstream_irq(struct intel_vgpu *vgpu, 
			clear_bits |= (1 << bit);

			clear_bits |= (1 << bit);

	}

	}





	WARN_ON(!up_irq_info);

	if (WARN_ON(!up_irq_info))

		return;





	if (up_irq_info->group == INTEL_GVT_IRQ_INFO_MASTER) {

	if (up_irq_info->group == INTEL_GVT_IRQ_INFO_MASTER) {

		u32 isr = i915_mmio_reg_offset(up_irq_info->reg_base);

		u32 isr = i915_mmio_reg_offset(up_irq_info->reg_base);