diff options
| author | Xinyun Liu <xinyun.liu@intel.com> | 2018-06-07 22:48:40 +0800 |
|---|---|---|
| committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2018-06-11 15:03:36 +0800 |
| commit | 1f1c60d5b577377d07863f3e0891e63a0a56a3ad (patch) | |
| tree | 6344a315fc600fc93c1046cc7a5902674704f839 /drivers/gpu/drm/i915/gvt | |
| parent | 0766e2efc6968179ceec9828caf740ec0ac58a15 (diff) | |
drm/i915/gvt: Avoid dereference a potential null pointer
Add sanity check for up_irq_info.
Signed-off-by: Xinyun Liu <xinyun.liu@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/gvt')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/interrupt.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/gvt/interrupt.c b/drivers/gpu/drm/i915/gvt/interrupt.c index 7a041b368f68..1d79596da510 100644 --- a/drivers/gpu/drm/i915/gvt/interrupt.c +++ b/drivers/gpu/drm/i915/gvt/interrupt.c @@ -350,7 +350,8 @@ static void update_upstream_irq(struct intel_vgpu *vgpu, 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) { u32 isr = i915_mmio_reg_offset(up_irq_info->reg_base); |