drm/i915/gvt: fix mem leakage in setup_vgpu_mmio for vgpu reset
Gvt gdrst handler handle_device_reset() invoke function
setup_vgpu_mmio() to reset mmio status. In this case,
the virtual mmio memory has been allocated already. The
new allocation just cause old mmio memory leakage.
Signed-off-by: Du, Changbin <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
index 3a15fea..044125c 100644
--- a/drivers/gpu/drm/i915/gvt/vgpu.c
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -46,9 +46,13 @@ int setup_vgpu_mmio(struct intel_vgpu *vgpu)
struct intel_gvt *gvt = vgpu->gvt;
const struct intel_gvt_device_info *info = &gvt->device_info;
- vgpu->mmio.vreg = vzalloc(info->mmio_size * 2);
- if (!vgpu->mmio.vreg)
- return -ENOMEM;
+ if (vgpu->mmio.vreg)
+ memset(vgpu->mmio.vreg, 0, info->mmio_size * 2);
+ else {
+ vgpu->mmio.vreg = vzalloc(info->mmio_size * 2);
+ if (!vgpu->mmio.vreg)
+ return -ENOMEM;
+ }
vgpu->mmio.sreg = vgpu->mmio.vreg + info->mmio_size;