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drm/i915/gvt: Fix a memory leak in cmd_parser.c 

The pointer points to the original memory can never take the return value
of krealloc().

Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
This commit is contained in:
Zhi Wang 2017-09-10 21:36:21 +08:00 committed by Zhenyu Wang
parent 91d5d85442
commit bf4097ea57
1 changed files with 6 additions and 4 deletions
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10
drivers/gpu/drm/i915/gvt/cmd_parser.c
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@ -2620,14 +2620,16 @@ static int shadow_workload_ring_buffer(struct intel_vgpu_workload *workload)
gma_top = workload->rb_start + guest_rb_size;
if (workload->rb_len > vgpu->reserve_ring_buffer_size[ring_id]) {
void *va = vgpu->reserve_ring_buffer_va[ring_id];
void *va, *p;
/* realloc the new ring buffer if needed */
vgpu->reserve_ring_buffer_va[ring_id] =
krealloc(va, workload->rb_len, GFP_KERNEL);
if (!vgpu->reserve_ring_buffer_va[ring_id]) {
va = vgpu->reserve_ring_buffer_va[ring_id];
p = krealloc(va, workload->rb_len, GFP_KERNEL);
if (!p) {
gvt_vgpu_err("fail to alloc reserve ring buffer\n");
return -ENOMEM;
}
vgpu->reserve_ring_buffer_va[ring_id] = p;
vgpu->reserve_ring_buffer_size[ring_id] = workload->rb_len;
}