hwc2: Dup buffer fd in SetLayerBuffer() to avoid fb_id failure

Buffer fd for layers/client target is getting closed in ComposerClient
without hwcomposer knowledge, So creation of fb_id for that buffer
failed during DP disconnect. Hence duplicate the buffer fd to avoid
create fb id failures.

Change-Id: I7fb04aff9605ac28a64dcd615fa4804caa923996
CRs-Fixed: 2157977

1 files changed, 12 insertions, 5 deletions

diff --git a/sdm/libs/hwc2/hwc_layers.cpp b/sdm/libs/hwc2/hwc_layers.cpp
index 0bcffc62..bd6aefa0 100644
--- a/sdm/libs/hwc2/hwc_layers.cpp
+++ b/sdm/libs/hwc2/hwc_layers.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2017, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
  * Not a Contribution.
  *
  * Copyright 2015 The Android Open Source Project
@@ -180,12 +180,15 @@ HWCLayer::HWCLayer(hwc2_display_t display_id, HWCBufferAllocator *buf_allocator)
 HWCLayer::~HWCLayer() {
   // Close any fences left for this layer
   while (!release_fences_.empty()) {
-    close(release_fences_.front());
+    ::close(release_fences_.front());
     release_fences_.pop();
   }
   if (layer_) {
     if (layer_->input_buffer.acquire_fence_fd >= 0) {
-      close(layer_->input_buffer.acquire_fence_fd);
+      ::close(layer_->input_buffer.acquire_fence_fd);
+    }
+    if (buffer_fd_ >= 0) {
+      ::close(buffer_fd_);
     }
     delete layer_;
   }
@@ -257,10 +260,14 @@ HWC2::Error HWCLayer::SetLayerBuffer(buffer_handle_t buffer, int32_t acquire_fen
   layer_buffer->flags.secure_display = secure_display;
 
   if (layer_buffer->acquire_fence_fd >= 0) {
-    close(layer_buffer->acquire_fence_fd);
+    ::close(layer_buffer->acquire_fence_fd);
   }
   layer_buffer->acquire_fence_fd = acquire_fence;
-  layer_buffer->planes[0].fd = handle->fd;
+  if (buffer_fd_ >= 0) {
+    ::close(buffer_fd_);
+  }
+  buffer_fd_ = ::dup(handle->fd);
+  layer_buffer->planes[0].fd = buffer_fd_;
   layer_buffer->planes[0].offset = handle->offset;
   layer_buffer->planes[0].stride = UINT32(handle->width);
   layer_buffer->size = handle->size;