hwc: Fix handling of disconnected displays in check_sync_fds()

For disconnected displays HWComposer may send NULL pointer as
list of layers.

Change-Id: Ifd71f7592c64a2d36fad2f4845cf8cb1ad2cce08
Signed-off-by: Mykola Ostrovskyy <mykola@ti.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/hwc/hwc.c b/hwc/hwc.c
index e155d28..808a2af 100644
--- a/hwc/hwc.c
+++ b/hwc/hwc.c
@@ -1388,6 +1388,9 @@ static void check_sync_fds(size_t numDisplays, hwc_display_contents_1_t** displa
     unsigned int i, j;
     for (i = 0; i < numDisplays; i++) {
         hwc_display_contents_1_t* list = displays[i];
+        if (!list)
+            continue;
+
         if (list->retireFenceFd >= 0) {
             ALOGW("retireFenceFd[%u] was %d", i, list->retireFenceFd);
             list->retireFenceFd = -1;