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sync: store the num_fences from first SYNC_IOC_FILE_INFO

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Fixes a bug with the signal time of devices using the
modern sync file interface. The bug only affects kernels running
an Android kernel 4.9 and later.

b/63395253

Test: tests/sync_test.cpp

Change-Id: I6fb00bcb8e16a3268c357153edd8e35a44546caa
This commit is contained in:
Saurabh Shah 2017-08-01 13:54:21 -07:00 committed by Marissa Wall
parent 22a10f6766
commit 90a74600d7
1 changed files with 2 additions and 0 deletions
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2
libsync/sync.c
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@ -217,6 +217,8 @@ static struct sync_file_info *modern_sync_file_info(int fd)
local_info.num_fences * sizeof(struct sync_fence_info));
if (!info)
return NULL;
info->num_fences = local_info.num_fences;
info->sync_fence_info = (__u64)(uintptr_t)(info + 1);
err = ioctl(fd, SYNC_IOC_FILE_INFO, info);