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don't reflash agnos update if already flashed #19944

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Jan 28, 2021
Merged

don't reflash agnos update if already flashed #19944

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9 changes: 8 additions & 1 deletion selfdrive/hardware/tici/agnos.py
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Original file line number Diff line number Diff line change
Expand Up @@ -80,8 +80,15 @@ def flash_partition(cloudlog, spinner, target_slot, partition):
cloudlog.info(f"Downloading and writing {partition['name']}")

downloader = StreamingDecompressor(partition['url'])
with open(f"/dev/disk/by-partlabel/{partition['name']}{target_slot}", 'wb') as out:
with open(f"/dev/disk/by-partlabel/{partition['name']}{target_slot}", 'wb+') as out:
partition_size = partition['size']

# Check if partition is already flashed
out.seek(partition_size)
if out.read(64) == partition['hash_raw'].lower().encode():
cloudlog.info(f"Already flashed {partition['name']}")
return

# Clear hash before flashing
out.seek(partition_size)
out.write(b"\x00" * 64)
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