nyx: part mgr: only copy metadata in mbr if they exist
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@@ -425,6 +425,16 @@ static void _prepare_and_flash_mbr_gpt()
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mbr_t mbr;
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u8 random_number[16];
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// Read current MBR.
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sdmmc_storage_read(storage, 0, 1, &mbr);
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// Copy over metadata if they exist.
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if (*(u32 *)&part_info.mbr_old.bootstrap[0x80])
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memcpy(&mbr.bootstrap[0x80], &part_info.mbr_old.bootstrap[0x80], 64);
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if (*(u32 *)&part_info.mbr_old.bootstrap[0xE0])
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memcpy(&mbr.bootstrap[0xE0], &part_info.mbr_old.bootstrap[0xE0], 208);
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// Clear the first 16MB.
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memset((void *)SDMMC_UPPER_BUFFER, 0, AU_ALIGN_BYTES);
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s32 l4t_idx = -1;
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