[U-Boot] [PATCH] tools/fw_env: use fsync to ensure that data is physically stored

[Wolfgang Denk]

Dear Michael Heimpold,

In message <1369078482-5863-1-git-send-email-mhei at heimpold.de> you wrote:
> Closing a file descriptor does not guarantee that the data has been
> successfully saved to disk, as the kernel might defer the write.

What is the exact problem you are trying to fix?

I mean, when exactly does adding the sync play a role?

Best regards,

Wolfgang Denk

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