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SubjectRe: [PATCH] tpm: add support for partial reads
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On 07/23/2018 02:13 PM, James Bottomley wrote:
> The current patch does, you even provided a use case in your last email
> (it's do command to get sizing followed by do command with correctly
> sized buffer).

The example I provided was: #1 send a command, #2 read the response header
(10 bytes), get the actual response size from the header and then #3 read
the full response (response size - size of the header bytes).

>
> However, if you tie it to O_NONBLOCK, it won't because no-one currently
> opens the TPM device non blocking so it's an ABI conformant
> discriminator of the uses. Tying to O_NONBLOCK should be simple
> because it's in file->f_flags.

I think that it might be an option. Especially that I have this on top of
the async patch. Let's discuss this when Jarkko is back.

Thanks,
--
Tadeusz

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