Re: [tpmdd-devel] [PATCH 1/2] tpm: Apply an adapterlimit for retransmission.
From: Peter Huewe
Date: Wed Feb 22 2017 - 07:40:12 EST
Am 21. Februar 2017 17:29:48 MEZ schrieb Andrew Lunn <andrew@xxxxxxx>:
>On Tue, Feb 21, 2017 at 03:44:59PM +0100, Enric Balletbo i Serra wrote:
>> From: Bryan Freed <bfreed@xxxxxxxxxxxx>
>> When the I2C Infineon part is attached to an I2C adapter that imposes
>> a size limitation, large requests will fail -EINVAL.
>> Retry them with size backoff without re-issuing the 0x05 command
>> as this appears to occasionally put the TPM in a bad state.
>Rather than trying small and smaller transfers, would it not be better
>to get the i2c core to expose the quirk info about transfer limits?
I think that would be the better idea.
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