Re: [tpmdd-devel] [PATCH 1/2] tpm: Apply an adapterlimit for retransmission.

From: Andrew Lunn
Date: Tue Feb 21 2017 - 11:30:08 EST

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.

Hi Enric

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?