Bounce to Wolfram Sang 2017-02-22 15:01 GMT+01:00 Andrew Lunn <[email protected]>: > On Wed, Feb 22, 2017 at 12:16:08PM +0100, Enric Balletbo i Serra wrote: >> Hi Andrew, >> >> Removing Bryan Freed from the loop as seems his email is not valid anymore. >> I already CC'ied Andrey which is doing the TPM bit in chromeos kernel. >> >> On 21/02/17 17:29, Andrew Lunn wrote: >> > On Tue, Feb 21, 2017 at 03:44:59PM +0100, Enric Balletbo i Serra wrote: >> >> From: Bryan Freed <[email protected]> >> >> >> >> 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? >> > >> >> Sounds a good idea to me, I guess the quirk info can be accessed with >> >> tpm_dev.client->adapter->quirks->max_read_len >> >> so I think we don't need to touch the i2c core. I'll propose a second >> version of the patch. > > Hi Enric > > You should probably ask Wolfram Sang <[email protected]>, the i2c > subsystem maintainer. He may prefer adding an API call. > > Andrew
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