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SubjectRe: [PATCH 2/2] CHROMIUM: tpm: tpm_i2c_infineon: Lock the I2C adapter for a sequence of requests.
Hi Peter / Bryan,

On Tue, Jun 12, 2012 at 02:43:54PM +0200, Peter Huewe wrote:
> From: Bryan Freed <>
> This is derived from Peter Huewe's recommended fix:
> On some ChromeOS systems, a TPM sharing the I2C bus with another device
> gets confused when it sees I2C requests to that other device.
> This change locks the I2C adapter for the duration of the full sequence
> of I2C requests the TPM needs to complete.
> smbus_xfer is not supported, but SMBUS is not supported by the original
> driver, either.
> Signed-off-by: Bryan Freed <>
> Signed-off-by: Peter Huewe <>

I've applied this patch to my tpmdd staging tree [1].


[1] git:// tpmdd-next

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