linux-kernel - RE: [PATCH] CHROMIUM: tpm: tpm_tis_i2c: Lock the I2C adapter for a sequence of requests.

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Date:	Fri, 5 Aug 2011 12:05:22 +0000
From:	<Huewe.external@...ineon.com>
To:	<bfreed@...omium.org>, <linux-kernel@...r.kernel.org>
CC:	<tpmdd-devel@...ts.sourceforge.net>, <m.selhorst@...rix.com>,
	<srajiv@...ux.vnet.ibm.com>, <debora@...ux.vnet.ibm.com>,
	<Huewe.external@...ineon.com>
Subject: RE: [PATCH] CHROMIUM: tpm: tpm_tis_i2c: Lock the I2C adapter for a
 sequence of requests.

> Subject: [PATCH] CHROMIUM: tpm: tpm_tis_i2c: Lock the I2C adapter for a
> sequence of requests.
> 
> 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 <bfreed@...omium.org>

Looks good to me :)

Signed-off-by: Peter Huewe <huewe.external@...ineon.com>

Thanks,
Peter
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