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Commit f3b70b6e authored by Alexander Sverdlin's avatar Alexander Sverdlin Committed by Jarkko Sakkinen
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tpm: tis_i2c: Limit read bursts to I2C_SMBUS_BLOCK_MAX (32) bytes

Underlying I2C bus drivers not always support longer transfers and
imx-lpi2c for instance doesn't. SLB 9673 offers 427-bytes packets.

Visible symptoms are:

tpm tpm0: Error left over data
tpm tpm0: tpm_transmit: tpm_recv: error -5
tpm_tis_i2c: probe of 1-002e failed with error -5

Cc: stable@vger.kernel.org # v5.20+
Fixes: bbc23a07

 ("tpm: Add tpm_tis_i2c backend for tpm_tis_core")
Tested-by: default avatarMichael Haener <michael.haener@siemens.com>
Signed-off-by: default avatarAlexander Sverdlin <alexander.sverdlin@siemens.com>
Reviewed-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: default avatarJerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
parent f0afba40
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