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tpm: tis_i2c: Limit write bursts to I2C_SMBUS_BLOCK_MAX (32) bytes
authorAlexander Sverdlin <alexander.sverdlin@siemens.com>
Wed, 24 May 2023 15:40:40 +0000 (17:40 +0200)
committerJarkko Sakkinen <jarkko@kernel.org>
Mon, 17 Jul 2023 19:32:30 +0000 (19:32 +0000)
commit83e7e5d89f04d1c417492940f7922bc8416a8cc4
treed0a987759a9ef6a9f9f1e34a8ddb13f6d1597ac2
parentf3b70b6e3390bfdf18fdd7d278a72a12784fdcce
tpm: tis_i2c: Limit write bursts to I2C_SMBUS_BLOCK_MAX (32) bytes

Underlying I2C bus drivers not always support longer transfers and
imx-lpi2c for instance doesn't. The fix is symmetric to previous patch
which fixed the read direction.

Cc: stable@vger.kernel.org # v5.20+
Fixes: bbc23a07b072 ("tpm: Add tpm_tis_i2c backend for tpm_tis_core")
Tested-by: Michael Haener <michael.haener@siemens.com>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
drivers/char/tpm/tpm_tis_i2c.c