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tpm_tis: Resend command to recover from data transfer errors
[ Upstream commit 280db21e15
]
Similar to the transmission of TPM responses, also the transmission of TPM
commands may become corrupted. Instead of aborting when detecting such
issues, try resending the command again.
Signed-off-by: Alexander Steffen <Alexander.Steffen@infineon.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 10 additions and 3 deletions
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@ -498,10 +498,17 @@ static int tpm_tis_send_main(struct tpm_chip *chip, const u8 *buf, size_t len)
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int rc;
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u32 ordinal;
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unsigned long dur;
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unsigned int try;
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rc = tpm_tis_send_data(chip, buf, len);
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if (rc < 0)
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return rc;
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for (try = 0; try < TPM_RETRY; try++) {
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rc = tpm_tis_send_data(chip, buf, len);
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if (rc >= 0)
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/* Data transfer done successfully */
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break;
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else if (rc != -EIO)
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/* Data transfer failed, not recoverable */
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return rc;
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}
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rc = tpm_tis_verify_crc(priv, len, buf);
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if (rc < 0) {
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