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tpm: tpm_tis: add error logging for data transfer

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commit 0471921e2d upstream.

Add logging to more easily determine reason for transmit failure

Cc: stable@vger.kernel.org # v6.6+
Fixes: 280db21e15 ("tpm_tis: Resend command to recover from data transfer errors")
Signed-off-by: Jacqueline Wong <jacqwong@google.com>
Signed-off-by: Jordan Hand <jhand@google.com>
Link: https://lore.kernel.org/r/20260415160006.2275325-2-jacqwong@google.com
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jacqueline Wong
2026-05-07 06:11:49 +02:00
committed by Greg Kroah-Hartman
parent 53e6d2d834
commit 6503775a5c
1 changed files with 4 additions and 0 deletions
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drivers/char/tpm/tpm_tis_core.c
+4
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@@ -472,6 +472,8 @@ static int tpm_tis_send_data(struct tpm_chip *chip, const u8 *buf, size_t len)
status = tpm_tis_status(chip);
if (!itpm && (status & TPM_STS_DATA_EXPECT) == 0) {
rc = -EIO;
dev_err(&chip->dev, "TPM_STS_DATA_EXPECT should be set. sts = 0x%08x\n",
status);
goto out_err;
}
}
@@ -492,6 +494,8 @@ static int tpm_tis_send_data(struct tpm_chip *chip, const u8 *buf, size_t len)
status = tpm_tis_status(chip);
if (!itpm && (status & TPM_STS_DATA_EXPECT) != 0) {
rc = -EIO;
dev_err(&chip->dev, "TPM_STS_DATA_EXPECT should be unset. sts = 0x%08x\n",
status);
goto out_err;
}