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| author | Peter Huewe <peter.huewe@infineon.com> | 2017-03-02 14:03:12 +0100 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2017-04-03 21:46:01 +0200 |
| commit | 975094ddc369a32f27210248bdd9bbd153061b00 (patch) | |
| tree | a6368da8b555ef4c3ce5b5cd55637c8ad9ff0ede /drivers/char/tpm | |
| parent | tpm_tis_spi: Use single function to transfer data (diff) | |
| download | linux-975094ddc369a32f27210248bdd9bbd153061b00.tar.xz linux-975094ddc369a32f27210248bdd9bbd153061b00.zip | |
tpm_tis_spi: Abort transfer when too many wait states are signaled
Abort the transfer with ETIMEDOUT when the TPM signals more than
TPM_RETRY wait states. Continuing with the transfer in this state
will only lead to arbitrary failures in other parts of the code.
Cc: <stable@vger.kernel.org>
Fixes: 0edbfea537d1 ("tpm/tpm_tis_spi: Add support for spi phy")
Signed-off-by: Alexander Steffen <Alexander.Steffen@infineon.com>
Signed-off-by: Peter Huewe <peter.huewe@infineon.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Benoit Houyere <benoit.houyere@st.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'drivers/char/tpm')
| -rw-r--r-- | drivers/char/tpm/tpm_tis_spi.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm_tis_spi.c b/drivers/char/tpm/tpm_tis_spi.c index 062799e04f04..639614f2d415 100644 --- a/drivers/char/tpm/tpm_tis_spi.c +++ b/drivers/char/tpm/tpm_tis_spi.c @@ -101,6 +101,11 @@ static int tpm_tis_spi_transfer(struct tpm_tis_data *data, u32 addr, u16 len, goto exit; } + if (i == TPM_RETRY) { + ret = -ETIMEDOUT; + goto exit; + } + spi_xfer.cs_change = 0; spi_xfer.len = len; |