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| author | Peter Huewe <peter.huewe@infineon.com> | 2017-03-02 16:03:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-25 16:44:31 +0300 |
| commit | daa432c1a65a541b413111328f8aea61161ad372 (patch) | |
| tree | 1a824222c04e9a52a67ef9a96a23f22ac1c2e8ca /drivers/char | |
| parent | aad1e5c81cbb0617ef544f65d2e4b41fed05484f (diff) | |
| download | linux-daa432c1a65a541b413111328f8aea61161ad372.tar.xz | |
tpm_tis_spi: Abort transfer when too many wait states are signaled
commit 975094ddc369a32f27210248bdd9bbd153061b00 upstream.
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.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char')
| -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 8341d5f2792c..b515ce755f12 100644 --- a/drivers/char/tpm/tpm_tis_spi.c +++ b/drivers/char/tpm/tpm_tis_spi.c @@ -102,6 +102,11 @@ 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; |