Messages in this thread Patch in this message | | | Date | Fri, 24 Feb 2017 14:55:24 +0200 | From | Jarkko Sakkinen <> | Subject | Re: [PATCH 2/5] tpm_tis_spi: Abort transfer when too many wait states are signaled |
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On Thu, Feb 16, 2017 at 04:08:23PM +0000, Peter Huewe wrote: > 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>
/Jarkko
> --- > drivers/char/tpm/tpm_tis_spi.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/char/tpm/tpm_tis_spi.c b/drivers/char/tpm/tpm_tis_spi.c > index 6e1a3c43f621..d782b9974c14 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, u8 len, > goto exit; > } > > + if (i == TPM_RETRY) { > + ret = -ETIMEDOUT; > + goto exit; > + } > + > spi_xfer.cs_change = 0; > spi_xfer.len = len; > > -- > 2.7.4 >
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