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@xxxxxxxxxxxxxxx> Fixes: 0edbfea537d1 ("tpm/tpm_tis_spi: Add support for spi phy") Signed-off-by: Alexander Steffen <Alexander.Steffen@xxxxxxxxxxxx> Signed-off-by: Peter Huewe <peter.huewe@xxxxxxxxxxxx> --- 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