diff options
Diffstat (limited to 'drivers/char/tpm')
| -rw-r--r-- | drivers/char/tpm/tpm_tis_spi_main.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/char/tpm/tpm_tis_spi_main.c b/drivers/char/tpm/tpm_tis_spi_main.c index d96755935529..8d2c581a93c6 100644 --- a/drivers/char/tpm/tpm_tis_spi_main.c +++ b/drivers/char/tpm/tpm_tis_spi_main.c @@ -53,8 +53,6 @@ static int tpm_tis_spi_flow_control(struct tpm_tis_spi_phy *phy, if ((phy->iobuf[3] & 0x01) == 0) { // handle SPI wait states - phy->iobuf[0] = 0; - for (i = 0; i < TPM_RETRY; i++) { spi_xfer->len = 1; spi_message_init(&m); @@ -104,6 +102,8 @@ int tpm_tis_spi_transfer(struct tpm_tis_data *data, u32 addr, u16 len, if (ret < 0) goto exit; + /* Flow control transfers are receive only */ + spi_xfer.tx_buf = NULL; ret = phy->flow_control(phy, &spi_xfer); if (ret < 0) goto exit; @@ -113,9 +113,8 @@ int tpm_tis_spi_transfer(struct tpm_tis_data *data, u32 addr, u16 len, spi_xfer.delay.value = 5; spi_xfer.delay.unit = SPI_DELAY_UNIT_USECS; - if (in) { - spi_xfer.tx_buf = NULL; - } else if (out) { + if (out) { + spi_xfer.tx_buf = phy->iobuf; spi_xfer.rx_buf = NULL; memcpy(phy->iobuf, out, transfer_len); out += transfer_len; |