tpm/st33zp24/spi: Remove field spi_xfer from st33zp24_spi_phy structure

Remove spi_xfer from st33zp24_spi_phy structure and declare local spi_xfer
when needed instead.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

1 files changed, 25 insertions, 24 deletions

diff --git a/drivers/char/tpm/st33zp24/spi.c b/drivers/char/tpm/st33zp24/spi.c
index 08ffbfe7588c..f85105303de9 100644
--- a/drivers/char/tpm/st33zp24/spi.c
+++ b/drivers/char/tpm/st33zp24/spi.c
@@ -66,7 +66,7 @@
 
 struct st33zp24_spi_phy {
         struct spi_device *spi_device;
-        struct spi_transfer spi_xfer;
+
         u8 tx_buf[ST33ZP24_SPI_BUFFER_SIZE];
         u8 rx_buf[ST33ZP24_SPI_BUFFER_SIZE];
 
@@ -113,28 +113,30 @@ static int st33zp24_spi_send(void *phy_id, u8 tpm_register, u8 *tpm_data,
         int total_length = 0, ret = 0;
         struct st33zp24_spi_phy *phy = phy_id;
         struct spi_device *dev = phy->spi_device;
-        u8 *tx_buf = (u8 *)phy->spi_xfer.tx_buf;
-        u8 *rx_buf = phy->spi_xfer.rx_buf;
+        struct spi_transfer spi_xfer = {
+                .tx_buf = phy->tx_buf,
+                .rx_buf = phy->rx_buf,
+        };
 
         /* Pre-Header */
-        tx_buf[total_length++] = TPM_WRITE_DIRECTION | LOCALITY0;
-        tx_buf[total_length++] = tpm_register;
+        phy->tx_buf[total_length++] = TPM_WRITE_DIRECTION | LOCALITY0;
+        phy->tx_buf[total_length++] = tpm_register;
 
         if (tpm_size > 0 && tpm_register == TPM_DATA_FIFO) {
-                tx_buf[total_length++] = tpm_size >> 8;
-                tx_buf[total_length++] = tpm_size;
+                phy->tx_buf[total_length++] = tpm_size >> 8;
+                phy->tx_buf[total_length++] = tpm_size;
         }
 
-        memcpy(&tx_buf[total_length], tpm_data, tpm_size);
+        memcpy(&phy->tx_buf[total_length], tpm_data, tpm_size);
         total_length += tpm_size;
 
-        memset(&tx_buf[total_length], TPM_DUMMY_BYTE, phy->latency);
+        memset(&phy->tx_buf[total_length], TPM_DUMMY_BYTE, phy->latency);
 
-        phy->spi_xfer.len = total_length + phy->latency;
+        spi_xfer.len = total_length + phy->latency;
 
-        ret = spi_sync_transfer(dev, &phy->spi_xfer, 1);
+        ret = spi_sync_transfer(dev, &spi_xfer, 1);
         if (ret == 0)
-                ret = rx_buf[total_length + phy->latency - 1];
+                ret = phy->rx_buf[total_length + phy->latency - 1];
 
         return st33zp24_status_to_errno(ret);
 } /* st33zp24_spi_send() */
@@ -154,24 +156,26 @@ static int st33zp24_spi_read8_reg(void *phy_id, u8 tpm_register, u8 *tpm_data,
         int total_length = 0, ret;
         struct st33zp24_spi_phy *phy = phy_id;
         struct spi_device *dev = phy->spi_device;
-        u8 *tx_buf = (u8 *)phy->spi_xfer.tx_buf;
-        u8 *rx_buf = phy->spi_xfer.rx_buf;
+        struct spi_transfer spi_xfer = {
+                .tx_buf = phy->tx_buf,
+                .rx_buf = phy->rx_buf,
+        };
 
         /* Pre-Header */
-        tx_buf[total_length++] = LOCALITY0;
-        tx_buf[total_length++] = tpm_register;
+        phy->tx_buf[total_length++] = LOCALITY0;
+        phy->tx_buf[total_length++] = tpm_register;
 
-        memset(&tx_buf[total_length], TPM_DUMMY_BYTE,
+        memset(&phy->tx_buf[total_length], TPM_DUMMY_BYTE,
                phy->latency + tpm_size);
 
-        phy->spi_xfer.len = total_length + phy->latency + tpm_size;
+        spi_xfer.len = total_length + phy->latency + tpm_size;
 
         /* header + status byte + size of the data + status byte */
-        ret = spi_sync_transfer(dev, &phy->spi_xfer, 1);
+        ret = spi_sync_transfer(dev, &spi_xfer, 1);
         if (tpm_size > 0 && ret == 0) {
-                ret = rx_buf[total_length + phy->latency - 1];
+                ret = phy->rx_buf[total_length + phy->latency - 1];
 
-                memcpy(tpm_data, rx_buf + total_length + phy->latency,
+                memcpy(tpm_data, phy->rx_buf + total_length + phy->latency,
                        tpm_size);
         }
 
@@ -328,9 +332,6 @@ static int st33zp24_spi_probe(struct spi_device *dev)
                         return ret;
         }
 
-        phy->spi_xfer.tx_buf = phy->tx_buf;
-        phy->spi_xfer.rx_buf = phy->rx_buf;
-
         phy->latency = st33zp24_spi_evaluate_latency(phy);
         if (phy->latency <= 0)
                 return -ENODEV;