5 files changed, 19 insertions, 20 deletions

diff --git a/drivers/char/tpm/st33zp24/i2c.c b/drivers/char/tpm/st33zp24/i2c.c
index be5d1abd3e8e..8390c5b54c3b 100644
--- a/drivers/char/tpm/st33zp24/i2c.c
+++ b/drivers/char/tpm/st33zp24/i2c.c
@@ -33,7 +33,7 @@
 
 struct st33zp24_i2c_phy {
         struct i2c_client *client;
-        u8 buf[TPM_BUFSIZE + 1];
+        u8 buf[ST33ZP24_BUFSIZE + 1];
         int io_lpcpd;
 };
 
diff --git a/drivers/char/tpm/st33zp24/spi.c b/drivers/char/tpm/st33zp24/spi.c
index d7909ab287a8..ff019a1e3c68 100644
--- a/drivers/char/tpm/st33zp24/spi.c
+++ b/drivers/char/tpm/st33zp24/spi.c
@@ -63,7 +63,7 @@
  * some latency byte before the answer is available (max 15).
  * We have 2048 + 1024 + 15.
  */
-#define ST33ZP24_SPI_BUFFER_SIZE (TPM_BUFSIZE + (TPM_BUFSIZE / 2) +\
+#define ST33ZP24_SPI_BUFFER_SIZE (ST33ZP24_BUFSIZE + (ST33ZP24_BUFSIZE / 2) +\
                                   MAX_SPI_LATENCY)
 
 
diff --git a/drivers/char/tpm/st33zp24/st33zp24.h b/drivers/char/tpm/st33zp24/st33zp24.h
index 6f4a4198af6a..20da0a84988d 100644
--- a/drivers/char/tpm/st33zp24/st33zp24.h
+++ b/drivers/char/tpm/st33zp24/st33zp24.h
@@ -18,8 +18,8 @@
 #ifndef __LOCAL_ST33ZP24_H__
 #define __LOCAL_ST33ZP24_H__
 
-#define TPM_WRITE_DIRECTION             0x80
-#define TPM_BUFSIZE                     2048
+#define TPM_WRITE_DIRECTION     0x80
+#define ST33ZP24_BUFSIZE        2048
 
 struct st33zp24_dev {
         struct tpm_chip *chip;
diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
index 9086edc9066b..3b490d9d90e7 100644
--- a/drivers/char/tpm/tpm_i2c_infineon.c
+++ b/drivers/char/tpm/tpm_i2c_infineon.c
@@ -26,8 +26,7 @@
 #include <linux/wait.h>
 #include "tpm.h"
 
-/* max. buffer size supported by our TPM */
-#define TPM_BUFSIZE 1260
+#define TPM_I2C_INFINEON_BUFSIZE 1260
 
 /* max. number of iterations after I2C NAK */
 #define MAX_COUNT 3
@@ -63,11 +62,13 @@ enum i2c_chip_type {
         UNKNOWN,
 };
 
-/* Structure to store I2C TPM specific stuff */
 struct tpm_inf_dev {
         struct i2c_client *client;
         int locality;
-        u8 buf[TPM_BUFSIZE + sizeof(u8)]; /* max. buffer size + addr */
+        /* In addition to the data itself, the buffer must fit the 7-bit I2C
+         * address and the direction bit.
+         */
+        u8 buf[TPM_I2C_INFINEON_BUFSIZE + 1];
         struct tpm_chip *chip;
         enum i2c_chip_type chip_type;
         unsigned int adapterlimit;
@@ -219,7 +220,7 @@ static int iic_tpm_write_generic(u8 addr, u8 *buffer, size_t len,
                 .buf = tpm_dev.buf
         };
 
-        if (len > TPM_BUFSIZE)
+        if (len > TPM_I2C_INFINEON_BUFSIZE)
                 return -EINVAL;
 
         if (!tpm_dev.client->adapter->algo->master_xfer)
@@ -527,8 +528,8 @@ static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len)
         u8 retries = 0;
         u8 sts = TPM_STS_GO;
 
-        if (len > TPM_BUFSIZE)
-                return -E2BIG;  /* command is too long for our tpm, sorry */
+        if (len > TPM_I2C_INFINEON_BUFSIZE)
+                return -E2BIG;
 
         if (request_locality(chip, 0) < 0)
                 return -EBUSY;
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
index 217f7f1cbde8..5700cc2ddee1 100644
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -35,14 +35,12 @@
 #include "tpm.h"
 
 /* I2C interface offsets */
-#define TPM_STS                0x00
-#define TPM_BURST_COUNT        0x01
-#define TPM_DATA_FIFO_W        0x20
-#define TPM_DATA_FIFO_R        0x40
-#define TPM_VID_DID_RID        0x60
-/* TPM command header size */
-#define TPM_HEADER_SIZE        10
-#define TPM_RETRY      5
+#define TPM_STS                 0x00
+#define TPM_BURST_COUNT         0x01
+#define TPM_DATA_FIFO_W         0x20
+#define TPM_DATA_FIFO_R         0x40
+#define TPM_VID_DID_RID         0x60
+#define TPM_I2C_RETRIES         5
 /*
  * I2C bus device maximum buffer size w/o counting I2C address or command
  * i.e. max size required for I2C write is 34 = addr, command, 32 bytes data
@@ -292,7 +290,7 @@ static int i2c_nuvoton_recv(struct tpm_chip *chip, u8 *buf, size_t count)
                 dev_err(dev, "%s() count < header size\n", __func__);
                 return -EIO;
         }
-        for (retries = 0; retries < TPM_RETRY; retries++) {
+        for (retries = 0; retries < TPM_I2C_RETRIES; retries++) {
                 if (retries > 0) {
                         /* if this is not the first trial, set responseRetry */
                         i2c_nuvoton_write_status(client,