[PATCH v2] tpm/st33zp24: Fix the name collisions in tpm_st33zp24_spi and tpm_i2c_infineon

[Jarkko Sakkinen]

Rename TPM_BUFSIZE defined in drivers/char/tpm/st33zp24/st33zp24.h to
ST33ZP24_BUFSIZE.

Rename TPM_BUFSIZE defined in drivers/char/tpm/tpm_i2c_infineon.c to
TPM_I2C_INFINEON_BUFSIZE.

Cc: sta...@vger.kernel.org
Fixes: bf38b8710892 ("tpm/tpm_i2c_stm_st33: Split tpm_i2c_tpm_st33 in 2 layers 
(core + phy)")
Fixes: aad628c1d91a ("char/tpm: Add new driver for Infineon I2C TIS TPM")
Signed-off-by: Jarkko Sakkinen <jarkko.sakki...@linux.intel.com>
---
v2: Fix also the name collision in tpm_ic2_infineon.
 drivers/char/tpm/st33zp24/i2c.c      |  2 +-
 drivers/char/tpm/st33zp24/spi.c      |  2 +-
 drivers/char/tpm/st33zp24/st33zp24.h |  4 ++--
 drivers/char/tpm/tpm_i2c_infineon.c  | 15 ++++++++-------
 4 files changed, 12 insertions(+), 11 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..b9d5a1dda8d2 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_MAX_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_MAX_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_MAX_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;
-- 
2.19.1