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Date: Thu, 30 Sep 2010 16:09:22 -0300
From: Rajiv Andrade <srajiv@...ux.vnet.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: jmorris@...ei.org, joe@...ches.com, christophe-h.ricard@...com
Subject: [PATCH 3/3] TPM: Add missing break and neatening
From: Joe Perches <joe@...ches.com>
Add missing break in wait_until_good_shape
Use init; while (test) loops not for(init;test;)
Calculate bytes to transfer using if and min_t not multiple ?:
Miscellaneous function whitespace aliging
Signed-off-by: Joe Perches <joe@...ches.com>
Signed-off-by: Rajiv Andrade <srajiv@...ux.vnet.ibm.com>
---
drivers/char/tpm/tpm_stm_st19_i2c.c | 158 +++++++++++++++++++----------------
1 files changed, 85 insertions(+), 73 deletions(-)
diff --git a/drivers/char/tpm/tpm_stm_st19_i2c.c b/drivers/char/tpm/tpm_stm_st19_i2c.c
index cdf2eb3..4b1ed05 100644
--- a/drivers/char/tpm/tpm_stm_st19_i2c.c
+++ b/drivers/char/tpm/tpm_stm_st19_i2c.c
@@ -158,8 +158,10 @@ static int wait_until_good_shape(void)
else if (!signal_pending(current)) {
ret = schedule_timeout(time);
wait_time += time;
- } else
+ } else {
ret = -ERESTARTSYS;
+ break;
+ }
} while (1);
finish_wait(&queue, &__wait);
@@ -204,10 +206,10 @@ static int wait_event_interruptible_on_gpio(wait_queue_head_t queue,
else if (wait_time >= timeout)
break;
else if (!signal_pending(current)) {
- ret =
- schedule_timeout(msecs_to_jiffies
- (TICK_GPIO_SPOOLING));
- wait_time += msecs_to_jiffies(TICK_GPIO_SPOOLING);
+ int time = msecs_to_jiffies(TICK_GPIO_SPOOLING);
+
+ ret = schedule_timeout(time);
+ wait_time += time;
} else {
ret = -ERESTARTSYS;
break;
@@ -286,9 +288,9 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf,
/* sending data (data_avail_pin hight) */
/* If data are available, we read the data */
init_waitqueue_head(&pin_infos->write_queue);
- pin = wait_event_interruptible_on_gpio(pin_infos->write_queue,
- tpm_calc_ordinal_duration
- (chip, ordinal));
+ pin = wait_event_interruptible_on_gpio(
+ pin_infos->write_queue,
+ tpm_calc_ordinal_duration(chip, ordinal));
if (pin < 0) {
ret = pin;
goto end;
@@ -297,25 +299,30 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf,
client->flags = I2C_M_RD;
size = TPM_HEADER_SIZE;
- for (i = 0; pin == DATA_ON && i < size;) {
- ret = i2c_master_recv(client,
- pin_infos->tpm_i2c_buffer[1],
- (i == 0) ? TPM_HEADER_SIZE :
- count - i > TPM_I2C_BLOCK_SIZE ?
- TPM_I2C_BLOCK_SIZE : count - i);
+ i = 0;
+ while (i < size && pin == DATA_ON) {
+ int bytes;
+
+ if (i == 0)
+ bytes = TPM_HEADER_SIZE;
+ else
+ bytes = min_t(int, count - i, TPM_I2C_BLOCK_SIZE);
+
+ ret = i2c_master_recv(client, pin_infos->tpm_i2c_buffer[1],
+ bytes);
if (ret < 0)
goto end;
- if (i == 0)
- size =
- responseSize(pin_infos->tpm_i2c_buffer[1], count);
- (i == 0) ? (i += TPM_HEADER_SIZE) : (i += TPM_I2C_BLOCK_SIZE);
+ if (i == 0) {
+ size = responseSize(pin_infos->tpm_i2c_buffer[1],
+ count);
+ i += TPM_HEADER_SIZE;
+ } else
+ i += TPM_I2C_BLOCK_SIZE;
if (i < size)
- pin =
- wait_event_interruptible_on_gpio(pin_infos->
- write_queue,
- msecs_to_jiffies
- (TPM_I2C_SHORT));
+ pin = wait_event_interruptible_on_gpio(
+ pin_infos->write_queue,
+ msecs_to_jiffies(TPM_I2C_SHORT));
}
pin = wait_event_interruptible_on_gpio(pin_infos->write_queue,
@@ -325,36 +332,41 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf,
client->flags = 0;
size = TPM_HEADER_SIZE;
- for (i = 0; i < size && pin == COMMAND_ON;) {
- memcpy(pin_infos->tpm_i2c_buffer[0], buf + i,
- (i == 0) ? TPM_HEADER_SIZE : count - i >
- TPM_I2C_BLOCK_SIZE ? TPM_I2C_BLOCK_SIZE : count - i);
+ i = 0;
+ while (i < size && pin == COMMAND_ON) {
+ int bytes;
+
+ if (i == 0)
+ bytes = TPM_HEADER_SIZE;
+ else
+ bytes = min_t(int, count - i, TPM_I2C_BLOCK_SIZE);
+
+ memcpy(pin_infos->tpm_i2c_buffer[0], buf + i, bytes);
if (i == 0) {
size = responseSize(buf, count);
- size = (size < count ? size : count);
+ size = size < count ? size : count;
}
- ret =
- i2c_master_send(client,
- pin_infos->tpm_i2c_buffer[0],
- count >= TPM_HEADER_SIZE ? (i ==
- 0) ?
- TPM_HEADER_SIZE : count - i >
- TPM_I2C_BLOCK_SIZE ? TPM_I2C_BLOCK_SIZE :
- count - i : count);
+
+ if (count < TPM_HEADER_SIZE)
+ bytes = count;
+
+ ret = i2c_master_send(client, pin_infos->tpm_i2c_buffer[0],
+ bytes);
if (ret < 0) {
pr_info("Failed to send data\n");
goto end;
}
- (i == 0) ? (i += TPM_HEADER_SIZE) : (i += TPM_I2C_BLOCK_SIZE);
+ if (i == 0)
+ i += TPM_HEADER_SIZE;
+ else
+ i += TPM_I2C_BLOCK_SIZE;
/* Wait for AcceptCmd signal hight */
if (i < size)
- pin =
- wait_event_interruptible_on_gpio(pin_infos->
- write_queue,
- msecs_to_jiffies
- (TPM_I2C_SHORT));
+ pin = wait_event_interruptible_on_gpio(
+ pin_infos->write_queue,
+ msecs_to_jiffies(TPM_I2C_SHORT));
if (pin != COMMAND_ON) {
pr_info("Failed to read gpio pin (AcceptCmd)\n");
@@ -362,6 +374,7 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf,
goto end;
}
}
+
if (i == 0) {
pr_info("Failed to read gpio pin (AcceptCmd)\n");
ret = -EIO;
@@ -412,49 +425,48 @@ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf,
/* Spool on the good gpio as long as pin GPIO 3 not HIGHT */
init_waitqueue_head(&chip->vendor.read_queue);
- pin = wait_event_interruptible_on_gpio(chip->vendor.read_queue,
- tpm_calc_ordinal_duration
- (chip, TPM_I2C_ORDINAL_LONG));
+ pin = wait_event_interruptible_on_gpio(
+ chip->vendor.read_queue,
+ tpm_calc_ordinal_duration(chip, TPM_I2C_ORDINAL_LONG));
size = TPM_HEADER_SIZE;
- for (i = 0; i < size && pin == DATA_ON;) {
- ret =
- i2c_master_recv(client,
- pin_infos->tpm_i2c_buffer[1],
- (count >= TPM_HEADER_SIZE ? i ==
- 0 ? TPM_HEADER_SIZE : (size - i) >
- TPM_I2C_BLOCK_SIZE ? TPM_I2C_BLOCK_SIZE :
- size - i : count));
+ i = 0;
+ while (i < size && pin == DATA_ON) {
+ int bytes;
+
+ if (count < TPM_HEADER_SIZE)
+ bytes = count;
+ else if (i == 0)
+ bytes = TPM_HEADER_SIZE;
+ else
+ bytes = min_t(int, size - i, TPM_I2C_BLOCK_SIZE);
+
+ ret = i2c_master_recv(client, pin_infos->tpm_i2c_buffer[1],
+ bytes);
if (ret < 0) {
pr_info("Failed to read gpio pin (DataAvailable)\n");
goto end;
}
- if (buf != NULL) {
- memcpy(buf + i, pin_infos->tpm_i2c_buffer[1],
- (count >= TPM_HEADER_SIZE ? i == 0 ?
- TPM_HEADER_SIZE : (size - i) >
- TPM_I2C_BLOCK_SIZE ? TPM_I2C_BLOCK_SIZE : size -
- i : count));
-
- if (i == 0) {
- size = responseSize(buf, size);
- if (size > count)
- size = count;
- }
- } else {
+ if (!buf) {
pr_info("read buffer is NULL\n");
goto end;
}
- (i == 0) ? (i += TPM_HEADER_SIZE) : (i += TPM_I2C_BLOCK_SIZE);
+ memcpy(buf + i, pin_infos->tpm_i2c_buffer[1], size);
+
+ if (i == 0) {
+ size = responseSize(buf, size);
+ if (size > count)
+ size = count;
+ i += TPM_HEADER_SIZE;
+ } else
+ i += TPM_I2C_BLOCK_SIZE;
if (i < size)
- pin =
- wait_event_interruptible_on_gpio(chip->vendor.
- read_queue,
- msecs_to_jiffies
- (TPM_I2C_SHORT));
+ pin = wait_event_interruptible_on_gpio(
+ chip->vendor.read_queue,
+ msecs_to_jiffies(TPM_I2C_SHORT));
}
if (i == 0) {
@@ -532,7 +544,7 @@ static ssize_t tpm_st19_i2c_ioctl(struct inode *inode, struct file *file,
return -ENOSYS;
case TPMIOC_TRANSMIT:
if (copy_from_user(pin_infos->tpm_i2c_buffer[0],
- (const char *)arg, TPM_HEADER_SIZE))
+ (const char *)arg, TPM_HEADER_SIZE))
return -EFAULT;
in_size = responseSize(pin_infos->tpm_i2c_buffer[0],
TPM_HEADER_SIZE);
--
1.7.2.2
--
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