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Message-ID: <20160609140140.GI24234@mail.corp.redhat.com>
Date: Thu, 9 Jun 2016 16:01:40 +0200
From: Benjamin Tissoires <benjamin.tissoires@...hat.com>
To: Corey Minyard <minyard@....org>
Cc: Jean Delvare <jdelvare@...e.com>, linux-i2c@...r.kernel.org,
linux-kernel@...r.kernel.org, Corey Minyard <cminyard@...sta.com>
Subject: Re: [v2,07/10] i2c-i801: Fix some inconsistent variable names
On May 29 2016 or thereabouts, Corey Minyard wrote:
> From: Corey Minyard <cminyard@...sta.com>
>
> The priv->cmd is called subcmd elsewhere, and that's a more
> appropriate name for it, so rename it.
>
> The "size" parameter passed in to i801_access is passed to other
> functions and those name is "command". This is confusing with the
> "command" parameter passed in to i801_access. Rename it to "size"
> everywhere.
Well, this parameter contains defines that are declared as SMBus
transaction types in i2c.h. So even if they are passed as the size
parameter in i2c_access, they actually are commands. So I am not sure it
is good to rename them as "size".
Cheers,
Benjamin
>
> Signed-off-by: Corey Minyard <cminyard@...sta.com>
> ---
> drivers/i2c/busses/i2c-i801.c | 29 ++++++++++++++---------------
> 1 file changed, 14 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
> index ae1e60a..b415948 100644
> --- a/drivers/i2c/busses/i2c-i801.c
> +++ b/drivers/i2c/busses/i2c-i801.c
> @@ -233,7 +233,7 @@ struct i801_priv {
> u8 status;
>
> /* Command state used by isr for byte-by-byte block transactions */
> - u8 cmd;
> + u8 subcmd;
> bool is_read;
> int count;
> int len;
> @@ -468,7 +468,7 @@ static void i801_isr_byte_done(struct i801_priv *priv)
> {
> if (priv->is_read) {
> /* For SMBus block reads, length is received with first byte */
> - if (((priv->cmd & 0x1c) == I801_BLOCK_DATA) &&
> + if (((priv->subcmd & 0x1c) == I801_BLOCK_DATA) &&
> (priv->count == 0)) {
> priv->len = inb_p(SMBHSTDAT0(priv));
> if (priv->len < 1 || priv->len > I2C_SMBUS_BLOCK_MAX) {
> @@ -494,7 +494,7 @@ static void i801_isr_byte_done(struct i801_priv *priv)
>
> /* Set LAST_BYTE for last byte of read transaction */
> if (priv->count == priv->len - 1)
> - outb_p(priv->cmd | SMBHSTCNT_LAST_BYTE,
> + outb_p(priv->subcmd | SMBHSTCNT_LAST_BYTE,
> SMBHSTCNT(priv));
> } else if (priv->count < priv->len - 1) {
> /* Write next byte, except for IRQ after last byte */
> @@ -555,7 +555,7 @@ static irqreturn_t i801_isr(int irq, void *dev_id)
> */
> static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
> union i2c_smbus_data *data,
> - bool is_read, int command)
> + bool is_read, int size)
> {
> int i, len;
> int smbcmd;
> @@ -570,7 +570,7 @@ static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
> outb_p(data->block[1], SMBBLKDAT(priv));
> }
>
> - if (command == I2C_SMBUS_I2C_BLOCK_DATA && is_read)
> + if (size == I2C_SMBUS_I2C_BLOCK_DATA && is_read)
> smbcmd = I801_I2C_BLOCK_DATA;
> else
> smbcmd = I801_BLOCK_DATA;
> @@ -579,12 +579,12 @@ static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
> priv->is_read = is_read;
> if (len == 1 && is_read)
> smbcmd |= SMBHSTCNT_LAST_BYTE;
> - priv->cmd = smbcmd | SMBHSTCNT_INTREN;
> + priv->subcmd = smbcmd | SMBHSTCNT_INTREN;
> priv->len = len;
> priv->count = 0;
> priv->data = &data->block[1];
>
> - outb_p(priv->cmd | SMBHSTCNT_START, SMBHSTCNT(priv));
> + outb_p(priv->subcmd | SMBHSTCNT_START, SMBHSTCNT(priv));
> result = wait_event_timeout(priv->waitq,
> (status = priv->status),
> adap->timeout);
> @@ -610,8 +610,7 @@ static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
> if (status)
> return status;
>
> - if (i == 1 && is_read
> - && command != I2C_SMBUS_I2C_BLOCK_DATA) {
> + if (i == 1 && is_read && size != I2C_SMBUS_I2C_BLOCK_DATA) {
> priv->len = inb_p(SMBHSTDAT0(priv));
> if (priv->len < 1 || priv->len > I2C_SMBUS_BLOCK_MAX)
> return -EPROTO;
> @@ -642,13 +641,13 @@ static int i801_set_block_buffer_mode(struct i801_priv *priv)
> /* Block transaction function */
> static int i801_block_transaction(struct i801_priv *priv, unsigned short flags,
> union i2c_smbus_data *data, bool is_read,
> - int command)
> + int size)
> {
> int result = 0;
> int hwpec = (priv->features & FEATURE_SMBUS_PEC)
> && (flags & I2C_CLIENT_PEC)
> - && command != I2C_SMBUS_QUICK
> - && command != I2C_SMBUS_I2C_BLOCK_DATA;
> + && size != I2C_SMBUS_QUICK
> + && size != I2C_SMBUS_I2C_BLOCK_DATA;
>
> if (hwpec) /* enable/disable hardware PEC */
> outb_p(inb_p(SMBAUXCTL(priv)) | SMBAUXCTL_CRC,
> @@ -657,7 +656,7 @@ static int i801_block_transaction(struct i801_priv *priv, unsigned short flags,
> outb_p(inb_p(SMBAUXCTL(priv)) & (~SMBAUXCTL_CRC),
> SMBAUXCTL(priv));
>
> - if (!is_read || command == I2C_SMBUS_I2C_BLOCK_DATA) {
> + if (!is_read || size == I2C_SMBUS_I2C_BLOCK_DATA) {
> if (data->block[0] < 1)
> data->block[0] = 1;
> if (data->block[0] > I2C_SMBUS_BLOCK_MAX)
> @@ -670,13 +669,13 @@ static int i801_block_transaction(struct i801_priv *priv, unsigned short flags,
> SMBus (not I2C) block transactions, even though the datasheet
> doesn't mention this limitation. */
> if ((priv->features & FEATURE_BLOCK_BUFFER)
> - && command != I2C_SMBUS_I2C_BLOCK_DATA
> + && size != I2C_SMBUS_I2C_BLOCK_DATA
> && i801_set_block_buffer_mode(priv) == 0)
> result = i801_block_transaction_by_block(priv, data, is_read,
> hwpec);
> else
> result = i801_block_transaction_byte_by_byte(priv, data,
> - is_read, command);
> + is_read, size);
>
> /*
> * Some BIOSes don't like it when PEC is enabled at reboot or
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