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Date: Fri, 21 Dec 2012 11:04:27 +0100
From: Jean Delvare <khali@...ux-fr.org>
To: Laurent Navet <laurent.navet@...il.com>
Cc: w.sang@...gutronix.de, ben-linux@...ff.org,
linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers: i2c-nforce2: fix coding style issues
Hi Laurent,
On Wed, 19 Dec 2012 22:06:11 +0100, Laurent Navet wrote:
> avoid these checkpatch.pl issues :
> - ERROR: "foo * bar" should be "foo *bar"
> - ERROR: switch and case should be at the same indent
> - ERROR: "(foo*)" should be "(foo *)"
> - ERROR: do not use assignment in if condition
> - ERROR: space required before the open parenthesis '('
> - WARNING: suspect code indent for conditional statements
> - WARNING: quoted string split across lines
> - WARNING: space prohibited between function name and open parenthesis '('
>
> Signed-off-by: Laurent Navet <laurent.navet@...il.com>
> ---
> drivers/i2c/busses/i2c-nforce2.c | 149 +++++++++++++++++++-------------------
> 1 file changed, 75 insertions(+), 74 deletions(-)
Thanks for the update. I have a few more comments:
>
> diff --git a/drivers/i2c/busses/i2c-nforce2.c b/drivers/i2c/busses/i2c-nforce2.c
> index 392303b..03f32c5 100644
> --- a/drivers/i2c/busses/i2c-nforce2.c
> +++ b/drivers/i2c/busses/i2c-nforce2.c
> @@ -60,7 +60,7 @@
> #include <linux/io.h>
>
> MODULE_LICENSE("GPL");
> -MODULE_AUTHOR ("Hans-Frieder Vogt <hfvogt@....net>");
> +MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@....net>");
> MODULE_DESCRIPTION("nForce2/3/4/5xx SMBus driver");
>
>
> @@ -188,9 +188,9 @@ static int nforce2_check_status(struct i2c_adapter *adap)
> }
>
> /* Return negative errno on error */
> -static s32 nforce2_access(struct i2c_adapter * adap, u16 addr,
> +static s32 nforce2_access(struct i2c_adapter *adap, u16 addr,
> unsigned short flags, char read_write,
> - u8 command, int size, union i2c_smbus_data * data)
> + u8 command, int size, union i2c_smbus_data *data)
> {
> struct nforce2_smbus *smbus = adap->algo_data;
> unsigned char protocol, pec;
> @@ -203,55 +203,54 @@ static s32 nforce2_access(struct i2c_adapter * adap, u16 addr,
>
> switch (size) {
>
While you're here, please drop this useless blank line.
> - case I2C_SMBUS_QUICK:
> - protocol |= NVIDIA_SMB_PRTCL_QUICK;
> - read_write = I2C_SMBUS_WRITE;
> - break;
> + case I2C_SMBUS_QUICK:
> + protocol |= NVIDIA_SMB_PRTCL_QUICK;
> + read_write = I2C_SMBUS_WRITE;
> + break;
>
> - case I2C_SMBUS_BYTE:
> - if (read_write == I2C_SMBUS_WRITE)
> - outb_p(command, NVIDIA_SMB_CMD);
> - protocol |= NVIDIA_SMB_PRTCL_BYTE;
> - break;
> -
> - case I2C_SMBUS_BYTE_DATA:
> - outb_p(command, NVIDIA_SMB_CMD);
> - if (read_write == I2C_SMBUS_WRITE)
> - outb_p(data->byte, NVIDIA_SMB_DATA);
> - protocol |= NVIDIA_SMB_PRTCL_BYTE_DATA;
> - break;
> -
> - case I2C_SMBUS_WORD_DATA:
> - outb_p(command, NVIDIA_SMB_CMD);
> - if (read_write == I2C_SMBUS_WRITE) {
> - outb_p(data->word, NVIDIA_SMB_DATA);
> - outb_p(data->word >> 8, NVIDIA_SMB_DATA+1);
> - }
> - protocol |= NVIDIA_SMB_PRTCL_WORD_DATA | pec;
> - break;
> -
> - case I2C_SMBUS_BLOCK_DATA:
> + case I2C_SMBUS_BYTE:
> + if (read_write == I2C_SMBUS_WRITE)
> outb_p(command, NVIDIA_SMB_CMD);
> - if (read_write == I2C_SMBUS_WRITE) {
> - len = data->block[0];
> - if ((len == 0) || (len > I2C_SMBUS_BLOCK_MAX)) {
> - dev_err(&adap->dev,
> - "Transaction failed "
> - "(requested block size: %d)\n",
> - len);
> - return -EINVAL;
> - }
> - outb_p(len, NVIDIA_SMB_BCNT);
> - for (i = 0; i < I2C_SMBUS_BLOCK_MAX; i++)
> - outb_p(data->block[i + 1],
> - NVIDIA_SMB_DATA+i);
> + protocol |= NVIDIA_SMB_PRTCL_BYTE;
> + break;
> +
> + case I2C_SMBUS_BYTE_DATA:
> + outb_p(command, NVIDIA_SMB_CMD);
> + if (read_write == I2C_SMBUS_WRITE)
> + outb_p(data->byte, NVIDIA_SMB_DATA);
> + protocol |= NVIDIA_SMB_PRTCL_BYTE_DATA;
> + break;
> +
> + case I2C_SMBUS_WORD_DATA:
> + outb_p(command, NVIDIA_SMB_CMD);
> + if (read_write == I2C_SMBUS_WRITE) {
> + outb_p(data->word, NVIDIA_SMB_DATA);
> + outb_p(data->word >> 8, NVIDIA_SMB_DATA+1);
While this isn't reported by checkpatch, I'd appreciate if you could
add spaces around "+" on lines you're already touching.
> + }
> + protocol |= NVIDIA_SMB_PRTCL_WORD_DATA | pec;
> + break;
> +
> + case I2C_SMBUS_BLOCK_DATA:
> + outb_p(command, NVIDIA_SMB_CMD);
> + if (read_write == I2C_SMBUS_WRITE) {
> + len = data->block[0];
> + if ((len == 0) || (len > I2C_SMBUS_BLOCK_MAX)) {
> + dev_err(&adap->dev,
> + "Transaction failed (requested block size: %d)\n",
> + len);
Your indentation is wrong here, the last two lines should be aligned on
the opening parenthesis of the previous line.
> + return -EINVAL;
> }
> - protocol |= NVIDIA_SMB_PRTCL_BLOCK_DATA | pec;
> - break;
> + outb_p(len, NVIDIA_SMB_BCNT);
> + for (i = 0; i < I2C_SMBUS_BLOCK_MAX; i++)
> + outb_p(data->block[i + 1],
> + NVIDIA_SMB_DATA+i);
> + }
> + protocol |= NVIDIA_SMB_PRTCL_BLOCK_DATA | pec;
> + break;
>
> - default:
> - dev_err(&adap->dev, "Unsupported transaction %d\n", size);
> - return -EOPNOTSUPP;
> + default:
> + dev_err(&adap->dev, "Unsupported transaction %d\n", size);
> + return -EOPNOTSUPP;
> }
>
> outb_p((addr & 0x7f) << 1, NVIDIA_SMB_ADDR);
> @@ -266,27 +265,28 @@ static s32 nforce2_access(struct i2c_adapter * adap, u16 addr,
>
> switch (size) {
>
While you're here, please drop this useless blank line.
> - case I2C_SMBUS_BYTE:
> - case I2C_SMBUS_BYTE_DATA:
> - data->byte = inb_p(NVIDIA_SMB_DATA);
> - break;
> -
> - case I2C_SMBUS_WORD_DATA:
> - data->word = inb_p(NVIDIA_SMB_DATA) | (inb_p(NVIDIA_SMB_DATA+1) << 8);
> - break;
> -
> - case I2C_SMBUS_BLOCK_DATA:
> - len = inb_p(NVIDIA_SMB_BCNT);
> - if ((len <= 0) || (len > I2C_SMBUS_BLOCK_MAX)) {
> - dev_err(&adap->dev, "Transaction failed "
> - "(received block size: 0x%02x)\n",
> - len);
> - return -EPROTO;
> - }
> - for (i = 0; i < len; i++)
> - data->block[i+1] = inb_p(NVIDIA_SMB_DATA + i);
> - data->block[0] = len;
> - break;
> + case I2C_SMBUS_BYTE:
> + case I2C_SMBUS_BYTE_DATA:
> + data->byte = inb_p(NVIDIA_SMB_DATA);
> + break;
> +
> + case I2C_SMBUS_WORD_DATA:
> + data->word = inb_p(NVIDIA_SMB_DATA) |
> + (inb_p(NVIDIA_SMB_DATA+1) << 8);
Please add a few spaces to align on the = sign:
data->word = inb_p(NVIDIA_SMB_DATA) |
(inb_p(NVIDIA_SMB_DATA + 1) << 8);
> + break;
> +
> + case I2C_SMBUS_BLOCK_DATA:
> + len = inb_p(NVIDIA_SMB_BCNT);
> + if ((len <= 0) || (len > I2C_SMBUS_BLOCK_MAX)) {
> + dev_err(&adap->dev,
> + "Transaction failed (received block size: 0x%02x)\n",
> + len);
Your indentation is wrong here, the last two lines should be aligned on
the opening parenthesis of the previous line.
> + return -EPROTO;
> + }
> + for (i = 0; i < len; i++)
> + data->block[i+1] = inb_p(NVIDIA_SMB_DATA + i);
> + data->block[0] = len;
> + break;
> }
>
> return 0;
> @@ -299,7 +299,7 @@ static u32 nforce2_func(struct i2c_adapter *adapter)
> return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
> I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
> I2C_FUNC_SMBUS_PEC |
> - (((struct nforce2_smbus*)adapter->algo_data)->blockops ?
> + (((struct nforce2_smbus *)adapter->algo_data)->blockops ?
> I2C_FUNC_SMBUS_BLOCK_DATA : 0);
> }
>
> @@ -327,10 +327,10 @@ static DEFINE_PCI_DEVICE_TABLE(nforce2_ids) = {
> { 0 }
> };
>
> -MODULE_DEVICE_TABLE (pci, nforce2_ids);
> +MODULE_DEVICE_TABLE(pci, nforce2_ids);
>
>
> -static int __devinit nforce2_probe_smb (struct pci_dev *dev, int bar,
> +static int __devinit nforce2_probe_smb(struct pci_dev *dev, int bar,
> int alt_reg, struct nforce2_smbus *smbus, const char *name)
This change causes a reject because __devinit was removed by another
patch:
http://git.pengutronix.de/?p=wsa/linux.git;a=commit;h=cda2826abea9a78d21b5e35d71db328657b756e5
The space issue was fixed in that patch too so you can simply omit that
change from your own patch to avoid the reject.
> {
> int error;
> @@ -388,11 +388,12 @@ static int __devinit nforce2_probe(struct pci_dev *dev, const struct pci_device_
> int res1, res2;
>
> /* we support 2 SMBus adapters */
> - if (!(smbuses = kzalloc(2*sizeof(struct nforce2_smbus), GFP_KERNEL)))
> + smbuses = kzalloc(2*sizeof(struct nforce2_smbus), GFP_KERNEL);
Spaces around "*" please.
> + if (!smbuses)
> return -ENOMEM;
> pci_set_drvdata(dev, smbuses);
>
> - switch(dev->device) {
> + switch (dev->device) {
> case PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS:
> case PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SMBUS:
> case PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SMBUS:
Other than these minor details, this looks good. You could fix the
following warning as well:
WARNING: line over 80 characters
#380: FILE: i2c/busses/i2c-nforce2.c:380:
+ dev_info(&smbus->adapter.dev, "nForce2 SMBus adapter at %#x\n", smbus->base);
It's an easy one. Please resubmit with the requested changes and then
Wolfram can apply your patch. Thanks for the good work!
--
Jean Delvare
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