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Subject[PATCH] [i2c]: Fix some gcc 4.0 compile failures and warnings
From: Mickey Stein
Versions: linux-2.6.11-rc4-bk11, gcc4 (GCC) 4.0.0 20050217 (latest fc
rawhide from 19Feb DL)

gcc 4.0.x cvs seems to dislike "include/linux/i2c.h file" and others
due to a current gcc 4.0.x change having to do with
array declarations.

Example error msg: include/linux/i2c.h:{55,194} error: array type has
incomplete element type
A. Daplas has recently done a workaround for this on another header
file. A thread discussing this
can be found by following the link below:

http://gcc.gnu.org/ml/gcc/2005-02/msg00053.html

The patch changes the array(struct i2c_msg) declaration used by
*i2c_transfer and *master_xfer
from "struct i2c_msg msg[]" format to "struct i2c_msg *msg".

After some grepping, I came up with about a dozen files that used the
format disliked by gcc4 that're addressed by the attached patch.
Tested on gcc 3.x & gcc 4.x by configuring kernel with all i2c switches
enabled as module, and saw no errors or warnings in i2c.

Signed-off-by: Mickey Stein <yekkim@pacbell.net>

--- ./include/linux/i2c.h.sav 2005-02-23 10:35:36.000000000 -0800
+++ ./include/linux/i2c.h 2005-02-23 10:46:23.000000000 -0800
@@ -55,7 +55,7 @@

/* Transfer num messages.
*/
-extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg msg[],int num);
+extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);

/*
* Some adapter types (i.e. PCF 8584 based ones) may support slave behaviuor.
@@ -194,7 +194,7 @@
to NULL. If an adapter algorithm can do SMBus access, set
smbus_xfer. If set to NULL, the SMBus protocol is simulated
using common I2C messages */
- int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg msgs[],
+ int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs,
int num);
int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
unsigned short flags, char read_write,
--- ./drivers/i2c/busses/i2c-iop3xx.c.sav 2005-02-23 10:36:21.000000000 -0800
+++ ./drivers/i2c/busses/i2c-iop3xx.c 2005-02-23 10:47:36.000000000 -0800
@@ -361,7 +361,7 @@
* master_xfer() - main read/write entry
*/
static int
-iop3xx_i2c_master_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[],
+iop3xx_i2c_master_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs,
int num)
{
struct i2c_algo_iop3xx_data *iop3xx_adap = i2c_adap->algo_data;
--- ./drivers/i2c/i2c-core.c.sav 2005-02-23 10:34:59.000000000 -0800
+++ ./drivers/i2c/i2c-core.c 2005-02-23 10:49:18.000000000 -0800
@@ -583,7 +583,7 @@
* ----------------------------------------------------
*/

-int i2c_transfer(struct i2c_adapter * adap, struct i2c_msg msgs[],int num)
+int i2c_transfer(struct i2c_adapter * adap, struct i2c_msg *msgs, int num)
{
int ret;

--- ./drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c.sav 2005-02-23 10:39:53.000000000 -0800
+++ ./drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c 2005-02-23 10:50:07.000000000 -0800
@@ -252,7 +252,7 @@
return rcv_len;
}

-static int master_xfer(struct i2c_adapter* adapter, struct i2c_msg msg[], int num)
+static int master_xfer(struct i2c_adapter* adapter, struct i2c_msg *msg, int num)
{
struct ttusb *ttusb = i2c_get_adapdata(adapter);
int i = 0;
--- ./drivers/media/dvb/b2c2/skystar2.c.sav 2005-02-23 10:40:33.000000000 -0800
+++ ./drivers/media/dvb/b2c2/skystar2.c 2005-02-23 10:50:42.000000000 -0800
@@ -293,7 +293,7 @@
return buf - start;
}

-static int master_xfer(struct i2c_adapter* adapter, struct i2c_msg msgs[], int num)
+static int master_xfer(struct i2c_adapter* adapter, struct i2c_msg *msgs, int num)
{
struct adapter *tmp = i2c_get_adapdata(adapter);
int i, ret = 0;
--- ./Documentation/i2c/writing-clients.sav 2005-02-23 10:42:00.000000000 -0800
+++ ./Documentation/i2c/writing-clients 2005-02-23 10:42:30.000000000 -0800
@@ -642,7 +642,7 @@
parameter contains the bytes the read/write, the third the length of the
buffer. Returned is the actual number of bytes read/written.

- extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg msg[],
+ extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msg,
int num);

This sends a series of messages. Each message can be a read or write,
--- ./include/media/saa7146.h.sav 2005-02-23 12:01:51.000000000 -0800
+++ ./include/media/saa7146.h 2005-02-23 12:19:38.000000000 -0800
@@ -157,7 +157,7 @@

/* from saa7146_i2c.c */
int saa7146_i2c_adapter_prepare(struct saa7146_dev *dev, struct i2c_adapter *i2c_adapter, u32 bitrate);
-int saa7146_i2c_transfer(struct saa7146_dev *saa, const struct i2c_msg msgs[], int num, int retries);
+int saa7146_i2c_transfer(struct saa7146_dev *saa, const struct *i2c_msg msgs, int num, int retries);

/* from saa7146_core.c */
extern struct list_head saa7146_devices;
--- ./drivers/i2c/busses/i2c-s3c2410.c.sav 2005-02-23 12:03:29.000000000 -0800
+++ ./drivers/i2c/busses/i2c-s3c2410.c 2005-02-23 12:20:31.000000000 -0800
@@ -483,7 +483,7 @@
* this starts an i2c transfer
*/

-static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, struct i2c_msg msgs[], int num)
+static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, struct i2c_msg *msgs, int num)
{
unsigned long timeout;
int ret;
@@ -534,7 +534,7 @@
*/

static int s3c24xx_i2c_xfer(struct i2c_adapter *adap,
- struct i2c_msg msgs[], int num)
+ struct i2c_msg *msgs, int num)
{
struct s3c24xx_i2c *i2c = (struct s3c24xx_i2c *)adap->algo_data;
int retry;
--- ./drivers/i2c/busses/i2c-mpc.c.sav 2005-02-23 12:04:11.000000000 -0800
+++ ./drivers/i2c/busses/i2c-mpc.c 2005-02-23 12:17:28.000000000 -0800
@@ -233,7 +233,7 @@
return length;
}

-static int mpc_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
+static int mpc_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
{
struct i2c_msg *pmsg;
int i;
--- ./drivers/i2c/busses/i2c-ibm_iic.c.sav 2005-02-23 12:04:42.000000000 -0800
+++ ./drivers/i2c/busses/i2c-ibm_iic.c 2005-02-23 12:21:08.000000000 -0800
@@ -549,7 +549,7 @@
* Generic master transfer entrypoint.
* Returns the number of processed messages or error (<0)
*/
-static int iic_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
+static int iic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
{
struct ibm_iic_private* dev = (struct ibm_iic_private*)(i2c_get_adapdata(adap));
volatile struct iic_regs __iomem *iic = dev->vaddr;
--- ./drivers/i2c/busses/i2c-keywest.c.sav 2005-02-23 12:05:10.000000000 -0800
+++ ./drivers/i2c/busses/i2c-keywest.c 2005-02-23 12:26:47.000000000 -0800
@@ -399,7 +399,7 @@
*/
static int
keywest_xfer( struct i2c_adapter *adap,
- struct i2c_msg msgs[],
+ struct i2c_msg *msgs,
int num)
{
struct keywest_chan* chan = i2c_get_adapdata(adap);
--- ./drivers/i2c/busses/i2c-au1550.c.sav 2005-02-23 12:06:00.000000000 -0800
+++ ./drivers/i2c/busses/i2c-au1550.c 2005-02-23 12:27:39.000000000 -0800
@@ -253,7 +253,7 @@
}

static int
-au1550_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
+au1550_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
{
struct i2c_au1550_data *adap = i2c_adap->algo_data;
struct i2c_msg *p;
--- ./drivers/i2c/algos/i2c-algo-pca.c.sav 2005-02-23 12:06:21.000000000 -0800
+++ ./drivers/i2c/algos/i2c-algo-pca.c 2005-02-23 12:28:09.000000000 -0800
@@ -178,7 +178,7 @@
}

static int pca_xfer(struct i2c_adapter *i2c_adap,
- struct i2c_msg msgs[],
+ struct i2c_msg *msgs,
int num)
{
struct i2c_algo_pca_data *adap = i2c_adap->algo_data;
--- ./drivers/i2c/algos/i2c-algo-pcf.c.sav 2005-02-23 12:07:04.000000000 -0800
+++ ./drivers/i2c/algos/i2c-algo-pcf.c 2005-02-23 12:28:49.000000000 -0800
@@ -332,7 +332,7 @@
}

static int pcf_xfer(struct i2c_adapter *i2c_adap,
- struct i2c_msg msgs[],
+ struct i2c_msg *msgs,
int num)
{
struct i2c_algo_pcf_data *adap = i2c_adap->algo_data;
--- ./drivers/i2c/algos/i2c-algo-ite.c.sav 2005-02-23 12:07:17.000000000 -0800
+++ ./drivers/i2c/algos/i2c-algo-ite.c 2005-02-23 12:29:31.000000000 -0800
@@ -490,7 +490,7 @@
* condition.
*/
#if 0
-static int iic_combined_transaction(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
+static int iic_combined_transaction(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
{
int i;
struct i2c_msg *pmsg;
@@ -600,7 +600,7 @@
* verify that the bus is not busy or in some unknown state.
*/
static int iic_xfer(struct i2c_adapter *i2c_adap,
- struct i2c_msg msgs[],
+ struct i2c_msg *msgs,
int num)
{
struct i2c_algo_iic_data *adap = i2c_adap->algo_data;
--- ./drivers/i2c/algos/i2c-algo-sgi.c.sav 2005-02-23 12:07:40.000000000 -0800
+++ ./drivers/i2c/algos/i2c-algo-sgi.c 2005-02-23 12:29:58.000000000 -0800
@@ -131,7 +131,7 @@
return 0;
}

-static int sgi_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[],
+static int sgi_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs,
int num)
{
struct i2c_algo_sgi_data *adap = i2c_adap->algo_data;
--- ./drivers/media/video/saa7134/saa7134-i2c.c.sav 2005-02-23 12:08:12.000000000 -0800
+++ ./drivers/media/video/saa7134/saa7134-i2c.c 2005-02-23 12:30:20.000000000 -0800
@@ -236,7 +236,7 @@
}

static int saa7134_i2c_xfer(struct i2c_adapter *i2c_adap,
- struct i2c_msg msgs[], int num)
+ struct i2c_msg *msgs, int num)
{
struct saa7134_dev *dev = i2c_adap->algo_data;
enum i2c_status status;
--- ./drivers/media/video/bttv-i2c.c.sav 2005-02-23 12:08:29.000000000 -0800
+++ ./drivers/media/video/bttv-i2c.c 2005-02-23 12:30:56.000000000 -0800
@@ -245,7 +245,7 @@
return retval;
}

-static int bttv_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
+static int bttv_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
{
struct bttv *btv = i2c_get_adapdata(i2c_adap);
int retval = 0;
--- ./drivers/media/dvb/dibusb/dvb-dibusb-fe-i2c.c.sav 2005-02-23 12:09:43.000000000 -0800
+++ ./drivers/media/dvb/dibusb/dvb-dibusb-fe-i2c.c 2005-02-23 12:31:38.000000000 -0800
@@ -38,7 +38,7 @@
/*
* I2C master xfer function
*/
-static int dibusb_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
+static int dibusb_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg *msg,int num)
{
struct usb_dibusb *dib = i2c_get_adapdata(adap);
int i;
--- ./drivers/media/common/saa7146_i2c.c.sav 2005-02-23 12:10:06.000000000 -0800
+++ ./drivers/media/common/saa7146_i2c.c 2005-02-23 12:32:45.000000000 -0800
@@ -25,7 +25,7 @@
sent through the saa7146. have a look at the specifications p. 122 ff
to understand this. it returns the number of u32s to send, or -1
in case of an error. */
-static int saa7146_i2c_msg_prepare(const struct i2c_msg m[], int num, u32 *op)
+static int saa7146_i2c_msg_prepare(const struct i2c_msg *m, int num, u32 *op)
{
int h1, h2;
int i, j, addr;
@@ -89,7 +89,7 @@
which bytes were read through the adapter and write them back to the corresponding
i2c-message. but instead, we simply write back all bytes.
fixme: this could be improved. */
-static int saa7146_i2c_msg_cleanup(const struct i2c_msg m[], int num, u32 *op)
+static int saa7146_i2c_msg_cleanup(const struct i2c_msg *m, int num, u32 *op)
{
int i, j;
int op_count = 0;
@@ -272,7 +272,7 @@
return 0;
}

-int saa7146_i2c_transfer(struct saa7146_dev *dev, const struct i2c_msg msgs[], int num, int retries)
+int saa7146_i2c_transfer(struct saa7146_dev *dev, const struct i2c_msg *msgs, int num, int retries)
{
int i = 0, count = 0;
u32* buffer = dev->d_i2c.cpu_addr;
@@ -372,7 +372,7 @@
}

/* utility functions */
-static int saa7146_i2c_xfer(struct i2c_adapter* adapter, struct i2c_msg msg[], int num)
+static int saa7146_i2c_xfer(struct i2c_adapter* adapter, struct i2c_msg *msg, int num)
{
struct saa7146_dev* dev = i2c_get_adapdata(adapter);
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