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Message-ID: <20250907114557.15453-1-chiru.cezar.89@gmail.com>
Date: Sun, 7 Sep 2025 14:45:57 +0300
From: Cezar Chiru <chiru.cezar.89@...il.com>
To: andi.shyti@...nel.org
Cc: linux-i2c@...r.kernel.org,
linux-kernel@...r.kernel.org,
Cezar Chiru <chiru.cezar.89@...il.com>
Subject: [PATCH] i2c : algos : i2c-algo-pcf.c : fixed errors shown by checkpatch
Fixed all 18 errors revealed using checkpatch.pl on i2c-algo-pcf.c
file. Errors fixed were: macros starting with 'if' should be
enclosed by do - while loop to avoid possible if/else logic defects,
do not use assignment in if condition, spaces required around '=' ,
';', '<' and ','.
Motivation is to fix all errors and warnings i2c-algo-pcf kerenel
module.
Testing:
* built kernel with my changes and I2C_ALGOPCF=m enabled
and it built successfully.
* installed kernel and external modules generated by build
* rebooted and loaded using modprobe i2c-algo-pcf kernel module
with param i2c_debug=3 and no message was found related to
module in dmesg. But also no error was generated.
Errors on patch: on running checkpatch.pl on this patch 4 warnings
were raised. Will be fixed on following warnings fixes patch.
Signed-off-by: Cezar Chiru <chiru.cezar.89@...il.com>
---
drivers/i2c/algos/i2c-algo-pcf.c | 50 +++++++++++++++++++++-----------
1 file changed, 33 insertions(+), 17 deletions(-)
diff --git a/drivers/i2c/algos/i2c-algo-pcf.c b/drivers/i2c/algos/i2c-algo-pcf.c
index fd563e845d4b..18ba21ff8992 100644
--- a/drivers/i2c/algos/i2c-algo-pcf.c
+++ b/drivers/i2c/algos/i2c-algo-pcf.c
@@ -23,9 +23,18 @@
#include "i2c-algo-pcf.h"
-#define DEB2(x) if (i2c_debug >= 2) x
-#define DEB3(x) if (i2c_debug >= 3) x /* print several statistical values */
-#define DEBPROTO(x) if (i2c_debug >= 9) x;
+#define DEB2(x) do { \
+ if (i2c_debug >= 2) \
+ x; \
+ } while (0)
+#define DEB3(x) do { \
+ if (i2c_debug >= 3) \
+ x; \ /* print several statistical values */
+ } while (0)
+#define DEBPROTO(x) do { \
+ if (i2c_debug >= 9) \
+ x; \
+ } while (0)
/* debug the protocol by showing transferred bits */
#define DEF_TIMEOUT 16
@@ -160,7 +169,8 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap)
* check to see S1 now used as R/W ctrl -
* PCF8584 does that when ESO is zero
*/
- if (((temp = get_pcf(adap, 1)) & 0x7f) != (0)) {
+ temp = get_pcf(adap, 1);
+ if ((temp & 0x7f) != (0)) {
DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't select S0 (0x%02x).\n", temp));
return -ENXIO; /* definitely not PCF8584 */
}
@@ -168,7 +178,8 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap)
/* load own address in S0, effective address is (own << 1) */
i2c_outb(adap, get_own(adap));
/* check it's really written */
- if ((temp = i2c_inb(adap)) != get_own(adap)) {
+ temp = i2c_inb(adap);
+ if (temp != get_own(adap)) {
DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't set S0 (0x%02x).\n", temp));
return -ENXIO;
}
@@ -176,7 +187,8 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap)
/* S1=0xA0, next byte in S2 */
set_pcf(adap, 1, I2C_PCF_PIN | I2C_PCF_ES1);
/* check to see S2 now selected */
- if (((temp = get_pcf(adap, 1)) & 0x7f) != I2C_PCF_ES1) {
+ temp = get_pcf(adap, 1);
+ if ((temp & 0x7f) != I2C_PCF_ES1) {
DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't select S2 (0x%02x).\n", temp));
return -ENXIO;
}
@@ -184,7 +196,8 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap)
/* load clock register S2 */
i2c_outb(adap, get_clock(adap));
/* check it's really written, the only 5 lowest bits does matter */
- if (((temp = i2c_inb(adap)) & 0x1f) != get_clock(adap)) {
+ temp = i2c_inb(adap);
+ if ((temp & 0x1f) != get_clock(adap)) {
DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't set S2 (0x%02x).\n", temp));
return -ENXIO;
}
@@ -193,7 +206,8 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap)
set_pcf(adap, 1, I2C_PCF_IDLE);
/* check to see PCF is really idled and we can access status register */
- if ((temp = get_pcf(adap, 1)) != (I2C_PCF_PIN | I2C_PCF_BB)) {
+ temp = get_pcf(adap, 1);
+ if (temp != (I2C_PCF_PIN | I2C_PCF_BB)) {
DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't select S1` (0x%02x).\n", temp));
return -ENXIO;
}
@@ -209,7 +223,7 @@ static int pcf_sendbytes(struct i2c_adapter *i2c_adap, const char *buf,
struct i2c_algo_pcf_data *adap = i2c_adap->algo_data;
int wrcount, status, timeout;
- for (wrcount=0; wrcount<count; ++wrcount) {
+ for (wrcount = 0; wrcount < count; ++wrcount) {
DEB2(dev_dbg(&i2c_adap->dev, "i2c_write: writing %2.2X\n",
buf[wrcount] & 0xff));
i2c_outb(adap, buf[wrcount]);
@@ -246,7 +260,8 @@ static int pcf_readbytes(struct i2c_adapter *i2c_adap, char *buf,
/* increment number of bytes to read by one -- read dummy byte */
for (i = 0; i <= count; i++) {
- if ((wfp = wait_for_pin(adap, &status))) {
+ wfp = wait_for_pin(adap, &status);
+ if (wfp) {
if (wfp == -EINTR)
return -EINTR; /* arbitration lost */
@@ -299,7 +314,7 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap,
struct i2c_algo_pcf_data *adap = i2c_adap->algo_data;
struct i2c_msg *pmsg;
int i;
- int ret=0, timeout, status;
+ int ret = 0, timeout, status;
if (adap->xfer_begin)
adap->xfer_begin(adap->data);
@@ -313,7 +328,7 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap,
goto out;
}
- for (i = 0;ret >= 0 && i < num; i++) {
+ for (i = 0; ret >= 0 && i < num; i++) {
pmsg = &msgs[i];
DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: Doing %s %d bytes to 0x%02x - %d of %d messages\n",
@@ -358,9 +373,9 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap,
if (ret != pmsg->len) {
DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: fail: "
- "only read %d bytes.\n",ret));
+ "only read %d bytes.\n", ret));
} else {
- DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: read %d bytes.\n",ret));
+ DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: read %d bytes.\n", ret));
}
} else {
ret = pcf_sendbytes(i2c_adap, pmsg->buf, pmsg->len,
@@ -368,9 +383,9 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap,
if (ret != pmsg->len) {
DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: fail: "
- "only wrote %d bytes.\n",ret));
+ "only wrote %d bytes.\n", ret));
} else {
- DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: wrote %d bytes.\n",ret));
+ DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: wrote %d bytes.\n", ret));
}
}
}
@@ -406,7 +421,8 @@ int i2c_pcf_add_bus(struct i2c_adapter *adap)
/* register new adapter to i2c module... */
adap->algo = &pcf_algo;
- if ((rval = pcf_init_8584(pcf_adap)))
+ rval = pcf_init_8584(pcf_adap);
+ if (rval)
return rval;
rval = i2c_add_adapter(adap);
--
2.43.0
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