From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Date: Sun, 25 Sep 2016 08:40:34 +0200
1. Add a definition for the macros "MY_LOG_PREFIX" and "pr_fmt" so that
their information can be used for consistent message output.
2. Prefer usage of the macro "pr_info" over the interface "printk"
in this function.
3. Reduce number of output function calls.
Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
---
v2: Yesterday a software development discussion pointed weaknesses out around
the previous update steps "3" and "4".
Now I propose this update variant in the hope that my second approach
for this software module will work as desired and can be accepted
a bit easier.
Will the script "checkpatch.pl" need another improvement so that
the following information can be avoided for my use case anyhow?
ERROR: Macros with complex values should be enclosed in parentheses
drivers/input/joystick/joydump.c | 40 ++++++++++++++++++++++------------------
1 file changed, 22 insertions(+), 18 deletions(-)
diff --git a/drivers/input/joystick/joydump.c b/drivers/input/joystick/joydump.c
index f9f6cbe..e23c499 100644
--- a/drivers/input/joystick/joydump.c
+++ b/drivers/input/joystick/joydump.c
@@ -27,6 +27,8 @@
* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
*/
+#define MY_LOG_PREFIX KBUILD_MODNAME ": "
+#define pr_fmt(fmt) MY_LOG_PREFIX fmt
#include <linux/module.h>
#include <linux/gameport.h>
#include <linux/kernel.h>
@@ -55,27 +57,31 @@ static int joydump_connect(struct gameport *gameport, struct gameport_driver *dr
unsigned long flags;
unsigned char u;
- printk(KERN_INFO "joydump: ,------------------ START ----------------.\n");
- printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys);
- printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed);
+ pr_info(",------------------ START ----------------.\n"
+ MY_LOG_PREFIX "| Dumping: %30s |\n"
+ MY_LOG_PREFIX "| Speed: %28d kHz |\n",
+ gameport->phys,
+ gameport->speed);
if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
-
- printk(KERN_INFO "joydump: | Raw mode not available - trying cooked. |\n");
-
+ pr_info("| Raw mode not available - trying cooked. |\n");
if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
-
- printk(KERN_INFO "joydump: | Cooked not available either. Failing. |\n");
- printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
+ pr_info("| Cooked not available either. Failing. |\n"
+ MY_LOG_PREFIX
+ "`------------------- END -----------------'\n");
return -ENODEV;
}
gameport_cooked_read(gameport, axes, &buttons);
for (i = 0; i < 4; i++)
- printk(KERN_INFO "joydump: | Axis %d: %4d. |\n", i, axes[i]);
- printk(KERN_INFO "joydump: | Buttons %02x. |\n", buttons);
- printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
+ pr_info("| Axis %d: %4d. |\n",
+ i,
+ axes[i]);
+ pr_info("| Buttons %02x. |\n"
+ MY_LOG_PREFIX
+ "`------------------- END -----------------'\n",
+ buttons);
}
timeout = gameport_time(gameport, 10000); /* 10 ms */
@@ -119,16 +125,15 @@ static int joydump_connect(struct gameport *gameport, struct gameport_driver *dr
t = i;
dump = buf;
prev = dump;
-
- printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n");
- printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0);
+ pr_info(">------------------ DATA -----------------<\n"
+ MY_LOG_PREFIX "| index: %3d delta: %3d us data: ", 0, 0);
for (j = 7; j >= 0; j--)
printk("%d", (dump->data >> j) & 1);
printk(" |\n");
dump++;
for (i = 1; i < t; i++, dump++, prev++) {
- printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",
+ pr_info("| index: %3d delta: %3d us data: ",
i, dump->time - prev->time);
for (j = 7; j >= 0; j--)
printk("%d", (dump->data >> j) & 1);
@@ -137,8 +142,7 @@ static int joydump_connect(struct gameport *gameport, struct gameport_driver *dr
kfree(buf);
jd_end:
- printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
-
+ pr_info("`------------------- END -----------------'\n");
return 0;
}
--
2.10.0
--
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