Add additional modes to trigger the selected LED.
The following modes are supported:
Tx/Rx: Flash LED on data transmission (default)
CTS: DCE Ready to accept data from the DTE.
DSR: DCE is ready to receive and send data.
CAR: DCE is receiving a carrier from a remote DTE.
RNG: DCE has detected an incoming ring signal.
The mode can be changed for example with the following command:
echo "CTS" > /sys/class/leds/<led>/mode
This would turn on the LED, when the DTE(modem) signals the DCE that it
is ready to accept data.
Signed-off-by: Florian Eckert <[email protected]>
---
.../ABI/testing/sysfs-class-led-trigger-tty | 16 ++
drivers/leds/trigger/ledtrig-tty.c | 144 ++++++++++++++++--
2 files changed, 145 insertions(+), 15 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-class-led-trigger-tty b/Documentation/ABI/testing/sysfs-class-led-trigger-tty
index 2bf6b24e781b..31d62a5ae095 100644
--- a/Documentation/ABI/testing/sysfs-class-led-trigger-tty
+++ b/Documentation/ABI/testing/sysfs-class-led-trigger-tty
@@ -4,3 +4,19 @@ KernelVersion: 5.10
Contact: [email protected]
Description:
Specifies the tty device name of the triggering tty
+
+What: /sys/class/leds/<led>/mode
+Date: January 2023
+KernelVersion: 6.3
+Description:
+ Specifies the operating to trigger the LED.
+ The following operating modes are supported:
+ Tx/Rx: Flash LED on data transmission (default)
+ CTS: DCE Ready to accept data from the DTE.
+ LED on if line is high.
+ DSR: DCE is ready to receive and send data.
+ LED on if line is high.
+ CAR: DCE is receiving a carrier from a remote DTE.
+ LED on if line is high.
+ RNG: DCE has detected an incoming ring signal.
+ LED on if line is high.
diff --git a/drivers/leds/trigger/ledtrig-tty.c b/drivers/leds/trigger/ledtrig-tty.c
index f62db7e520b5..8b2eed7e67e5 100644
--- a/drivers/leds/trigger/ledtrig-tty.c
+++ b/drivers/leds/trigger/ledtrig-tty.c
@@ -7,6 +7,14 @@
#include <linux/tty.h>
#include <uapi/linux/serial.h>
+enum tty_led_mode {
+ TTY_LED_CNT,
+ TTY_LED_CTS,
+ TTY_LED_DSR,
+ TTY_LED_CAR,
+ TTY_LED_LAST = TTY_LED_RNG
+};
+
struct ledtrig_tty_data {
struct led_classdev *led_cdev;
struct delayed_work dwork;
@@ -14,6 +22,15 @@ struct ledtrig_tty_data {
const char *ttyname;
struct tty_struct *tty;
int rx, tx;
+ enum tty_led_mode mode;
+};
+
+static const char * const mode[] = {
+ [TTY_LED_CNT] = "Tx/Rx", // Trasmit Data / Receive Data
+ [TTY_LED_CTS] = "CTS", // CTS Clear To Send
+ [TTY_LED_DSR] = "DSR", // DSR Data Set Ready
+ [TTY_LED_CAR] = "CAR", // CAR Data Carrier Detect (DCD)
+ [TTY_LED_RNG] = "RNG", // RNG Ring Indicator (RI)
};
static void ledtrig_tty_restart(struct ledtrig_tty_data *trigger_data)
@@ -21,6 +38,70 @@ static void ledtrig_tty_restart(struct ledtrig_tty_data *trigger_data)
schedule_delayed_work(&trigger_data->dwork, 0);
}
+static ssize_t ledtrig_tty_mode_show(char *buf, enum tty_led_mode tty_mode)
+{
+ int len = 0;
+ int i;
+
+ for (i = 0; i <= TTY_LED_LAST; i++) {
+ bool hit = tty_mode == i;
+ bool last = i == __TTY_LED_LAST;
+
+ len += sysfs_emit_at(buf, len, "%s%s%s",
+ hit ? "[" : "",
+ mode[i],
+ hit ? "]" : "",
+ last ? "" : " ");
+ }
+
+ len += sysfs_emit_at(buf, len, "\n");
+
+ return len;
+}
+
+static ssize_t tty_led_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
+ enum tty_led_mode tty_mode;
+
+ mutex_lock(&trigger_data->mutex);
+ tty_mode = trigger_data->mode;
+ mutex_unlock(&trigger_data->mutex);
+
+ return ledtrig_tty_mode_show(buf, tty_mode);
+}
+
+static ssize_t tty_led_mode_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t size)
+{
+ struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
+ ssize_t ret = size;
+ enum tty_led_mode tty_mode = __TTY_LED_MAX;
+ int i;
+
+ /* Check for new line in string*/
+ if (size > 0 && buf[size - 1] == '\n')
+ size -= 1;
+
+ for (i = 0; i <= __TTY_LED_LAST; i++)
+ if (strncmp(buf, mode[i], size) == 0)
+ tty_mode = i;
+ break;
+ }
+
+ if (tty_mode > __TTY_LED_LAST)
+ return -EINVAL;
+
+ mutex_lock(&trigger_data->mutex);
+ trigger_data->mode = tty_mode;
+ mutex_unlock(&trigger_data->mutex);
+
+ return ret;
+}
+static DEVICE_ATTR_RW(tty_led_mode);
+
static ssize_t ttyname_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -76,6 +157,18 @@ static ssize_t ttyname_store(struct device *dev,
}
static DEVICE_ATTR_RW(ttyname);
+static void ledtrig_tty_flags(struct ledtrig_tty_data *trigger_data,
+ unsigned int flag)
+{
+ unsigned int status;
+
+ status = tty_get_mget(trigger_data->tty);
+ if (status & flag)
+ led_set_brightness_sync(trigger_data->led_cdev, LED_ON);
+ else
+ led_set_brightness_sync(trigger_data->led_cdev, LED_OFF);
+}
+
static void ledtrig_tty_work(struct work_struct *work)
{
struct ledtrig_tty_data *trigger_data =
@@ -113,21 +206,38 @@ static void ledtrig_tty_work(struct work_struct *work)
trigger_data->tty = tty;
}
- ret = tty_get_icount(trigger_data->tty, &icount);
- if (ret) {
- dev_info(trigger_data->tty->dev, "Failed to get icount, stopped polling\n");
- mutex_unlock(&trigger_data->mutex);
- return;
- }
-
- if (icount.rx != trigger_data->rx ||
- icount.tx != trigger_data->tx) {
- led_set_brightness_sync(trigger_data->led_cdev, LED_ON);
-
- trigger_data->rx = icount.rx;
- trigger_data->tx = icount.tx;
- } else {
- led_set_brightness_sync(trigger_data->led_cdev, LED_OFF);
+ switch (trigger_data->mode) {
+ case TTY_LED_CTS:
+ ledtrig_tty_flags(trigger_data, TIOCM_CTS);
+ break;
+ case TTY_LED_DSR:
+ ledtrig_tty_flags(trigger_data, TIOCM_DSR);
+ break;
+ case TTY_LED_CAR:
+ ledtrig_tty_flags(trigger_data, TIOCM_CAR);
+ break;
+ case TTY_LED_RNG:
+ ledtrig_tty_flags(trigger_data, TIOCM_RNG);
+ break;
+ case TTY_LED_CNT:
+ default:
+ ret = tty_get_icount(trigger_data->tty, &icount);
+ if (ret) {
+ dev_info(trigger_data->tty->dev, "Failed to get icount, stopped polling\n");
+ mutex_unlock(&trigger_data->mutex);
+ return;
+ }
+
+ if (icount.rx != trigger_data->rx ||
+ icount.tx != trigger_data->tx) {
+ led_set_brightness_sync(trigger_data->led_cdev, LED_ON);
+
+ trigger_data->rx = icount.rx;
+ trigger_data->tx = icount.tx;
+ } else {
+ led_set_brightness_sync(trigger_data->led_cdev, LED_OFF);
+ }
+ break;
}
out:
@@ -137,6 +247,7 @@ static void ledtrig_tty_work(struct work_struct *work)
static struct attribute *ledtrig_tty_attrs[] = {
&dev_attr_ttyname.attr,
+ &dev_attr_tty_led_mode.attr,
NULL
};
ATTRIBUTE_GROUPS(ledtrig_tty);
@@ -149,6 +260,9 @@ static int ledtrig_tty_activate(struct led_classdev *led_cdev)
if (!trigger_data)
return -ENOMEM;
+ /* set default mode */
+ trigger_data->mode = TTY_LED_CNT;
+
led_set_trigger_data(led_cdev, trigger_data);
INIT_DELAYED_WORK(&trigger_data->dwork, ledtrig_tty_work);
--
2.30.2
Hi Florian,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on tty/tty-testing]
[also build test WARNING on tty/tty-next tty/tty-linus pavel-leds/for-next staging/staging-testing staging/staging-next staging/staging-linus linus/master v6.2 next-20230220]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Florian-Eckert/tty-new-helper-function-tty_get_mget/20230220-232129
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
patch link: https://lore.kernel.org/r/20230220152038.3877596-3-fe%40dev.tdt.de
patch subject: [PATCH v4 2/2] trigger: ledtrig-tty: add additional modes
config: ia64-allyesconfig (https://download.01.org/0day-ci/archive/20230221/[email protected]/config)
compiler: ia64-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/8da3a8a2edcad2e4b36fce551cac1961a5cd90a6
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Florian-Eckert/tty-new-helper-function-tty_get_mget/20230220-232129
git checkout 8da3a8a2edcad2e4b36fce551cac1961a5cd90a6
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/leds/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <[email protected]>
| Link: https://lore.kernel.org/oe-kbuild-all/[email protected]/
All warnings (new ones prefixed by >>):
drivers/leds/trigger/ledtrig-tty.c:15:24: error: 'TTY_LED_RNG' undeclared here (not in a function); did you mean 'TTY_LED_CNT'?
15 | TTY_LED_LAST = TTY_LED_RNG
| ^~~~~~~~~~~
| TTY_LED_CNT
drivers/leds/trigger/ledtrig-tty.c:33:10: error: array index in initializer not of integer type
33 | [TTY_LED_RNG] = "RNG", // RNG Ring Indicator (RI)
| ^~~~~~~~~~~
drivers/leds/trigger/ledtrig-tty.c:33:10: note: (near initialization for 'mode')
drivers/leds/trigger/ledtrig-tty.c: In function 'ledtrig_tty_mode_show':
drivers/leds/trigger/ledtrig-tty.c:48:34: error: '__TTY_LED_LAST' undeclared (first use in this function); did you mean 'TTY_LED_LAST'?
48 | bool last = i == __TTY_LED_LAST;
| ^~~~~~~~~~~~~~
| TTY_LED_LAST
drivers/leds/trigger/ledtrig-tty.c:48:34: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/leds/trigger/ledtrig-tty.c:50:48: warning: too many arguments for format [-Wformat-extra-args]
50 | len += sysfs_emit_at(buf, len, "%s%s%s",
| ^~~~~~~~
drivers/leds/trigger/ledtrig-tty.c: In function 'tty_led_mode_store':
drivers/leds/trigger/ledtrig-tty.c:81:38: error: '__TTY_LED_MAX' undeclared (first use in this function); did you mean 'TTY_LED_CAR'?
81 | enum tty_led_mode tty_mode = __TTY_LED_MAX;
| ^~~~~~~~~~~~~
| TTY_LED_CAR
drivers/leds/trigger/ledtrig-tty.c:88:26: error: '__TTY_LED_LAST' undeclared (first use in this function); did you mean 'TTY_LED_LAST'?
88 | for (i = 0; i <= __TTY_LED_LAST; i++)
| ^~~~~~~~~~~~~~
| TTY_LED_LAST
>> drivers/leds/trigger/ledtrig-tty.c:89:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
89 | if (strncmp(buf, mode[i], size) == 0)
| ^~
drivers/leds/trigger/ledtrig-tty.c:91:25: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
91 | break;
| ^~~~~
drivers/leds/trigger/ledtrig-tty.c:91:25: error: break statement not within loop or switch
>> drivers/leds/trigger/ledtrig-tty.c:81:27: warning: variable 'tty_mode' set but not used [-Wunused-but-set-variable]
81 | enum tty_led_mode tty_mode = __TTY_LED_MAX;
| ^~~~~~~~
drivers/leds/trigger/ledtrig-tty.c:80:17: warning: unused variable 'ret' [-Wunused-variable]
80 | ssize_t ret = size;
| ^~~
drivers/leds/trigger/ledtrig-tty.c:79:34: warning: unused variable 'trigger_data' [-Wunused-variable]
79 | struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
| ^~~~~~~~~~~~
drivers/leds/trigger/ledtrig-tty.c:92:17: error: no return statement in function returning non-void [-Werror=return-type]
92 | }
| ^
drivers/leds/trigger/ledtrig-tty.c: At top level:
drivers/leds/trigger/ledtrig-tty.c:94:9: error: expected identifier or '(' before 'if'
94 | if (tty_mode > __TTY_LED_LAST)
| ^~
drivers/leds/trigger/ledtrig-tty.c:97:20: error: expected declaration specifiers or '...' before '&' token
97 | mutex_lock(&trigger_data->mutex);
| ^
drivers/leds/trigger/ledtrig-tty.c:98:21: error: expected '=', ',', ';', 'asm' or '__attribute__' before '->' token
98 | trigger_data->mode = tty_mode;
| ^~
drivers/leds/trigger/ledtrig-tty.c:99:22: error: expected declaration specifiers or '...' before '&' token
99 | mutex_unlock(&trigger_data->mutex);
| ^
drivers/leds/trigger/ledtrig-tty.c:101:9: error: expected identifier or '(' before 'return'
101 | return ret;
| ^~~~~~
drivers/leds/trigger/ledtrig-tty.c:102:1: error: expected identifier or '(' before '}' token
102 | }
| ^
cc1: some warnings being treated as errors
vim +50 drivers/leds/trigger/ledtrig-tty.c
40
41 static ssize_t ledtrig_tty_mode_show(char *buf, enum tty_led_mode tty_mode)
42 {
43 int len = 0;
44 int i;
45
46 for (i = 0; i <= TTY_LED_LAST; i++) {
47 bool hit = tty_mode == i;
48 bool last = i == __TTY_LED_LAST;
49
> 50 len += sysfs_emit_at(buf, len, "%s%s%s",
51 hit ? "[" : "",
52 mode[i],
53 hit ? "]" : "",
54 last ? "" : " ");
55 }
56
57 len += sysfs_emit_at(buf, len, "\n");
58
59 return len;
60 }
61
62 static ssize_t tty_led_mode_show(struct device *dev,
63 struct device_attribute *attr, char *buf)
64 {
65 struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
66 enum tty_led_mode tty_mode;
67
68 mutex_lock(&trigger_data->mutex);
69 tty_mode = trigger_data->mode;
70 mutex_unlock(&trigger_data->mutex);
71
72 return ledtrig_tty_mode_show(buf, tty_mode);
73 }
74
75 static ssize_t tty_led_mode_store(struct device *dev,
76 struct device_attribute *attr, const char *buf,
77 size_t size)
78 {
79 struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
80 ssize_t ret = size;
> 81 enum tty_led_mode tty_mode = __TTY_LED_MAX;
82 int i;
83
84 /* Check for new line in string*/
85 if (size > 0 && buf[size - 1] == '\n')
86 size -= 1;
87
88 for (i = 0; i <= __TTY_LED_LAST; i++)
> 89 if (strncmp(buf, mode[i], size) == 0)
90 tty_mode = i;
91 break;
92 }
93
94 if (tty_mode > __TTY_LED_LAST)
95 return -EINVAL;
96
97 mutex_lock(&trigger_data->mutex);
98 trigger_data->mode = tty_mode;
99 mutex_unlock(&trigger_data->mutex);
100
101 return ret;
102 }
103 static DEVICE_ATTR_RW(tty_led_mode);
104
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
Hi Florian,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on tty/tty-testing]
[also build test WARNING on tty/tty-next tty/tty-linus pavel-leds/for-next staging/staging-testing staging/staging-next staging/staging-linus linus/master v6.2]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Florian-Eckert/tty-new-helper-function-tty_get_mget/20230220-232129
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
patch link: https://lore.kernel.org/r/20230220152038.3877596-3-fe%40dev.tdt.de
patch subject: [PATCH v4 2/2] trigger: ledtrig-tty: add additional modes
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230221/[email protected]/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel-lab-lkp/linux/commit/8da3a8a2edcad2e4b36fce551cac1961a5cd90a6
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Florian-Eckert/tty-new-helper-function-tty_get_mget/20230220-232129
git checkout 8da3a8a2edcad2e4b36fce551cac1961a5cd90a6
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 olddefconfig
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/leds/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <[email protected]>
| Link: https://lore.kernel.org/oe-kbuild-all/[email protected]/
All warnings (new ones prefixed by >>):
drivers/leds/trigger/ledtrig-tty.c:15:24: error: 'TTY_LED_RNG' undeclared here (not in a function); did you mean 'TTY_LED_CNT'?
15 | TTY_LED_LAST = TTY_LED_RNG
| ^~~~~~~~~~~
| TTY_LED_CNT
drivers/leds/trigger/ledtrig-tty.c:33:10: error: array index in initializer not of integer type
33 | [TTY_LED_RNG] = "RNG", // RNG Ring Indicator (RI)
| ^~~~~~~~~~~
drivers/leds/trigger/ledtrig-tty.c:33:10: note: (near initialization for 'mode')
drivers/leds/trigger/ledtrig-tty.c: In function 'ledtrig_tty_mode_show':
drivers/leds/trigger/ledtrig-tty.c:48:34: error: '__TTY_LED_LAST' undeclared (first use in this function); did you mean 'TTY_LED_LAST'?
48 | bool last = i == __TTY_LED_LAST;
| ^~~~~~~~~~~~~~
| TTY_LED_LAST
drivers/leds/trigger/ledtrig-tty.c:48:34: note: each undeclared identifier is reported only once for each function it appears in
drivers/leds/trigger/ledtrig-tty.c:50:48: warning: too many arguments for format [-Wformat-extra-args]
50 | len += sysfs_emit_at(buf, len, "%s%s%s",
| ^~~~~~~~
drivers/leds/trigger/ledtrig-tty.c: In function 'tty_led_mode_store':
drivers/leds/trigger/ledtrig-tty.c:81:38: error: '__TTY_LED_MAX' undeclared (first use in this function); did you mean 'TTY_LED_CAR'?
81 | enum tty_led_mode tty_mode = __TTY_LED_MAX;
| ^~~~~~~~~~~~~
| TTY_LED_CAR
drivers/leds/trigger/ledtrig-tty.c:88:26: error: '__TTY_LED_LAST' undeclared (first use in this function); did you mean 'TTY_LED_LAST'?
88 | for (i = 0; i <= __TTY_LED_LAST; i++)
| ^~~~~~~~~~~~~~
| TTY_LED_LAST
drivers/leds/trigger/ledtrig-tty.c:89:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
89 | if (strncmp(buf, mode[i], size) == 0)
| ^~
drivers/leds/trigger/ledtrig-tty.c:91:25: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
91 | break;
| ^~~~~
drivers/leds/trigger/ledtrig-tty.c:91:25: error: break statement not within loop or switch
drivers/leds/trigger/ledtrig-tty.c:81:27: warning: variable 'tty_mode' set but not used [-Wunused-but-set-variable]
81 | enum tty_led_mode tty_mode = __TTY_LED_MAX;
| ^~~~~~~~
>> drivers/leds/trigger/ledtrig-tty.c:80:17: warning: unused variable 'ret' [-Wunused-variable]
80 | ssize_t ret = size;
| ^~~
>> drivers/leds/trigger/ledtrig-tty.c:79:34: warning: unused variable 'trigger_data' [-Wunused-variable]
79 | struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
| ^~~~~~~~~~~~
drivers/leds/trigger/ledtrig-tty.c:92:17: error: no return statement in function returning non-void [-Werror=return-type]
92 | }
| ^
drivers/leds/trigger/ledtrig-tty.c: At top level:
drivers/leds/trigger/ledtrig-tty.c:94:9: error: expected identifier or '(' before 'if'
94 | if (tty_mode > __TTY_LED_LAST)
| ^~
In file included from include/linux/rhashtable-types.h:14,
from include/linux/ipc.h:7,
from include/uapi/linux/sem.h:5,
from include/linux/sem.h:5,
from include/linux/sched.h:15,
from include/linux/delay.h:23,
from drivers/leds/trigger/ledtrig-tty.c:3:
drivers/leds/trigger/ledtrig-tty.c:97:20: error: expected declaration specifiers or '...' before '&' token
97 | mutex_lock(&trigger_data->mutex);
| ^
include/linux/mutex.h:187:44: note: in definition of macro 'mutex_lock'
187 | #define mutex_lock(lock) mutex_lock_nested(lock, 0)
| ^~~~
include/linux/mutex.h:187:50: error: expected declaration specifiers or '...' before numeric constant
187 | #define mutex_lock(lock) mutex_lock_nested(lock, 0)
| ^
drivers/leds/trigger/ledtrig-tty.c:97:9: note: in expansion of macro 'mutex_lock'
97 | mutex_lock(&trigger_data->mutex);
| ^~~~~~~~~~
drivers/leds/trigger/ledtrig-tty.c:98:21: error: expected '=', ',', ';', 'asm' or '__attribute__' before '->' token
98 | trigger_data->mode = tty_mode;
| ^~
drivers/leds/trigger/ledtrig-tty.c:99:22: error: expected declaration specifiers or '...' before '&' token
99 | mutex_unlock(&trigger_data->mutex);
| ^
drivers/leds/trigger/ledtrig-tty.c:101:9: error: expected identifier or '(' before 'return'
101 | return ret;
| ^~~~~~
drivers/leds/trigger/ledtrig-tty.c:102:1: error: expected identifier or '(' before '}' token
102 | }
| ^
cc1: some warnings being treated as errors
vim +/ret +80 drivers/leds/trigger/ledtrig-tty.c
74
75 static ssize_t tty_led_mode_store(struct device *dev,
76 struct device_attribute *attr, const char *buf,
77 size_t size)
78 {
> 79 struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
> 80 ssize_t ret = size;
81 enum tty_led_mode tty_mode = __TTY_LED_MAX;
82 int i;
83
84 /* Check for new line in string*/
85 if (size > 0 && buf[size - 1] == '\n')
86 size -= 1;
87
88 for (i = 0; i <= __TTY_LED_LAST; i++)
89 if (strncmp(buf, mode[i], size) == 0)
90 tty_mode = i;
> 91 break;
92 }
93
94 if (tty_mode > __TTY_LED_LAST)
95 return -EINVAL;
96
97 mutex_lock(&trigger_data->mutex);
98 trigger_data->mode = tty_mode;
99 mutex_unlock(&trigger_data->mutex);
100
101 return ret;
102 }
103 static DEVICE_ATTR_RW(tty_led_mode);
104
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests