| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 20 Aug 2015 16:43:53 +0200
From: Jacek Anaszewski <j.anaszewski@...sung.com>
To: linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Andrew Lunn <andrew@...n.ch>, Nate Case <ncase@...-inc.com>,
Jacek Anaszewski <j.anaszewski@...sung.com>
Subject: [PATCH/RFC v6 23/36] leds: pca955x: Remove work queue
From: Andrew Lunn <andrew@...n.ch>
Now the core implements the work queue, remove it from the drivers,
and switch to using brightness_set_blocking op.
Signed-off-by: Andrew Lunn <andrew@...n.ch>
Cc: Nate Case <ncase@...-inc.com>
Signed-off-by: Jacek Anaszewski <j.anaszewski@...sung.com>
---
drivers/leds/leds-pca955x.c | 39 +++++++++------------------------------
1 file changed, 9 insertions(+), 30 deletions(-)
diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
index b775e1e..840401a 100644
--- a/drivers/leds/leds-pca955x.c
+++ b/drivers/leds/leds-pca955x.c
@@ -47,7 +47,6 @@
#include <linux/leds.h>
#include <linux/err.h>
#include <linux/i2c.h>
-#include <linux/workqueue.h>
#include <linux/slab.h>
/* LED select registers determine the source that drives LED outputs */
@@ -110,8 +109,6 @@ struct pca955x {
struct pca955x_led {
struct pca955x *pca955x;
- struct work_struct work;
- enum led_brightness brightness;
struct led_classdev led_cdev;
int led_num; /* 0 .. 15 potentially */
char name[32];
@@ -193,7 +190,8 @@ static u8 pca955x_read_ls(struct i2c_client *client, int n)
pca95xx_num_input_regs(pca955x->chipdef->bits) + 4 + n);
}
-static void pca955x_led_work(struct work_struct *work)
+static int pca955x_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
{
struct pca955x_led *pca955x_led;
struct pca955x *pca955x;
@@ -201,7 +199,7 @@ static void pca955x_led_work(struct work_struct *work)
int chip_ls; /* which LSx to use (0-3 potentially) */
int ls_led; /* which set of bits within LSx to use (0-3) */
- pca955x_led = container_of(work, struct pca955x_led, work);
+ pca955x_led = container_of(led_cdev, struct pca955x_led, led_cdev);
pca955x = pca955x_led->pca955x;
chip_ls = pca955x_led->led_num / 4;
@@ -211,7 +209,7 @@ static void pca955x_led_work(struct work_struct *work)
ls = pca955x_read_ls(pca955x->client, chip_ls);
- switch (pca955x_led->brightness) {
+ switch (value) {
case LED_FULL:
ls = pca955x_ledsel(ls, ls_led, PCA955X_LS_LED_ON);
break;
@@ -230,7 +228,7 @@ static void pca955x_led_work(struct work_struct *work)
* just turning off for all other values.
*/
pca955x_write_pwm(pca955x->client, 1,
- 255 - pca955x_led->brightness);
+ 255 - value);
ls = pca955x_ledsel(ls, ls_led, PCA955X_LS_BLINK1);
break;
}
@@ -238,21 +236,8 @@ static void pca955x_led_work(struct work_struct *work)
pca955x_write_ls(pca955x->client, chip_ls, ls);
mutex_unlock(&pca955x->lock);
-}
-
-static void pca955x_led_set(struct led_classdev *led_cdev, enum led_brightness value)
-{
- struct pca955x_led *pca955x;
-
- pca955x = container_of(led_cdev, struct pca955x_led, led_cdev);
-
- pca955x->brightness = value;
- /*
- * Must use workqueue for the actual I/O since I2C operations
- * can sleep.
- */
- schedule_work(&pca955x->work);
+ return 0;
}
static int pca955x_probe(struct i2c_client *client,
@@ -328,9 +313,7 @@ static int pca955x_probe(struct i2c_client *client,
}
pca955x_led->led_cdev.name = pca955x_led->name;
- pca955x_led->led_cdev.brightness_set = pca955x_led_set;
-
- INIT_WORK(&pca955x_led->work, pca955x_led_work);
+ pca955x_led->led_cdev.brightness_set_blocking = pca955x_led_set;
err = led_classdev_register(&client->dev,
&pca955x_led->led_cdev);
@@ -355,10 +338,8 @@ static int pca955x_probe(struct i2c_client *client,
return 0;
exit:
- while (i--) {
+ while (i--)
led_classdev_unregister(&pca955x->leds[i].led_cdev);
- cancel_work_sync(&pca955x->leds[i].work);
- }
return err;
}
@@ -368,10 +349,8 @@ static int pca955x_remove(struct i2c_client *client)
struct pca955x *pca955x = i2c_get_clientdata(client);
int i;
- for (i = 0; i < pca955x->chipdef->bits; i++) {
+ for (i = 0; i < pca955x->chipdef->bits; i++)
led_classdev_unregister(&pca955x->leds[i].led_cdev);
- cancel_work_sync(&pca955x->leds[i].work);
- }
return 0;
}
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists