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From: Ian Pilcher <arequipeno@gmail.com>
To: linux-block@vger.kernel.org, linux-leds@vger.kernel.org
Cc: axboe@kernel.dk, pavel@ucw.cz, kabel@kernel.org,
	linux-kernel@vger.kernel.org, kernelnewbies@kernelnewbies.org
Subject: [RFC PATCH v3 09/18] ledtrig-blkdev: Add function to disassociate a device from all LEDs
Date: Wed, 18 Aug 2021 21:50:44 -0500	[thread overview]
Message-ID: <20210819025053.222710-10-arequipeno@gmail.com> (raw)
In-Reply-To: <20210819025053.222710-1-arequipeno@gmail.com>

Called when block device is being removed

Signed-off-by: Ian Pilcher <arequipeno@gmail.com>
---
 drivers/leds/trigger/ledtrig-blkdev.c | 31 +++++++++++++++++++++++++++
 include/linux/leds.h                  |  4 ++++
 2 files changed, 35 insertions(+)

diff --git a/drivers/leds/trigger/ledtrig-blkdev.c b/drivers/leds/trigger/ledtrig-blkdev.c
index 447fc81ae0c5..2072cc904616 100644
--- a/drivers/leds/trigger/ledtrig-blkdev.c
+++ b/drivers/leds/trigger/ledtrig-blkdev.c
@@ -281,3 +281,34 @@ static void blkdev_disk_delete(struct ledtrig_blkdev_led *const led,
 exit_unlock:
 	mutex_unlock(&ledtrig_blkdev_mutex);
 }
+
+
+/*
+ *
+ *	Disassociate all LEDs from a block device (because it's going away)
+ *
+ */
+
+/**
+ * ledtrig_blkdev_disk_cleanup - remove a block device from the blkdev LED
+ * trigger
+ * @disk:	the disk to be removed
+ */
+void ledtrig_blkdev_disk_cleanup(struct gendisk *const gd)
+{
+	struct ledtrig_blkdev_link *link;
+	struct hlist_node *next;
+
+	mutex_lock(&ledtrig_blkdev_mutex);
+
+	if (gd->ledtrig != NULL) {
+
+		hlist_for_each_entry_safe(link, next,
+					  &gd->ledtrig->leds, disk_leds_node) {
+			blkdev_disk_del_locked(link->led, link, gd->ledtrig);
+		}
+	}
+
+	mutex_unlock(&ledtrig_blkdev_mutex);
+}
+EXPORT_SYMBOL_GPL(ledtrig_blkdev_disk_cleanup);
diff --git a/include/linux/leds.h b/include/linux/leds.h
index 6b67650d8797..98c479814988 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -609,10 +609,14 @@ static inline void ledtrig_blkdev_disk_init(struct gendisk *const gd)
 {
 	gd->ledtrig = NULL;
 }
+void ledtrig_blkdev_disk_cleanup(struct gendisk *const gd);
 #else	/* CONFIG_LEDS_TRIGGER_BLKDEV */
 static inline void ledtrig_blkdev_disk_init(const struct gendisk *gd)
 {
 }
+static inline void ledtrig_blkdev_disk_cleanup(const struct gendisk *gd)
+{
+}
 #endif	/* CONFIG_LEDS_TRIGGER_BLKDEV */
 
 #endif		/* __LINUX_LEDS_H_INCLUDED */
-- 
2.31.1


  parent reply	other threads:[~2021-08-19  2:51 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-19  2:50 [RFC PATCH v3 00/18] Add block device LED trigger Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 01/18] docs: Add block device (blkdev) LED trigger documentation Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 02/18] block: Add get_disk_by_name() for use by blkdev LED trigger Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 03/18] ledtrig-blkdev: Add file (ledtrig-blkdev.c) for block device " Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 04/18] ledtrig-blkdev: Add misc. helper functions to blkdev " Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 05/18] ledtrig-blkdev: Periodically check devices for activity & blink LEDs Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 06/18] block: Add LED trigger pointer to struct gendisk Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 07/18] ledtrig-blkdev: Add function to initialize gendisk ledtrig member Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 08/18] ledtrig-blkdev: Add function to remove LED/device association Ian Pilcher
2021-08-19  2:50 ` Ian Pilcher [this message]
2021-08-19  2:50 ` [RFC PATCH v3 10/18] block: Call LED trigger init/cleanup functions Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 11/18] ledtrig-blkdev: Add function to associate a device with an LED Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 12/18] ledtrig-blkdev: Add sysfs attributes to [dis]associate LEDs & devices Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 13/18] ledtrig-blkdev: Add blink_time & interval sysfs attributes Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 14/18] ledtrig-blkdev: Add mode (read/write/rw) sysfs attributue Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 15/18] ledtrig-blkdev: Add function to associate blkdev trigger with LED Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 16/18] ledtrig-blkdev: Add function to disassociate an LED from the trigger Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 17/18] ledtrig-blkdev: Add initialization function Ian Pilcher
2021-08-19  2:50 ` [RFC PATCH v3 18/18] ledtrig-blkdev: Add config option to enable the trigger Ian Pilcher

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