linux-kernel - [PATCH 5.9 197/255] block: add a return value to set_capacity_revalidate_and

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Message-Id: <20201117122148.517812147@linuxfoundation.org>
Date:   Tue, 17 Nov 2020 14:05:37 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Petr Vorel <pvorel@...e.cz>, Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 5.9 197/255] block: add a return value to set_capacity_revalidate_and_notify

From: Christoph Hellwig <hch@....de>

commit 7e890c37c25c7cbca37ff0ab292873d8146e713b upstream.

Return if the function ended up sending an uevent or not.

Cc: stable@...r.kernel.org # v5.9
Signed-off-by: Christoph Hellwig <hch@....de>
Reviewed-by: Petr Vorel <pvorel@...e.cz>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 block/genhd.c         |    5 ++++-
 include/linux/genhd.h |    2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

--- a/block/genhd.c
+++ b/block/genhd.c
@@ -49,7 +49,7 @@ static void disk_release_events(struct g
  * Set disk capacity and notify if the size is not currently
  * zero and will not be set to zero
  */
-void set_capacity_revalidate_and_notify(struct gendisk *disk, sector_t size,
+bool set_capacity_revalidate_and_notify(struct gendisk *disk, sector_t size,
 					bool revalidate)
 {
 	sector_t capacity = get_capacity(disk);
@@ -63,7 +63,10 @@ void set_capacity_revalidate_and_notify(
 		char *envp[] = { "RESIZE=1", NULL };
 
 		kobject_uevent_env(&disk_to_dev(disk)->kobj, KOBJ_CHANGE, envp);
+		return true;
 	}
+
+	return false;
 }
 
 EXPORT_SYMBOL_GPL(set_capacity_revalidate_and_notify);
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -315,7 +315,7 @@ static inline int get_disk_ro(struct gen
 extern void disk_block_events(struct gendisk *disk);
 extern void disk_unblock_events(struct gendisk *disk);
 extern void disk_flush_events(struct gendisk *disk, unsigned int mask);
-extern void set_capacity_revalidate_and_notify(struct gendisk *disk,
+extern bool set_capacity_revalidate_and_notify(struct gendisk *disk,
 			sector_t size, bool revalidate);
 extern unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask);