From: Christoph Hellwig <hch@lst.de>
To: Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>
Cc: Guenter Roeck <linux@roeck-us.net>, linux-mtd@lists.infradead.org
Subject: [PATCH 2/8] mtd_blkdevs: use lockdep_assert_held
Date: Mon, 23 Aug 2021 09:33:53 +0200 [thread overview]
Message-ID: <20210823073359.705281-3-hch@lst.de> (raw)
In-Reply-To: <20210823073359.705281-1-hch@lst.de>
Use lockdep_assert_held to ensure mtd_table_mutex is held instead of
mutex_trylock games.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/mtd/mtd_blkdevs.c | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 6b81a1c9ccbe..81f0ce2a0b5a 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -310,10 +310,7 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new)
struct gendisk *gd;
int ret;
- if (mutex_trylock(&mtd_table_mutex)) {
- mutex_unlock(&mtd_table_mutex);
- BUG();
- }
+ lockdep_assert_held(&mtd_table_mutex);
mutex_lock(&blktrans_ref_mutex);
list_for_each_entry(d, &tr->devs, list) {
@@ -444,10 +441,7 @@ int del_mtd_blktrans_dev(struct mtd_blktrans_dev *old)
{
unsigned long flags;
- if (mutex_trylock(&mtd_table_mutex)) {
- mutex_unlock(&mtd_table_mutex);
- BUG();
- }
+ lockdep_assert_held(&mtd_table_mutex);
if (old->disk_attributes)
sysfs_remove_group(&disk_to_dev(old->disk)->kobj,
--
2.30.2
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next prev parent reply other threads:[~2021-08-23 7:37 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-23 7:33 mtd locking fix and cleanups Christoph Hellwig
2021-08-23 7:33 ` [PATCH 1/8] mtd_blkdevs: don't hold del_mtd_blktrans_dev in blktrans_{open, release} Christoph Hellwig
2021-08-23 8:33 ` Miquel Raynal
2021-08-23 7:33 ` Christoph Hellwig [this message]
2021-08-23 8:33 ` [PATCH 2/8] mtd_blkdevs: use lockdep_assert_held Miquel Raynal
2021-08-23 7:33 ` [PATCH 3/8] mtd/ftl: don't cast away the type when calling add_mtd_blktrans_dev Christoph Hellwig
2021-08-23 8:33 ` Miquel Raynal
2021-08-23 7:33 ` [PATCH 4/8] mtd/rfd_ftl: " Christoph Hellwig
2021-08-23 8:33 ` Miquel Raynal
2021-08-23 7:33 ` [PATCH 5/8] mtd_blkdevs: simplify blktrans_dev_get Christoph Hellwig
2021-08-23 8:33 ` Miquel Raynal
2021-08-23 7:33 ` [PATCH 6/8] mtd_blkdevs: remove blktrans_ref_mutex Christoph Hellwig
2021-08-23 8:33 ` Miquel Raynal
2021-08-23 7:33 ` [PATCH 7/8] mtd_blkdevs: simplify blktrans_getgeo Christoph Hellwig
2021-08-23 8:33 ` Miquel Raynal
2021-08-23 7:33 ` [PATCH 8/8] mtd_blkdevs: simplify the refcounting in blktrans_{open, release} Christoph Hellwig
2021-08-23 8:33 ` Miquel Raynal
2021-08-23 8:30 ` mtd locking fix and cleanups Miquel Raynal
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