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| author | Damien Le Moal <damien.lemoal@wdc.com> | 2021-01-28 15:36:19 +0900 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-01-28 07:31:50 -0700 |
| commit | 0fe37724f8e70fa4cb72948f60fca553702df768 (patch) | |
| tree | 3094f7e80c8206dd1842188de08e9c25b459a1dc /block/partitions/core.c | |
| parent | 6c635caef410aa757befbd8857c1eadde5cc22ed (diff) | |
| download | lwn-0fe37724f8e70fa4cb72948f60fca553702df768.tar.gz lwn-0fe37724f8e70fa4cb72948f60fca553702df768.zip | |
block: fix bd_size_lock use
Some block device drivers, e.g. the skd driver, call set_capacity() with
IRQ disabled. This results in lockdep ito complain about inconsistent
lock states ("inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage")
because set_capacity takes a block device bd_size_lock using the
functions spin_lock() and spin_unlock(). Ensure a consistent locking
state by replacing these calls with spin_lock_irqsave() and
spin_lock_irqrestore(). The same applies to bdev_set_nr_sectors().
With this fix, all lockdep complaints are resolved.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/partitions/core.c')
| -rw-r--r-- | block/partitions/core.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/block/partitions/core.c b/block/partitions/core.c index 23460cee9de5..4601a845cd79 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -88,9 +88,11 @@ static int (*check_part[])(struct parsed_partitions *) = { static void bdev_set_nr_sectors(struct block_device *bdev, sector_t sectors) { - spin_lock(&bdev->bd_size_lock); + unsigned long flags; + + spin_lock_irqsave(&bdev->bd_size_lock, flags); i_size_write(bdev->bd_inode, (loff_t)sectors << SECTOR_SHIFT); - spin_unlock(&bdev->bd_size_lock); + spin_unlock_irqrestore(&bdev->bd_size_lock, flags); } static struct parsed_partitions *allocate_partitions(struct gendisk *hd) |