On Thu, Jan 28, 2021 at 03:36:19PM +0900, Damien Le Moal wrote:
> 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.
I'd much rather fix the driver to not call set_capacity with irqs
disabled..
