Re: [PATCH v2 2/2] block: Fix WARN_ON in blk_mq_run_hw_queue when called from interrupt context

On Dec 23, 2025, at 04:15, Ionut Nechita (WindRiver) djiony2011@gmail.com wrote:

From: Ionut Nechita ionut.nechita@windriver.com

Fix warning "WARN_ON_ONCE(!async && in_interrupt())" that occurs during SCSI device scanning when blk_freeze_queue_start() calls blk_mq_run_hw_queues() synchronously from interrupt context.

The issue happens during device removal/scanning when:

1. blk_mq_destroy_queue() -> blk_queue_start_drain()
2. blk_freeze_queue_start() calls blk_mq_run_hw_queues(q, false)
3. This triggers the warning in blk_mq_run_hw_queue() when in interrupt context

Change the synchronous call to asynchronous to avoid running in interrupt context.

Fixes: Warning in blk_mq_run_hw_queue+0x1fa/0x260

You've added a wrong format of Fixes tag.

Thanks.

Signed-off-by: Ionut Nechita ionut.nechita@windriver.com