From f3c737de8f57b5ce756010c2175f7d574194b30d Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Thu, 23 Apr 2009 08:37:58 +0200 Subject: [PATCH] umem: fix request_queue lock warning The umem driver issues two warnings on boot, due to blk_plug_device() and blk_remove_plug() being called without q->queue_lock held. Starting with e48ec690 (block: extend queue_flag bitops), the queue_flag_* functions warn if q->queue_lock doesn't appear to be locked. In fact, q->queue_lock is NULL (though that apparently isn't otherwise a problem as the driver is using card->lock for everything). Although blk_init_queue() with take a request_fn_proc and spinlock_t*, there isn't a corresponding init helper that takes a make_request_fn. Setting queue_lock to &card->lock explicitly seems to work fine for me. The warning goes away and the device appears to behave. [ 1.531881] v2.3 : Micro Memory(tm) PCI memory board block driver [ 1.538136] umem 0000:02:01.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20 [ 1.545018] umem 0000:02:01.0: Micro Memory(tm) controller found (PCI Mem Module (Battery Backup)) [ 1.554176] umem 0000:02:01.0: CSR 0xfc9ffc00 -> 0xffffc200013d0c00 (0x100) [ 1.561279] umem 0000:02:01.0: Size 1048576 KB, Battery 1 Disabled (FAILURE), Battery 2 Disabled (FAILURE) [ 1.571114] umem 0000:02:01.0: Window size 16777216 bytes, IRQ 20 [ 1.577304] umem 0000:02:01.0: memory NOT initialized. Consider over-writing whole device. [ 1.585989] umema:<4>------------[ cut here ]------------ [ 1.591775] WARNING: at include/linux/blkdev.h:492 blk_plug_device+0x6d/0x106() [ 1.592025] Hardware name: H8SSL [ 1.592025] Modules linked in: [ 1.592025] Pid: 1, comm: swapper Not tainted 2.6.29 #8 [ 1.592025] Call Trace: [ 1.592025] [] warn_slowpath+0xd3/0xf2 [ 1.592025] [] ? save_trace+0x3f/0x9b [ 1.592025] [] ? add_lock_to_list+0x7a/0xba [ 1.592025] [] ? validate_chain+0xb3b/0xce8 [ 1.592025] [] ? mm_make_request+0x27/0x59 [ 1.592025] [] ? mm_make_request+0x27/0x59 [ 1.592025] [] ? __lock_acquire+0x74e/0x7b9 [ 1.592025] [] ? get_lock_stats+0x34/0x5e [ 1.592025] [] ? put_lock_stats+0xe/0x27 [ 1.592025] [] ? mm_make_request+0x27/0x59 [ 1.592025] [] blk_plug_device+0x6d/0x106 [ 1.592025] [] mm_make_request+0x46/0x59 [ 1.592025] [] generic_make_request+0x335/0x3cf [ 1.592025] [] ? mempool_alloc_slab+0x11/0x13 [ 1.592025] [] ? mempool_alloc+0x45/0x101 [ 1.592025] [] ? put_lock_stats+0xe/0x27 [ 1.592025] [] submit_bio+0x10a/0x119 [ 1.592025] [] submit_bh+0xe5/0x109 [ 1.592025] [] block_read_full_page+0x2aa/0x2cb [ 1.592025] [] ? blkdev_get_block+0x0/0x4c [ 1.592025] [] ? _spin_unlock_irq+0x36/0x51 [ 1.592025] [] ? __lru_cache_add+0x92/0xb2 [ 1.592025] [] blkdev_readpage+0x13/0x15 [ 1.592025] [] read_cache_page_async+0x90/0x134 [ 1.592025] [] ? blkdev_readpage+0x0/0x15 [ 1.592025] [] ? adfspart_check_ICS+0x0/0x16c [ 1.592025] [] read_cache_page+0xe/0x45 [ 1.592025] [] read_dev_sector+0x2e/0x93 [ 1.592025] [] adfspart_check_ICS+0x28/0x16c [ 1.592025] [] ? trace_hardirqs_on+0xd/0xf [ 1.592025] [] ? adfspart_check_ICS+0x0/0x16c [ 1.592025] [] rescan_partitions+0x168/0x2fb [ 1.592025] [] __blkdev_get+0x259/0x336 [ 1.592025] [] ? kobject_put+0x47/0x4b [ 1.592025] [] blkdev_get+0xb/0xd [ 1.592025] [] register_disk+0xc4/0x12b [ 1.592025] [] add_disk+0xc3/0x12d [ 1.592025] [] ? mm_init+0x0/0x1a5 [ 1.592025] [] mm_init+0x129/0x1a5 [ 1.592025] [] ? mm_init+0x0/0x1a5 [ 1.592025] [] _stext+0x56/0x130 [ 1.592025] [] ? register_irq_proc+0xae/0xca [ 1.592025] [] ? proc_pid_lookup+0xb4/0x18b [ 1.592025] [] kernel_init+0x132/0x18b [ 1.592025] [] child_rip+0xa/0x20 [ 1.592025] [] ? restore_args+0x0/0x30 [ 1.592025] [] ? kernel_init+0x0/0x18b [ 1.592025] [] ? child_rip+0x0/0x20 [ 1.592025] ---[ end trace 7150b3b86da74e1e ]--- [ 1.889858] ------------[ cut here ]------------[ve_plug+0x5f/0x91() [ 1.893848] Hardware name: H8SSL [ 1.893848] Modules linked in: [ 1.893848] Pid: 1, comm: swapper Tainted: G W 2.6.29 #8 [ 1.893848] Call Trace: [ 1.893848] [] warn_slowpath+0xd3/0xf2 [ 1.893848] [] ? trace_hardirqs_on_thunk+0x3a/0x3f [ 1.893848] [] ? restore_args+0x0/0x30 [ 1.893848] [] ? __atomic_notifier_call_chain+0x0/0xb2 [ 1.893848] [] ? _spin_unlock_irq+0x31/0x51 [ 1.893848] [] ? _spin_unlock_irq+0x4d/0x51 [ 1.893848] [] ? mm_make_request+0x4e/0x59 [ 1.893848] [] ? get_lock_stats+0x34/0x5e [ 1.893848] [] ? put_lock_stats+0x25/0x27 [ 1.893848] [] ? mm_unplug_device+0x25/0x50 [ 1.893848] [] blk_remove_plug+0x5f/0x91 [ 1.893848] [] mm_unplug_device+0x30/0x50 [ 1.893848] [] blk_unplug+0x78/0x7d [ 1.893848] [] blk_backing_dev_unplug+0xd/0xf [ 1.893848] [] block_sync_page+0x4a/0x4c [ 1.893848] [] sync_page+0x44/0x4d [ 1.893848] [] __wait_on_bit_lock+0x42/0x8a [ 1.893848] [] ? sync_page+0x0/0x4d [ 1.893848] [] __lock_page+0x64/0x6b [ 1.893848] [] ? wake_bit_function+0x0/0x2a [ 1.893848] [] read_cache_page_async+0xd4/0x134 [ 1.893848] [] ? blkdev_readpage+0x0/0x15 [ 1.893848] [] ? adfspart_check_ICS+0x0/0x16c [ 1.893848] [] read_cache_page+0xe/0x45 [ 1.893848] [] read_dev_sector+0x2e/0x93 [ 1.893848] [] adfspart_check_ICS+0x28/0x16c [ 1.893848] [] ? trace_hardirqs_on+0xd/0xf [ 1.893848] [] ? adfspart_check_ICS+0x0/0x16c [ 1.893848] [] rescan_partitions+0x168/0x2fb [ 1.893848] [] __blkdev_get+0x259/0x336 [ 1.893848] [] ? kobject_put+0x47/0x4b [ 1.893848] [] blkdev_get+0xb/0xd [ 1.893848] [] register_disk+0xc4/0x12b [ 1.893848] [] add_disk+0xc3/0x12d [ 1.893848] [] ? mm_init+0x0/0x1a5 [ 1.893848] [] mm_init+0x129/0x1a5 [ 1.893848] [] ? mm_init+0x0/0x1a5 [ 1.893848] [] _stext+0x56/0x130 [ 1.893848] [] ? register_irq_proc+0xae/0xca [ 1.893848] [] ? proc_pid_lookup+0xb4/0x18b [ 1.893848] [] kernel_init+0x132/0x18b [ 1.893848] [] child_rip+0xa/0x20 [ 1.893848] [] ? restore_args+0x0/0x30 [ 1.893848] [] ? kernel_init+0x0/0x18b [ 1.893848] [] ? child_rip+0x0/0x20 [ 1.893848] ---[ end trace 7150b3b86da74e1f ]--- Signed-off-by: Sage Weil Signed-off-by: Jens Axboe --- drivers/block/umem.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/block/umem.c b/drivers/block/umem.c index 9744d59a69f2..858c34dd032d 100644 --- a/drivers/block/umem.c +++ b/drivers/block/umem.c @@ -906,6 +906,7 @@ static int __devinit mm_pci_probe(struct pci_dev *dev, goto failed_alloc; blk_queue_make_request(card->queue, mm_make_request); + card->queue->queue_lock = &card->lock; card->queue->queuedata = card; card->queue->unplug_fn = mm_unplug_device; -- 2.30.2