On Sat, 2010-02-13 at 15:29 +0200, Maxim Levitsky wrote: > I noticed that currently calling del_gendisk leads to sure deadlock if > attemped from .suspend or .resume functions. > > Something like that: > > [<ffffffff8106620a>] ? prepare_to_wait+0x2a/0x90 > [<ffffffff810790bd>] ? trace_hardirqs_on+0xd/0x10 > [<ffffffff8140db12>] ? _raw_spin_unlock_irqrestore+0x42/0x80 > [<ffffffff8112a390>] ? bdi_sched_wait+0x0/0x20 > [<ffffffff8112a39e>] bdi_sched_wait+0xe/0x20 > [<ffffffff8140af6f>] __wait_on_bit+0x5f/0x90 > [<ffffffff8112a390>] ? bdi_sched_wait+0x0/0x20 > [<ffffffff8140b018>] out_of_line_wait_on_bit+0x78/0x90 > [<ffffffff81065fd0>] ? wake_bit_function+0x0/0x40 > [<ffffffff8112a2d3>] ? bdi_queue_work+0xa3/0xe0 > [<ffffffff8112a37f>] bdi_sync_writeback+0x6f/0x80 > [<ffffffff8112a3d2>] sync_inodes_sb+0x22/0x120 > [<ffffffff8112f1d2>] __sync_filesystem+0x82/0x90 > [<ffffffff8112f3db>] sync_filesystem+0x4b/0x70 > [<ffffffff811391de>] fsync_bdev+0x2e/0x60 > [<ffffffff812226be>] invalidate_partition+0x2e/0x50 > [<ffffffff8116b92f>] del_gendisk+0x3f/0x140 > [<ffffffffa00c0233>] mmc_blk_remove+0x33/0x60 [mmc_block] > [<ffffffff81338977>] mmc_bus_remove+0x17/0x20 > [<ffffffff812ce746>] __device_release_driver+0x66/0xc0 > [<ffffffff812ce89d>] device_release_driver+0x2d/0x40 > [<ffffffff812cd9b5>] bus_remove_device+0xb5/0x120 > [<ffffffff812cb46f>] device_del+0x12f/0x1a0 > [<ffffffff81338a5b>] mmc_remove_card+0x5b/0x90 > [<ffffffff8133ac27>] mmc_sd_remove+0x27/0x50 > [<ffffffff81337d8c>] mmc_resume_host+0x10c/0x140 > [<ffffffffa00850e9>] sdhci_resume_host+0x69/0xa0 [sdhci] > [<ffffffffa0bdc39e>] sdhci_pci_resume+0x8e/0xb0 [sdhci_pci] > > bdi_queue_work seems to be the problem. > > Some device drivers need to remove their cards logically in .suspend, > because the card is removable, and can be changed while system is > suspended. > > Best regards, > Maxim Levitsky > Any update? Best regards, Maxim Levitsky _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
