Hi, This is what I get, if I remove mmc card while system is suspended: <4>[15241.041945] Call Trace: <4>[15241.042047] [<ffffffff8106620a>] ? prepare_to_wait+0x2a/0x90 <4>[15241.042159] [<ffffffff810790bd>] ? trace_hardirqs_on+0xd/0x10 <4>[15241.042271] [<ffffffff8140db12>] ? _raw_spin_unlock_irqrestore+0x42/0x80 <4>[15241.042386] [<ffffffff8112a390>] ? bdi_sched_wait+0x0/0x20 <4>[15241.042496] [<ffffffff8112a39e>] bdi_sched_wait+0xe/0x20 <4>[15241.042606] [<ffffffff8140af6f>] __wait_on_bit+0x5f/0x90 <4>[15241.042714] [<ffffffff8112a390>] ? bdi_sched_wait+0x0/0x20 <4>[15241.042824] [<ffffffff8140b018>] out_of_line_wait_on_bit+0x78/0x90 <4>[15241.042935] [<ffffffff81065fd0>] ? wake_bit_function+0x0/0x40 <4>[15241.043045] [<ffffffff8112a2d3>] ? bdi_queue_work+0xa3/0xe0 <4>[15241.043155] [<ffffffff8112a37f>] bdi_sync_writeback+0x6f/0x80 <4>[15241.043265] [<ffffffff8112a3d2>] sync_inodes_sb+0x22/0x120 <4>[15241.043375] [<ffffffff8112f1d2>] __sync_filesystem+0x82/0x90 <4>[15241.043485] [<ffffffff8112f3db>] sync_filesystem+0x4b/0x70 <4>[15241.043594] [<ffffffff811391de>] fsync_bdev+0x2e/0x60 <4>[15241.043704] [<ffffffff812226be>] invalidate_partition+0x2e/0x50 <4>[15241.043816] [<ffffffff8116b92f>] del_gendisk+0x3f/0x140 <4>[15241.043926] [<ffffffffa00c0233>] mmc_blk_remove+0x33/0x60 [mmc_block] <4>[15241.044043] [<ffffffff81338977>] mmc_bus_remove+0x17/0x20 <4>[15241.044152] [<ffffffff812ce746>] __device_release_driver+0x66/0xc0 <4>[15241.044264] [<ffffffff812ce89d>] device_release_driver+0x2d/0x40 <4>[15241.044375] [<ffffffff812cd9b5>] bus_remove_device+0xb5/0x120 <4>[15241.044486] [<ffffffff812cb46f>] device_del+0x12f/0x1a0 <4>[15241.044593] [<ffffffff81338a5b>] mmc_remove_card+0x5b/0x90 <4>[15241.044702] [<ffffffff8133ac27>] mmc_sd_remove+0x27/0x50 <4>[15241.044811] [<ffffffff81337d8c>] mmc_resume_host+0x10c/0x140 <4>[15241.044929] [<ffffffffa00850e9>] sdhci_resume_host+0x69/0xa0 [sdhci] <4>[15241.045044] [<ffffffffa0bdc39e>] sdhci_pci_resume+0x8e/0xb0 [sdhci_pci] <4>[15241.045159] [<ffffffff8124b0a2>] pci_legacy_resume+0x42/0x60 <4>[15241.045268] [<ffffffff8124b148>] pci_pm_restore+0x88/0xb0 <4>[15241.045378] [<ffffffff812d3942>] pm_op+0x1a2/0x1c0 <4>[15241.045483] [<ffffffff812d44cd>] dpm_resume_end+0x14d/0x520 <4>[15241.045593] [<ffffffff8108c0f1>] hibernation_snapshot+0xd1/0x290 <4>[15241.045704] [<ffffffff8108c3ad>] hibernate+0xfd/0x200 <4>[15241.045811] [<ffffffff8108ac5c>] state_store+0xec/0x100 <4>[15241.045919] [<ffffffff81172e17>] ? sysfs_get_active_two+0x27/0x60 <4>[15241.046032] [<ffffffff8122db07>] kobj_attr_store+0x17/0x20 <4>[15241.046141] [<ffffffff811710a6>] sysfs_write_file+0xe6/0x170 <4>[15241.046253] [<ffffffff811087f8>] vfs_write+0xb8/0x1a0 <4>[15241.046361] [<ffffffff811089d1>] sys_write+0x51/0x90 <4>[15241.046470] [<ffffffff8100305b>] system_call_fastpath+0x16/0x1b <4>[15241.046579] INFO: lockdep is turned off. It seems that del_disk can't be called from .resume methods. It sleeps for threads that are frozen at that point. Since I wrote my own driver (for xD cards) I have seen same problem. I solved this (it is just very nice that way anyway) by a freezable kernel thread that polls for card state changes, and thus calls del_disk (indirectly) after system got fully resumed. What do you think? Best regards, Maxim Levitsky _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
