------------[ cut here ]------------ WARNING: at lib/dma-debug.c:800 check_unmap+0x9c/0x67f() firewire_ohci 0000:05:00.0: DMA-API: device driver tries to free an invalid DMA memory address Modules linked in: firewire_ohci(+) firewire_core crc_itu_t radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core Pid: 202, comm: modprobe Not tainted 3.0.0-3.fc16.i686.PAE #1 Call Trace: [] warn_slowpath_common+0x7c/0x91 [] ? check_unmap+0x9c/0x67f [] ? check_unmap+0x9c/0x67f [] warn_slowpath_fmt+0x33/0x35 [] check_unmap+0x9c/0x67f [] ? trace_hardirqs_on_thunk+0xc/0x10 [] ? trace_hardirqs_off_thunk+0xc/0x10 [] ? restore_all+0xf/0xf [] ? rt_mutex_setprio+0xb2/0xf6 [] ? arch_local_irq_restore+0x5/0xb [] debug_dma_free_coherent+0x5c/0x64 [] dma_free_coherent+0x6a/0x8f [firewire_ohci] [] ohci_enable+0x3c2/0x439 [firewire_ohci] [] fw_card_add+0x45/0x71 [firewire_core] [] pci_probe+0x377/0x4a1 [firewire_ohci] [] ? _raw_spin_unlock_irqrestore+0x44/0x48 [] pci_device_probe+0x62/0xab [] driver_probe_device+0x129/0x208 [] ? mutex_lock_nested+0x43/0x49 [] __driver_attach+0x4f/0x6b [] bus_for_each_dev+0x42/0x6b [] driver_attach+0x1f/0x23 [] ? driver_probe_device+0x208/0x208 [] bus_add_driver+0xcd/0x214 [] driver_register+0x84/0xe3 [] ? __raw_spin_lock_init+0x2d/0x4e [] __pci_register_driver+0x4f/0xab [] ? 0xf7a38fff [] ? 0xf7a38fff [] fw_ohci_init+0x17/0x1000 [firewire_ohci] [] do_one_initcall+0x8c/0x146 [] ? set_memory_nx+0x38/0x3a [] ? 0xf7a38fff [] ? 0xf7a38fff [] sys_init_module+0x14b9/0x16dd [] sysenter_do_call+0x12/0x38 ---[ end trace 50b7d6497bc6b1f4 ]---