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Message-Id: <20070730192132.80415234.akalten@comcast.net> Date: Mon, 30 Jul 2007 19:21:32 -0400 From: "A. Kalten" <akalten@...cast.net> To: Gabriel C <nix.or.die@...glemail.com> Cc: Kernel development list <linux-kernel@...r.kernel.org>, USB development list <linux-usb-devel@...ts.sourceforge.net> Subject: Re: Can't unload uhci_hcd module with 2.6.22 -- also oops On Mon, 30 Jul 2007 18:09:23 -0400 (EDT) Alan Stern <stern@...land.harvard.edu> wrote: > On Mon, 30 Jul 2007, Gabriel C wrote: > > > A. Kalten wrote: > > [ added usb peoples to CC ] > > > Hello, > > > > > > To send a fax using an external usb modem, I do the following: > > > > > > modprobe uhci-hcd > > > modprobe cdc-acm > > > mount -t usbfs none /proc/bus/usb > > > > > > Then I send the fax. > > > > > > However, when I attempt to unload the modules by reversing > > > the above steps, then uhci_hcd module will not unload: > > > > > > [/]# rmmod uhci-hcd > > > ERROR: Removing 'uhci_hcd': Device or resource busy > > > > > > Using lsof to list all open files gives the following: > > > > > > ksuspend_ 766 root cwd DIR 8,1 456 2 / > > > ksuspend_ 766 root rtd DIR 8,1 456 2 / > > > ksuspend_ 766 root txt unknown /proc/766/exe > > > khubd 769 root cwd DIR 8,1 456 2 / > > > khubd 769 root rtd DIR 8,1 456 2 / > > > khubd 769 root txt unknown /proc/769/exe > > > > > > I cannot terminate these processes. > > You're not supposed to be able to terminate them. > > > > Also, the kernel log shows an oops: > > > > > > kernel: usbcore: deregistering interface driver cdc_acm > > > kernel: uhci_hcd 0000:00:1d.3: remove, state 1 > > > kernel: usb usb4: USB disconnect, address 1 > > > kernel: uhci_hcd 0000:00:1d.3: USB bus 4 deregistered > > > kernel: ACPI: PCI interrupt for device 0000:00:1d.3 disabled > > > kernel: uhci_hcd 0000:00:1d.2: remove, state 1 > > > kernel: usb usb3: USB disconnect, address 1 > > > kernel: uhci_hcd 0000:00:1d.2: USB bus 3 deregistered > > > kernel: ACPI: PCI interrupt for device 0000:00:1d.2 disabled > > > kernel: uhci_hcd 0000:00:1d.1: remove, state 1 > > > kernel: usb usb2: USB disconnect, address 1 > > > kernel: usb 2-2: USB disconnect, address 2 > > > kernel: Unable to handle kernel paging request at ffffffff88040440 RIP: > > > kernel: [sysfs_get_name+46/65] sysfs_get_name+0x2e/0x41 > > > kernel: PGD 203067 PUD 205063 PMD 7a6b2067 PTE 0 > > > kernel: Oops: 0000 [1] SMP > > > kernel: CPU 1 > > > kernel: Modules linked in: uhci_hcd usbcore af_packet skge bitrev crc32 > > > kernel: Pid: 1123, comm: rmmod Not tainted 2.6.22 #3 > > > kernel: RIP: 0010:[sysfs_get_name+46/65] [sysfs_get_name+46/65] sysfs_get_name+0x2e/0x41 > > > kernel: RSP: 0018:ffff81006edd5ce0 EFLAGS: 00010246 > > > kernel: RAX: ffffffff88040440 RBX: ffff81006fbb68e0 RCX: 0000000000000000 > > > kernel: RDX: 0000000000000004 RSI: ffffffff80423b38 RDI: ffff81006fbb6b88 > > > kernel: RBP: ffff81006fbb6b88 R08: 0000000000000000 R09: 8000000000000000 > > > kernel: R10: 0000000000000080 R11: ffffffff80330606 R12: ffff81006fbb6b90 > > > kernel: R13: ffff81006f414c78 R14: ffffffff80423b38 R15: ffffffff8803b940 > > > kernel: FS: 00002b93765b76f0(0000) GS:ffff810002f4d140(0000) knlGS:0000000000000000 > > > kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > > > kernel: CR2: ffffffff88040440 CR3: 000000006f5e5000 CR4: 00000000000006e0 > > > kernel: Process rmmod (pid: 1123, threadinfo ffff81006edd4000, task ffff81006e48ae40) > > > kernel: Stack: ffffffff8029b6dd ffff81006fbb0420 ffff81006fbb05a0 ffff8100784a9800 > > > kernel: ffff81006fbb0510 ffff8100784a9888 ffffffff80330986 ffff81006fbb0400 > > > kernel: ffff81006fbb0400 ffff81006fbb0420 ffffffff80330b95 ffff81006fbb0400 > > > kernel: Call Trace: > > > kernel: [sysfs_hash_and_remove+104/295] sysfs_hash_and_remove+0x68/0x127 > > > kernel: [device_remove_file+37/58] device_remove_file+0x25/0x3a > > > kernel: [device_del+375/704] device_del+0x177/0x2c0 > > > kernel: [_end+129064639/2131730856] :usbcore:usb_disable_device+0x8c/0x106 > > > kernel: [_end+129049073/2131730856] :usbcore:usb_disconnect+0x98/0xee > > > kernel: [_end+129049053/2131730856] :usbcore:usb_disconnect+0x84/0xee > > > kernel: [_end+129057037/2131730856] :usbcore:usb_remove_hcd+0x85/0xe1 > > > kernel: [_end+129097874/2131730856] :usbcore:usb_hcd_pci_remove+0x1d/0x89 > > > kernel: [pci_device_remove+36/77] pci_device_remove+0x24/0x4d > > > kernel: [__device_release_driver+130/184] __device_release_driver+0x82/0xb8 > > > kernel: [driver_detach+252/261] driver_detach+0xfc/0x105 > > > kernel: [bus_remove_driver+122/157] bus_remove_driver+0x7a/0x9d > > > kernel: [pci_unregister_driver+16/129] pci_unregister_driver+0x10/0x81 > > > kernel: [_end+129186684/2131730856] :uhci_hcd:uhci_hcd_cleanup+0x10/0x2c > > > kernel: [sys_delete_module+319/444] sys_delete_module+0x13f/0x1bc > > > kernel: [__up_write+29/318] __up_write+0x1d/0x13e > > > kernel: [system_call+126/131] system_call+0x7e/0x83 > > > kernel: > > > kernel: > > > kernel: Code: 48 8b 00 c3 83 fa 20 74 f7 31 c0 0f 1f 00 c3 0f 0b eb fe 41 > > > kernel: RIP [sysfs_get_name+46/65] sysfs_get_name+0x2e/0x41 > > > kernel: RSP <ffff81006edd5ce0> > > > kernel: CR2: ffffffff88040440 > > > > > > My system is Intel Pentium D dual core with Asus P5WD2 motherboard. > > Does this patch help? > > http://article.gmane.org/gmane.linux.kernel/556682/raw > > Alan Stern > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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