On Sun, 8 Jul 2007, Markus Rechberger wrote: > On 7/8/07, Christoph <[EMAIL PROTECTED]> wrote: > > Hallo Markus! > > > > I'm using a Pinnacle PCTV DVB-T for several months now without serious > > problems. > > So far I used it only with my Notebook. Now I set up a Mini-ITX Machine with > > MythTV running 24/24h. > > > > The machine freezes ~36h ... black screen, even no sysrq. (Debian etch > > 2.6.18-4-k7). > > So I setup kexec, kernel 2.6.21, v4l 5877:e9a7be188b2b and now I got a > > backtrace: > > > > <1>[16645.528000] BUG: unable to handle kernel NULL pointer dereference at > > virtual address 0 > > 0000068 > > [...] > > [16645.528000] EIP is at end_unlink_async+0x1b/0xc5 [ehci_hcd] > > [16645.528000] eax: 00000060 ebx: de4f20dc ecx: df912020 edx: df8f0b57 > > [16645.528000] esi: 00000000 edi: de4f20dc ebp: c58a9d4c esp: c58a9d40 > > [16645.528000] ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068 > > [16645.528000] Process mythbackend (pid: 12863, ti=c58a8000 task=dbb3d070 > > task.ti=c58a8000) > > [16645.528000] Stack: 00000020 00000000 de4f20dc c58a9dbc df8ed7d6 d74ba800 > > de4f20dc de4f20d > > c > > [16645.528000] dd9bd080 c58a9d78 df8ed22a de4f20dc 00000000 de4f20dc > > c58a9de8 df8ed7d > > 6 > > [16645.528000] 000000bc c58a9d9c 00000292 00000000 00000000 c56ce254 > > de4f20dc 0000000 > > 0 > > [16645.528000] Call Trace: > > [16645.528000] [<c0104a3e>] show_trace_log_lvl+0x1a/0x2f > > [16645.528000] [<c0104aee>] show_stack_log_lvl+0x9b/0xa3 > > [16645.528000] [<c0104cac>] show_registers+0x1b6/0x288 > > [16645.528000] [<c0104e68>] die+0xea/0x1bd > > [16645.528000] [<c0113bcf>] do_page_fault+0x435/0x506 > > [16645.528000] [<c0289cbc>] error_code+0x74/0x7c > > [16645.528000] [<df8ed7d6>] ehci_work+0x22/0x64b [ehci_hcd] > > [16645.528000] [<df8f21b5>] ehci_irq+0x234/0x254 [ehci_hcd] > > [16645.528000] [<df8a83af>] usb_hcd_irq+0x24/0x51 [usbcore] > > [16645.528000] [<c013b3e2>] handle_IRQ_event+0x21/0x48 > > [16645.528000] [<c013c515>] handle_level_irq+0x5f/0x96 > > [16645.528000] [<c0105f8a>] do_IRQ+0x5c/0x7a > > [16645.528000] [<c010453f>] common_interrupt+0x23/0x28 > > [16645.528000] [<c0140892>] free_hot_page+0xa/0xc > > [16645.528000] [<c01408ae>] __free_pages+0x1a/0x25 > > [16645.528000] [<c014c0bc>] __vunmap+0xa2/0xcb > > [16645.528000] [<c014c16f>] vfree+0x25/0x27 > > [16645.528000] [<dfb1e77b>] dvb_dvr_release+0x5b/0xb4 [dvb_core] > > [16645.528000] [<c0155973>] __fput+0xa9/0x153 > > [16645.528000] [<c0155a33>] fput+0x16/0x18 > > [16645.528000] [<c01535cf>] filp_close+0x54/0x5c > > [16645.528000] [<c0154597>] sys_close+0x57/0x8d > > [16645.528000] [<c0103b30>] sysenter_past_esp+0x5d/0x81 > > [16645.528000] ======================= > > [16645.528000] Code: e0 89 f8 e8 4c 4c 86 e0 83 c4 2c 5b 5e 5f c9 c3 55 89 > > e5 57 56 53 89 c3 > > 8b 70 14 0f ba b0 bc 00 00 00 01 8d 46 60 ba 57 0b 8f df <c6> 46 68 03 c7 > > 46 48 00 00 00 00 > > e8 21 8d 8c e0 8b 7e 58 80 63 > > [16645.528000] EIP: [<df8ed1da>] end_unlink_async+0x1b/0xc5 [ehci_hcd]
For whatever it's worth, the crash occurred in end_async_unlink because ehci->reclaim was NULL. This may imply that ehci->reclaim_ready was set when it shouldn't be. Don't ask me how either of these could have happened. Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
