On Tue, 18 Oct 2005, Jeff Stevens wrote: > I am having an issue using a USB root filesystem. I > have tried both an NEC uPD720101 and a Phillips > ISP1563 host controller plugged into the PCI bus. > Both systems I am trying this on are PowerPC; one is a > Freescale MPC8540, and the other is an AMCC 440SP. > The filesystem resides on an M-Systems uDiskOnChip > module. The kernel I am running is 2.6.13 and I am > using the rootdelay=10 option. > > > Everything works fine on the MPC8540 system: ... > However, on the 440SP system it works sometimes and > not others. Right now, I might get it to work about > every 10 reboots. When it doesn't work, I see the > following: > > Waiting 10sec before mounting root device... > > Vendor: M-Sys Model: uDiskOnChip Rev: 5.02 > > Type: Direct-Access ANSI SCSI > revision: 00 > Oops: kernel access of bad area, sig: 11 [#1] > > NIP: C00FFAB0 LR: C00FB1C0 SP: C0781EE0 REGS: c0781e30 > TRAP: 0300 Not tainted > MSR: 00029000 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 00 > > DAR: 00000034, DSISR: 00800000 > > TASK = c072e770[2] 'ksoftirqd/0' THREAD: c0780000 > > Last syscall: -1 > > GPR00: 0000FFFE C0781EE0 C072E770 DFDD5060 DFE39DCC > 00000000 DFE46264 00000000 > GPR08: 00000000 DF843C00 00000002 DFE46200 000000A9 > 00000000 00000000 00000000 > GPR16: 00000000 00000000 00000000 00000003 00000003 > 52180000 FFFFFFFD 00000000 > GPR24: 00000000 C0240000 C0240000 0000000A DFDEA000 > DF843C00 00000000 C00FFA8C > NIP [c00ffab0] scsi_wait_done+0x24/0x78 > > LR [c00fb1c0] scsi_finish_command+0x84/0xb0
Please post more of the system log, showing what happened before the crash. > I am having another issue on this system that has to > do with mapping pci memory to user space (seems to be > a remap_pfn_range or mmap issue). Could this issue be > related? It seems unlikely. Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by: Power Architecture Resource Center: Free content, downloads, discussions, and more. http://solutions.newsforge.com/ibmarch.tmpl _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
