Re: pci hotplug problem

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Why not use pciehp?

Thanks,
Kenji Kaneshige


(2011/06/09 14:31), shivprashant wrote:
> hi,
> i am writing pci express hotplug driver for mpc8315erdb(powerpc). the driver uses PCI hotplug subsystem not pcie port bus driver. i am able to do insertion and removal of pci express cards and confirm using 'lspci' command. driver is working with SATA and PATA memory cards with some minor modifications in the kernel. the problem i am facing now is when i try to repeatedly insert and remove the kernel is crashing, although non-fatal. normal insertion/removal works fine but repeated insertion/removal fails. pls guide me where am i wrong or what changes i should make to recover from pci errors.
> 
> Following is the crash log when repeatedly inserting and removing the PATA cards (i am using delkin 32GB cards),
> scsi20 : pata_jmicron
> scsi21 : pata_jmicron
> ata21: PATA max UDMA/100 cmd 0xff7fa010 ctl 0xff7fa020 bmdma 0xff7fa000 irq 21
> ata22: PATA max UDMA/100 cmd 0xff7fa018 ctl 0xff7fa024 bmdma 0xff7fa008 irq 21
> PCIE Card Removed from Slot 0
> Oops: Machine check, sig: 7 [#1]
> MPC831x RDB
> last sysfs file: /sys/devices/pci0002:02/0002:02:00.0/0002:03:00.0/class
> Modules linked in:
> NIP: c00124c4 LR: c00124b0 CTR: c0017998
> REGS: cfad3cb0 TRAP: 0200 Not tainted (2.6.36.1)
> MSR: 00049030 <EE,ME,IR,DR> CR: 22204084 XER: 20000000
> TASK = cfa9c030[1282] 'scsi_eh_20' THREAD: cfad2000
> GPR00: 00000000 cfad3d60 cfa9c030 00000000 cfad3d08 00e00000 a91e4fb9 00000001
> GPR08: c03fd688 fdef7000 fd6f7000 c042a0e0 00005a07 00020d78 c02fbd0c ffffffff
> GPR16: 00000000 00000000 00000000 00000004 c01ff498 00000001 cfac94c8 cfac8000
> GPR24: c01fa87c 00000003 ffff2a2d cfac801c 00000001 00000000 cfac9430 fd6f8012
> NIP [c00124c4] ioread8+0x2c/0x328
> LR [c00124b0] ioread8+0x18/0x328
> Call Trace:
> [cfad3d60] [c002bccc] msleep+0x1c/0x34 (unreliable)
> [cfad3d70] [c01fa77c] ata_sff_wait_after_reset+0x6c/0x16c
> [cfad3da0] [c01fa934] ata_sff_softreset+0xb8/0x204
> [cfad3de0] [c01f2604] ata_do_reset+0xa0/0xb4
> [cfad3e00] [c01f33ac] ata_eh_reset+0x3e4/0xcf4
> [cfad3e80] [c01f59e8] ata_eh_recover+0x284/0x10e0
> [cfad3f00] [c01f6a0c] ata_do_eh+0x4c/0xb0
> [cfad3f20] [c01f926c] ata_sff_error_handler+0x110/0x140
> [cfad3f40] [c01f7680] ata_scsi_error+0x2ec/0x4e0
> [cfad3f70] [c01d2664] scsi_error_handler+0xc4/0x39c
> [cfad3fb0] [c0039d4c] kthread+0x7c/0x80
> [cfad3ff0] [c000f200] kernel_thread+0x4c/0x68
> Instruction dump:
> 4e800020 9421fff0 7c0802a6 93e1000c 7c7f1b78 90010014 481835f5 2f830000
> 38600000 419e0018 7c0004ac 881f0000 <0c000000> 4c00012c 5403063e 80010014
> ---[ end trace fb9766f858e66ef2 ]---
> 
> 
> 


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