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 ]---
--
With Regards,
Shivaprashanth H
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