kernel-hacking-2024-linux-s.../arch/powerpc
Anton Blanchard ce47c1c45b powerpc/eeh: Fix oops when probing in early boot
If we take an EEH error early enough, we oops:

Call Trace:
[c000000010483770] [c000000000013ee4] .show_stack+0xd8/0x218 (unreliable)
[c000000010483850] [c000000000658940] .dump_stack+0x28/0x3c
[c0000000104838d0] [c000000000057a68] .eeh_dn_check_failure+0x2b8/0x304
[c000000010483990] [c0000000000259c8] .rtas_read_config+0x120/0x168
[c000000010483a40] [c000000000025af4] .rtas_pci_read_config+0xe4/0x124
[c000000010483af0] [c00000000037af18] .pci_bus_read_config_word+0xac/0x104
[c000000010483bc0] [c0000000008fec98] .pcibios_allocate_resources+0x7c/0x220
[c000000010483c90] [c0000000008feed8] .pcibios_resource_survey+0x9c/0x418
[c000000010483d80] [c0000000008fea10] .pcibios_init+0xbc/0xf4
[c000000010483e20] [c000000000009844] .do_one_initcall+0x98/0x1d8
[c000000010483ed0] [c0000000008f0560] .kernel_init+0x228/0x2e8
[c000000010483f90] [c000000000031a08] .kernel_thread+0x54/0x70
EEH: Detected PCI bus error on device <null>
EEH: This PCI device has failed 1 times in the last hour:
EEH: location=U78A5.001.WIH8464-P1 driver= pci addr=0001:00:01.0
EEH: of node=/pci@800000020000209/usb@1
EEH: PCI device/vendor: 00351033
EEH: PCI cmd/status register: 12100146

Unable to handle kernel paging request for data at address 0x00000468
Oops: Kernel access of bad area, sig: 11 [#1]
....
NIP [c000000000057610] .rtas_set_slot_reset+0x38/0x10c
LR [c000000000058724] .eeh_reset_device+0x5c/0x124
Call Trace:
[c00000000bc6bd00] [c00000000005a0e0] .pcibios_remove_pci_devices+0x7c/0xb0 (unreliable)
[c00000000bc6bd90] [c000000000058724] .eeh_reset_device+0x5c/0x124
[c00000000bc6be40] [c0000000000589c0] .handle_eeh_events+0x1d4/0x39c
[c00000000bc6bf00] [c000000000059124] .eeh_event_handler+0xf0/0x188
[c00000000bc6bf90] [c000000000031a08] .kernel_thread+0x54/0x70

We called rtas_set_slot_reset while scanning the bus and before the pci_dn
to pcidev mapping has been created. Since we only need the pcidev to work
out the type of reset and that only gets set after the module for the
device loads, lets just do a hot reset if the pcidev is NULL.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Linas Vepstas <linasvepstas@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-05-21 17:31:09 +10:00
..
boot powerpc/83xx: Add MCU LEDs support for MPC837xRDB and MPC8315RDB boards 2010-05-17 10:55:32 -05:00
configs Merge commit 'origin/master' into next 2010-05-07 11:29:25 +10:00
include/asm Merge commit 'origin/master' into next 2010-05-07 11:29:25 +10:00
kernel powerpc/pci: Check devices status property when scanning OF tree 2010-05-21 17:31:09 +10:00
kvm KVM: fix the handling of dirty bitmaps to avoid overflows 2010-04-20 13:06:55 +03:00
lib powerpc: Fix string library functions 2010-05-21 17:31:08 +10:00
math-emu
mm powerpc/fsl-booke: Move loadcam_entry back to asm code to fix SMP ftrace 2010-05-17 10:56:20 -05:00
oprofile include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
platforms powerpc/eeh: Fix oops when probing in early boot 2010-05-21 17:31:09 +10:00
sysdev powerpc: Add interrupt support to mpc8xxx_gpio 2010-05-17 10:48:28 -05:00
xmon powerpc: Mark some variables in the page fault path __read_mostly 2010-02-03 17:39:48 +11:00
Kconfig powerpc: Add kprobe-based event tracer 2010-04-07 18:11:43 +10:00
Kconfig.debug powerpc/cpumask: Add DEBUG_PER_CPU_MAPS option 2010-05-06 18:05:26 +10:00
Makefile
relocs_check.pl