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linux-stable/arch/powerpc/platforms
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Vasant Hegde 52862ab33c powerpc/powernv/prd: Unregister OPAL_MSG_PRD2 notifier during module unload 
Commit 587164cd, introduced new opal message type (OPAL_MSG_PRD2) and
added opal notifier. But I missed to unregister the notifier during
module unload path. This results in below call trace if you try to
unload and load opal_prd module.

Also add new notifier_block for OPAL_MSG_PRD2 message.

Sample calltrace (modprobe -r opal_prd; modprobe opal_prd)
  BUG: Unable to handle kernel data access on read at 0xc0080000192200e0
  Faulting instruction address: 0xc00000000018d1cc
  Oops: Kernel access of bad area, sig: 11 [#1]
  LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV
  CPU: 66 PID: 7446 Comm: modprobe Kdump: loaded Tainted: G            E     5.14.0prd #759
  NIP:  c00000000018d1cc LR: c00000000018d2a8 CTR: c0000000000cde10
  REGS: c0000003c4c0f0a0 TRAP: 0300   Tainted: G            E      (5.14.0prd)
  MSR:  9000000002009033 <SF,HV,VEC,EE,ME,IR,DR,RI,LE>  CR: 24224824  XER: 20040000
  CFAR: c00000000018d2a4 DAR: c0080000192200e0 DSISR: 40000000 IRQMASK: 1
  ...
  NIP notifier_chain_register+0x2c/0xc0
  LR  atomic_notifier_chain_register+0x48/0x80
  Call Trace:
    0xc000000002090610 (unreliable)
    atomic_notifier_chain_register+0x58/0x80
    opal_message_notifier_register+0x7c/0x1e0
    opal_prd_probe+0x84/0x150 [opal_prd]
    platform_probe+0x78/0x130
    really_probe+0x110/0x5d0
    __driver_probe_device+0x17c/0x230
    driver_probe_device+0x60/0x130
    __driver_attach+0xfc/0x220
    bus_for_each_dev+0xa8/0x130
    driver_attach+0x34/0x50
    bus_add_driver+0x1b0/0x300
    driver_register+0x98/0x1a0
    __platform_driver_register+0x38/0x50
    opal_prd_driver_init+0x34/0x50 [opal_prd]
    do_one_initcall+0x60/0x2d0
    do_init_module+0x7c/0x320
    load_module+0x3394/0x3650
    __do_sys_finit_module+0xd4/0x160
    system_call_exception+0x140/0x290
    system_call_common+0xf4/0x258

Fixes: 587164cd59 ("powerpc/powernv: Add new opal message type")
Cc: stable@vger.kernel.org # v5.4+
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211028165716.41300-1-hegdevasant@linux.vnet.ibm.com
2021-10-29 16:47:32 +11:00
..
4xx powerpc: Add esr as a synonym for pt_regs.dsisr 2021-08-26 21:21:06 +10:00
8xx powerpc: bad_page_fault get registers from regs 2021-02-09 00:02:09 +11:00
40x powerpc: Remove IBM405 Erratum #77 2020-05-28 23:24:36 +10:00
44x powerpc/44x/fsp2: add missing of_node_put 2021-10-28 22:29:35 +11:00
52xx powerpc: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:41 +01:00
82xx powerpc: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:41 +01:00
83xx powerpc/83xx/mpc8349emitx: Make mcu_gpiochip_remove() return void 2021-10-28 00:41:29 +11:00
85xx powerpc/85xx: fix timebase sync issue when CONFIG_HOTPLUG_CPU=n 2021-10-09 00:15:58 +11:00
86xx powerpc: retire sbc8641d board support 2021-08-27 00:48:18 +10:00
512x powerpc: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:41 +01:00
amigaone powerpc/amigaone: Make amigaone_discover_phbs() static 2021-02-11 23:28:51 +11:00
book3s powerpc/vas: Fix potential NULL pointer dereference 2021-10-22 15:22:04 +11:00
cell powerpc: rename powerpc_debugfs_root to arch_debugfs_dir 2021-08-13 22:04:26 +10:00
chrp powerpc/chrp: Make hydra_init() static 2021-03-24 14:09:29 +11:00
embedded6xx powerpc: Refactor verification of MSR_RI 2021-08-26 21:21:07 +10:00
maple powerpc/pci: fix warning comparing pointer to 0 2021-03-29 13:22:13 +11:00
microwatt powerpc/microwatt: Add support for hardware random number generator 2021-06-21 21:16:32 +10:00
pasemi powerpc updates for 5.15 2021-09-03 11:22:50 -07:00
powermac powerpc/powermac: Remove stale declaration of pmac_md 2021-10-09 00:15:58 +11:00
powernv powerpc/powernv/prd: Unregister OPAL_MSG_PRD2 notifier during module unload 2021-10-29 16:47:32 +11:00
ps3 powerpc updates for 5.15 2021-09-03 11:22:50 -07:00
pseries powerpc/pseries/mobility: ignore ibm, platform-facilities updates 2021-10-22 15:22:06 +11:00
fsl_uli1575.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
Kconfig powerpc/64s: Make prom_init require RELOCATABLE 2021-06-25 14:47:19 +10:00
Kconfig.cputype powerpc: Re-enable ARCH_ENABLE_SPLIT_PMD_PTLOCK 2021-08-20 12:38:50 +10:00
Makefile powerpc: Add Microwatt platform 2021-06-21 21:15:26 +10:00