[PATCH v2] ARM: Enable GICv2m on 32-bit virt machine
Tyler Baker
tyler.baker at linaro.org
Fri Dec 4 15:18:52 PST 2015
Hi Marc,
On 4 December 2015 at 00:08, Marc Zyngier <marc.zyngier at arm.com> wrote:
> On Thu, 3 Dec 2015 15:38:53 -0800
> Tyler Baker <tyler.baker at linaro.org> wrote:
>
> Hi Tyler,
>
>> Hi Pavel,
>>
>> On 27 November 2015 at 03:34, Pavel Fedin <p.fedin at samsung.com> wrote:
>> > Modern qemu includes GICv2m support for both 64 and 32 bits, therefore
>> > 32-bit guests may also use MSI.
>> >
>> > Signed-off-by: Pavel Fedin <p.fedin at samsung.com>
>>
>> The kernelci.org bot reported new boot failures[1] in Russell's tree
>> today. Specifically, it is causing boot regressions with
>> multi_v7_defconfig variants on the tegra124-jetson-tk1,
>> tegra30-beaver, and the armada-370-mirabox platforms, all of which
>> have PCI support. I had the bot bisect[2] the boot failures, and it
>> pointed to this commit. I reverted this commit locally and confirmed
>> it resolved the boot failures.
>>
>> The tegra platforms report the following stack traces[3][4].
>>
>> [ 3.606836] pcieport 0000:00:01.0: enabling device (0140 -> 0143)
>> [ 3.612942] Unable to handle kernel paging request at virtual
>> address ee2f2814
>> [ 3.620146] pgd = c0204000
>> [ 3.622840] [ee2f2814] *pgd=ae21141e(bad)
>> [ 3.626851] Internal error: Oops: 8000000d [#1] SMP ARM
>> [ 3.632059] Modules linked in:
>> [ 3.635109] CPU: 2 PID: 64 Comm: kworker/u8:1 Not tainted
>> 4.4.0-rc1-00015-g804df43a28db #1
>> [ 3.643351] Hardware name: NVIDIA Tegra SoC (Flattened Device Tree)
>> [ 3.649612] Workqueue: deferwq deferred_probe_work_func
>> [ 3.654825] task: ee0d3dc0 ti: ee642000 task.ti: ee642000
>> [ 3.660208] PC is at 0xee2f2814
>> [ 3.663351] LR is at msi_domain_alloc_irqs+0x2c/0x198
>> [ 3.668387] pc : [] lr : [] psr: a0000113
>> [ 3.668387] sp : ee643c08 ip : ee6d0040 fp : 00000000
>> [ 3.679837] r10: ee710000 r9 : ee6fa000 r8 : ee6ea0f4
>> [ 3.685044] r7 : ee17dc10 r6 : 00000003 r5 : 00000001 r4 : 00000001
>> [ 3.691552] r3 : ee2f2814 r2 : ee6fa068 r1 : ee6ea0f4 r0 : ee710000
>> [ 3.698063] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
>> [ 3.705177] Control: 10c5387d Table: 8020404a DAC: 00000051
>> [ 3.710905] Process kworker/u8:1 (pid: 64, stack limit = 0xee642220)
>> [ 3.717242] Stack: (0xee643c08 to 0xee644000)
>> [ 3.721586] 3c00: ee6fa000 ee6fa068 00000000
>> ee6fa068 00000002 ee6f9c00
>> [ 3.729742] 3c20: ee643c5e c04f0ad4 ee643c3c ee6d0040 00000001
>> 00000003 00000001 00000001
>> [ 3.737900] 3c40: ee6fa000 ee6fa068 00000000 c0509af0 00000004
>> ee6fa174 ee6fa000 00820001
>> [ 3.746056] 3c60: 00000002 00000000 ee6fa000 00000002 00000001
>> 00000000 ee643d88 c0a65b2c
>> [ 3.754213] 3c80: c0ff494c c0506298 ee6cf9b0 c03663a4 ee6fa068
>> 00000000 00000000 00000000
>> [ 3.762370] 3ca0: 00000001 c0366634 00000004 ee6c8b90 ee3f6aa0
>> ee6fa068 ee6fa0cc ee6fa000
>> [ 3.770526] 3cc0: c0f475cc ee6fa000 c0f47600 00000000 ee643d88
>> c0a65b2c c0ff494c c050656c
>> [ 3.778683] 3ce0: c0506530 ee6fa068 c0f475cc c04fafa4 c04faf20
>> ee6fa068 c1008f20 00000000
>> [ 3.786840] 3d00: c0f47600 00000009 00000100 c06343f0 00000000
>> ee643d40 c06346a4 00000000
>> [ 3.794996] 3d20: 00010000 c0632a7c ee041c70 ee3f5538 ee6fa068
>> ee6fa09c ee6f9c00 c0634184
>> [ 3.803153] 3d40: ee6fa068 00000000 ee6f9c14 ee6fa000 ee6f9c14
>> ee6f9c00 ee6f9c00 c04f1d98
>> [ 3.811310] 3d60: ee6fa000 c04f1eb8 ee6f9c0c ee6ca800 ee6f9c0c
>> c0215e94 ee6ca820 ee6ea0f4
>> [ 3.819467] 3d80: c0636d9c ee17dc10 ee6ca800 ee6ca800 ee6ea154
>> ee6ea010 ee6ea0f4 ee643ddc
>> [ 3.827624] 3da0: ee6b7810 f087e928 ee6ea010 c0a660e4 ee6ea010
>> c050f280 c0c97324 ee6ea010
>> [ 3.835780] 3dc0: 00000000 ee17dc10 ee17dc00 00000033 c0a664f4
>> ee6ea158 c100e0fc ee6ea010
>> [ 3.843937] 3de0: eefc5b34 c1f003e4 c1f003e4 00000006 00000001
>> 28000000 3fffffff eefc5b8c
>> [ 3.852094] 3e00: 00002200 00000000 00000000 00000000 2d646476
>> 62786570 7075732d 00796c70
>> [ 3.860251] 3e20: 796c7000 00000000 00000000 00000000 ee6ea0f4
>> c0f479e4 00000001 ee643ddc
>> [ 3.868407] 3e40: c050df88 00000000 00000000 00000000 00000000
>> c050df4c 00000000 ee16ec80
>> [ 3.876564] 3e60: 00000001 fffffffe ee17dc10 fffffdfb c0f47920
>> 00000008 ee51eb00 00000000
>> [ 3.884720] 3e80: ee00b800 c0635a88 c0635a38 ee17dc10 c1008f20
>> 00000000 c0f47920 c06343f0
>> [ 3.892877] 3ea0: 00000000 ee643ed0 c06346a4 00000001 00000000
>> c0632a7c ee03af70 ee3f5738
>> [ 3.901033] 3ec0: ee17dc10 ee17dc44 c0f62978 c0634184 ee17dc10
>> 00000001 00000000 ee17dc10
>> [ 3.909190] 3ee0: ee17dc10 c0f62978 ee660700 c06338fc ee17dc10
>> c0f62918 c0f62900 c0633cd8
>> [ 3.917347] 3f00: ee51eb00 c0f62934 ee00b800 c025ec38 ee00b814
>> ee00b964 ee00b848 ee00b814
>> [ 3.925503] 3f20: 00000001 ee00b800 ee51eb18 00000088 ee51eb00
>> ee00b800 ee00b800 c025ee98
>> [ 3.933660] 3f40: ee0d3dc0 ee51f440 00000000 ee51eb00 c025ee70
>> 00000000 00000000 00000000
>> [ 3.941816] 3f60: 00000000 c0264010 ee073440 00000000 ffffffff
>> ee51eb00 00000000 00000000
>> [ 3.949973] 3f80: ee643f80 ee643f80 00000000 00000000 ee643f90
>> ee643f90 ee643fac ee51f440
>> [ 3.958129] 3fa0: c0263f38 00000000 00000000 c0210c38 00000000
>> 00000000 00000000 00000000
>> [ 3.966286] 3fc0: 00000000 00000000 00000000 00000000 00000000
>> 00000000 00000000 00000000
>> [ 3.974443] 3fe0: 00000000 00000000 00000000 00000000 00000013
>> 00000000 ffffffff ffffffff
>> [ 3.982618] [] (msi_domain_alloc_irqs) from []
>> (pci_enable_msi_range+0x1b0/0x2e0)
>> [ 3.991829] [] (pci_enable_msi_range) from []
>> (pcie_port_device_register+0x2e8/0x440)
>> [ 4.001377] [] (pcie_port_device_register) from []
>> (pcie_portdrv_probe+0x3c/0x68)
>> [ 4.010587] [] (pcie_portdrv_probe) from [] (pci_device_probe+0x84/0xd4)
>> [ 4.019010] [] (pci_device_probe) from [] (driver_probe_device+0x1e0/0x2a8)
>> [ 4.027692] [] (driver_probe_device) from [] (bus_for_each_drv+0x44/0x8c)
>> [ 4.036197] [] (bus_for_each_drv) from [] (__device_attach+0xa0/0x104)
>> [ 4.044450] [] (__device_attach) from [] (pci_bus_add_device+0x34/0x60)
>> [ 4.052783] [] (pci_bus_add_device) from [] (pci_bus_add_devices+0x3c/0x84)
>> [ 4.061465] [] (pci_bus_add_devices) from []
>> (pci_common_init_dev+0x180/0x324)
>> [ 4.070409] [] (pci_common_init_dev) from [] (tegra_pcie_probe+0x1138/0x198c)
>> [ 4.079264] [] (tegra_pcie_probe) from [] (platform_drv_probe+0x50/0xac)
>> [ 4.087683] [] (platform_drv_probe) from [] (driver_probe_device+0x1e0/0x2a8)
>> [ 4.096534] [] (driver_probe_device) from [] (bus_for_each_drv+0x44/0x8c)
>> [ 4.105037] [] (bus_for_each_drv) from [] (__device_attach+0xa0/0x104)
>> [ 4.113281] [] (__device_attach) from [] (bus_probe_device+0x84/0x8c)
>> [ 4.121440] [] (bus_probe_device) from []
>> (deferred_probe_work_func+0x5c/0x88)
>> [ 4.130383] [] (deferred_probe_work_func) from []
>> (process_one_work+0x134/0x338)
>> [ 4.139495] [] (process_one_work) from [] (worker_thread+0x28/0x4cc)
>> [ 4.147573] [] (worker_thread) from [] (kthread+0xd8/0xf4)
>> [ 4.154786] [] (kthread) from [] (ret_from_fork+0x14/0x3c)
>> [ 4.161992] Code: 00000000 ee542808 ee699580 ee51fd00 (ee73800c)
>> [ 4.168070] ---[ end trace acac6abc238bf853 ]---
>> [ 4.172740] Unable to handle kernel paging request at virtual
>> address ffffffec
>> [ 4.179943] pgd = c0204000
>> [ 4.182637] [ffffffec] *pgd=afffd861, *pte=00000000, *ppte=00000000
>> [ 4.188902] Internal error: Oops: 37 [#2] SMP ARM
>> [ 4.193589] Modules linked in:
>> [ 4.196637] CPU: 2 PID: 64 Comm: kworker/u8:1 Tainted: G D
>> 4.4.0-rc1-00015-g804df43a28db #1
>> [ 4.206092] Hardware name: NVIDIA Tegra SoC (Flattened Device Tree)
>> [ 4.212345] task: ee0d3dc0 ti: ee642000 task.ti: ee642000
>> [ 4.217731] PC is at kthread_data+0x4/0xc
>> [ 4.221728] LR is at wq_worker_sleeping+0xc/0xd0
>> [ 4.226331] pc : [] lr : [] psr: 00000193
>> [ 4.226331] sp : ee6439e8 ip : 00000001 fp : ee643a34
>> [ 4.237780] r10: c0ec467c r9 : ee0d3dc0 r8 : c0ec0080
>> [ 4.242988] r7 : 00000002 r6 : ee0d4050 r5 : c0ec0080 r4 : 00000002
>> [ 4.249496] r3 : 00000000 r2 : 00000000 r1 : 00000002 r0 : ee0d3dc0
>> [ 4.256004] Flags: nzcv IRQs off FIQs on Mode SVC_32 ISA ARM
>> Segment none
>> [ 4.263206] Control: 10c5387d Table: 8020404a DAC: 00000051
>> [ 4.268934] Process kworker/u8:1 (pid: 64, stack limit = 0xee642220)
>> [ 4.275268] Stack: (0xee6439e8 to 0xee644000)
>> [ 4.279611] 39e0: eefaf080 c09c68f4 00000000
>> ee396400 c0fcb754 00000000
>> [ 4.287769] 3a00: ee0d3dc0 c09c6ca8 00000000 2e0ef000 00000000
>> ee64381c ee070000 ee0d3fc8
>> [ 4.295925] 3a20: ee643a40 0000000b 00000001 00000001 ee643a3c
>> c09c6ca8 ee0d3dc0 c024d3d4
>> [ 4.304082] 3a40: ee643a40 ee643a40 00000001 c0fc9604 ee643bb8
>> c0ec955c 60000193 0000000b
>> [ 4.312239] 3a60: 00000001 ee2f2816 ee2f2818 c02141c4 ee642220
>> 0000000b 00000000 c0ec955c
>> [ 4.320396] 3a80: 00000000 00000008 30000000 30303030 20303030
>> 34356565 38303832 36656520
>> [ 4.328552] 3aa0: 38353939 65652030 64663135 28203030 33376565
>> 63303038 c0002029 ee643adc
>> [ 4.336709] 3ac0: c0fef370 ee2f2814 8000000d c0efa440 ee643bb8
>> ee643bb8 ee6fa000 ee710000
>> [ 4.344866] 3ae0: 00000000 c0224e80 c0efa440 c02203d8 60000113
>> 00000000 00000000 0000000d
>> [ 4.353023] 3b00: c0220488 c0ec9bec ee2f2814 c0220490 0000000d
>> c020a330 ee643bf4 c0cb7348
>> [ 4.361180] 3b20: 0000000e c0630e50 c0cb7348 ee643bf4 60000113
>> 00000004 53425553 45545359
>> [ 4.369336] 3b40: 63703d4d 45440069 45434956 63702b3d 30303a69
>> 303a3030 31303a30 c000302e
>> [ 4.377493] 3b60: 60000113 ffffffff 00000101 c02885d0 00000400
>> c0286a4c 00000101 00000000
>> [ 4.385650] 3b80: c0fec998 60000113 00000001 c0fccf34 00000000
>> c0fcca18 0000003f 00000003
>> [ 4.393807] 3ba0: ee2f2814 a0000113 ffffffff ee643bec ee6ea0f4
>> c02149cc ee710000 ee6ea0f4
>> [ 4.401963] 3bc0: ee6fa068 ee2f2814 00000001 00000001 00000003
>> ee17dc10 ee6ea0f4 ee6fa000
>> [ 4.410119] 3be0: ee710000 00000000 ee6d0040 ee643c08 c0291fc0
>> ee2f2814 a0000113 ffffffff
>> [ 4.418276] 3c00: 00000051 00000001 ee6fa000 ee6fa068 00000000
>> ee6fa068 00000002 ee6f9c00
>> [ 4.426433] 3c20: ee643c5e c04f0ad4 ee643c3c ee6d0040 00000001
>> 00000003 00000001 00000001
>> [ 4.434590] 3c40: ee6fa000 ee6fa068 00000000 c0509af0 00000004
>> ee6fa174 ee6fa000 00820001
>> [ 4.442747] 3c60: 00000002 00000000 ee6fa000 00000002 00000001
>> 00000000 ee643d88 c0a65b2c
>> [ 4.450903] 3c80: c0ff494c c0506298 ee6cf9b0 c03663a4 ee6fa068
>> 00000000 00000000 00000000
>> [ 4.459060] 3ca0: 00000001 c0366634 00000004 ee6c8b90 ee3f6aa0
>> ee6fa068 ee6fa0cc ee6fa000
>> [ 4.467217] 3cc0: c0f475cc ee6fa000 c0f47600 00000000 ee643d88
>> c0a65b2c c0ff494c c050656c
>> [ 4.475373] 3ce0: c0506530 ee6fa068 c0f475cc c04fafa4 c04faf20
>> ee6fa068 c1008f20 00000000
>> [ 4.483530] 3d00: c0f47600 00000009 00000100 c06343f0 00000000
>> ee643d40 c06346a4 00000000
>> [ 4.491687] 3d20: 00010000 c0632a7c ee041c70 ee3f5538 ee6fa068
>> ee6fa09c ee6f9c00 c0634184
>> [ 4.499843] 3d40: ee6fa068 00000000 ee6f9c14 ee6fa000 ee6f9c14
>> ee6f9c00 ee6f9c00 c04f1d98
>> [ 4.508002] 3d60: ee6fa000 c04f1eb8 ee6f9c0c ee6ca800 ee6f9c0c
>> c0215e94 ee6ca820 ee6ea0f4
>> [ 4.516160] 3d80: c0636d9c ee17dc10 ee6ca800 ee6ca800 ee6ea154
>> ee6ea010 ee6ea0f4 ee643ddc
>> [ 4.524318] 3da0: ee6b7810 f087e928 ee6ea010 c0a660e4 ee6ea010
>> c050f280 c0c97324 ee6ea010
>> [ 4.532475] 3dc0: 00000000 ee17dc10 ee17dc00 00000033 c0a664f4
>> ee6ea158 c100e0fc ee6ea010
>> [ 4.540632] 3de0: eefc5b34 c1f003e4 c1f003e4 00000006 00000001
>> 28000000 3fffffff eefc5b8c
>> [ 4.548788] 3e00: 00002200 00000000 00000000 00000000 2d646476
>> 62786570 7075732d 00796c70
>> [ 4.556945] 3e20: 796c7000 00000000 00000000 00000000 ee6ea0f4
>> c0f479e4 00000001 ee643ddc
>> [ 4.565101] 3e40: c050df88 00000000 00000000 00000000 00000000
>> c050df4c 00000000 ee16ec80
>> [ 4.573258] 3e60: 00000001 fffffffe ee17dc10 fffffdfb c0f47920
>> 00000008 ee51eb00 00000000
>> [ 4.581414] 3e80: ee00b800 c0635a88 c0635a38 ee17dc10 c1008f20
>> 00000000 c0f47920 c06343f0
>> [ 4.589571] 3ea0: 00000000 ee643ed0 c06346a4 00000001 00000000
>> c0632a7c ee03af70 ee3f5738
>> [ 4.597727] 3ec0: ee17dc10 ee17dc44 c0f62978 c0634184 ee17dc10
>> 00000001 00000000 ee17dc10
>> [ 4.605884] 3ee0: ee17dc10 c0f62978 ee660700 c06338fc ee17dc10
>> c0f62918 c0f62900 c0633cd8
>> [ 4.614040] 3f00: ee51eb00 c0f62934 ee00b800 c025ec38 ee00b814 ee00b9
>>
>> The Mirabox reports the following stack trace[5].
>>
>> [ 1.620587] xhci_hcd 0000:02:00.0: hcc params 0x0200f181 hci
>> version 0x96 quirks 0x00000000
>> [ 1.629057] Unable to handle kernel NULL pointer dereference at
>> virtual address 00000004
>> [ 1.637200] pgd = c0204000
>> [ 1.639919] [00000004] *pgd=00000000
>> [ 1.643540] Internal error: Oops: 17 [#1] SMP ARM
>> [ 1.648265] Modules linked in:
>> [ 1.651346] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
>> 4.4.0-rc1-00015-g804df43a28db #1
>> [ 1.659296] Hardware name: Marvell Armada 370/XP (Device Tree)
>> [ 1.665155] task: db050000 ti: db04a000 task.ti: db04a000
>> [ 1.670589] PC is at msi_domain_alloc_irqs+0x1c/0x198
>> [ 1.675666] LR is at pci_enable_msix+0x244/0x3d8
>> [ 1.680305] pc : [] lr : [] psr: a0000013
>> [ 1.680305] sp : db04bd30 ip : 00000000 fp : 00000002
>> [ 1.691832] r10: db006000 r9 : db229174 r8 : 00000000
>> [ 1.697079] r7 : db229068 r6 : db428f40 r5 : db229000 r4 : 00000002
>> [ 1.703634] r3 : db006000 r2 : db229068 r1 : db229068 r0 : db006000
>> [ 1.710190] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
>> [ 1.717356] Control: 10c5387d Table: 1b438019 DAC: 00000051
>> [ 1.723125] Process swapper/0 (pid: 1, stack limit = 0xdb04a220)
>> [ 1.729157] Stack: (0xdb04bd30 to 0xdb04c000)
>> [ 1.733535] bd20: 00000000
>> 024080c0 db229068 db229068
>> [ 1.741751] bd40: db229174 00000001 00000000 c03056d4 db229068
>> 00000002 db229000 db428f40
>> [ 1.749967] bd60: db229068 e086c000 db229174 00000001 00000002
>> c0509ea4 00070013 00002000
>> [ 1.758183] bd80: e08398c0 00000002 db428f40 db229000 00000002
>> db440000 db229068 00000001
>> [ 1.766400] bda0: 00000003 c050a064 00000002 db440000 db440150
>> db440150 db440000 c07a43a8
>> [ 1.774615] bdc0: db229000 00000000 db440000 db229000 00000000
>> db440000 00000000 db4400c0
>> [ 1.782831] bde0: 00000000 00000080 c100cb0c 00000001 00000003
>> c076baec 00000004 00000000
>> [ 1.791048] be00: db229000 db45a000 db440000 db229000 c0adaef4
>> db440000 c0ec5ad8 00000000
>> [ 1.799264] be20: 00000000 db229068 00000001 c077b4f4 00000000
>> db218370 db4241e0 db229000
>> [ 1.807480] be40: db229130 db229000 c0ec5ad8 00000000 c0e5683c
>> c0adaef4 00000000 c07b3690
>> [ 1.815697] be60: db229068 c0f77f64 db229000 c0f77f98 00000000
>> c04fafa4 c04faf20 db229068
>> [ 1.823913] be80: c1008f20 00000000 c0f77f98 00000000 00000000
>> c06343f0 db229068 c0f77f98
>> [ 1.832129] bea0: db22909c 00000000 c0df993c c0634544 00000000
>> c0f77f98 c06344b8 c0632b18
>> [ 1.840346] bec0: db07955c db20dfb4 c0f77f98 db429a00 c0f47178
>> c0633ae0 c0adaee8 c0ec5ad8
>> [ 1.848562] bee0: c0f77f98 c0f77f98 c0ec8218 db428a00 c0fc9000
>> c0634d30 c0f77f64 c0ec8218
>> [ 1.856779] bf00: c0ec8218 c020ad08 00000010 c0fc9000 c0d7143c
>> c0e5683c 00000000 c035d6fc
>> [ 1.864995] bf20: 00000000 c0ef6dd4 dbfffe5b c09e8848 00000108
>> c02639d8 c0e5683c c0ce6d84
>> [ 1.873211] bf40: c0d6ff9c 00000000 00000006 00000006 c0ef6d9c
>> dbfffe40 c0ebb6c8 00000006
>> [ 1.881427] bf60: c0e56830 c0fc9000 00000108 c0e5683c c0dbb598
>> c0dbbd9c 00000006 00000006
>> [ 1.889643] bf80: 00000000 c0dbb598 00000000 c09c527c 00000000
>> 00000000 00000000 00000000
>> [ 1.897859] bfa0: 00000000 c09c5284 00000000 c0210c38 00000000
>> 00000000 00000000 00000000
>> [ 1.906075] bfc0: 00000000 00000000 00000000 00000000 00000000
>> 00000000 00000000 00000000
>> [ 1.914291] bfe0: 00000000 00000000 00000000 00000000 00000013
>> 00000000 ffff0000 ffff0000
>> [ 1.922514] [] (msi_domain_alloc_irqs) from [] (pci_enable_msix+0x244/0x3d8)
>> [ 1.931343] [] (pci_enable_msix) from [] (pci_enable_msix_range+0x2c/0x64)
>> [ 1.939999] [] (pci_enable_msix_range) from [] (xhci_run+0x130/0x628)
>> [ 1.948225] [] (xhci_run) from [] (usb_add_hcd+0x38c/0x830)
>> [ 1.955573] [] (usb_add_hcd) from [] (usb_hcd_pci_probe+0x198/0x370)
>> [ 1.963708] [] (usb_hcd_pci_probe) from [] (xhci_pci_probe+0x2c/0x11c)
>> [ 1.972017] [] (xhci_pci_probe) from [] (pci_device_probe+0x84/0xd4)
>> [ 1.980151] [] (pci_device_probe) from [] (driver_probe_device+0x1e0/0x2a8)
>> [ 1.988891] [] (driver_probe_device) from [] (__driver_attach+0x8c/0x90)
>> [ 1.997368] [] (__driver_attach) from [] (bus_for_each_dev+0x54/0x88)
>> [ 2.005584] [] (bus_for_each_dev) from [] (bus_add_driver+0xe8/0x1f4)
>> [ 2.013801] [] (bus_add_driver) from [] (driver_register+0x78/0xf4)
>> [ 2.021844] [] (driver_register) from [] (do_one_initcall+0x84/0x1d4)
>> [ 2.030062] [] (do_one_initcall) from [] (kernel_init_freeable+0x11c/0x1e8)
>> [ 2.038809] [] (kernel_init_freeable) from [] (kernel_init+0x8/0xec)
>> [ 2.046942] [] (kernel_init) from [] (ret_from_fork+0x14/0x3c)
>> [ 2.054548] Code: e1a04002 e58d100c e1a02001 e1a0a000 (e5987004)
>> [ 2.060713] ---[ end trace d8caeed57a0ae8f6 ]---
>>
>> I have not had the time to dig much deeper, so I figured I would send
>> this report for wider review. I am always willing to re-test any fixes
>> that may come about from this discussion, just let me know!
>
> This looks a lot like something I've recently fixed:
>
> https://lkml.org/lkml/2015/11/23/388
>
> Can you give it a go and let me know if that helps?
I added this patch on top of Russell's tree (for-next) and pushed it
out for kernelci.org to build and boot test. I can confirm it
resolves[1] the issues reported above. The patch also landed in -next,
so next-20151203[2] is regression free as well.
Thanks for the quick responses.
Cheers,
Tyler
[1] http://kernelci.org/boot/all/job/tbaker/kernel/v4.4-rc1-16-g78ed6b39a36e/
[2] http://kernelci.org/boot/all/job/next/kernel/next-20151203/
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