[linux-yocto] [PATCH] Fix kernel warnning on cfl-s(KBL PCH) board

[Liwei Song]

Backport an upstream patch,
fix the following kernel warnning on CoffeeLake + KabyLake PCH board:

[    3.689176] WARN_ON(!((dev_priv)->info.platform == INTEL_SKYLAKE) && !((dev_priv)->info.platform == INTEL_KABYLAKE))
[    3.689191] ------------[ cut here ]------------
[    3.690301] WARNING: CPU: 0 PID: 304 at /kernel-source//drivers/gpu/drm/i915/i915_drv.c:224 i915_driver_load+0x11a0/0x1430 [i915]
[    3.690873] Modules linked in: i915(+) ac video acpi_pad snd_hda_intel snd_hda_codec snd_hda_core snd_pcm snd_timer aesni_intel aes_x86_64 crypto_simd cryptd efi_pstore glue_helper fan wmi efivars openvswitch nf_defrag_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack
[    3.692111] CPU: 0 PID: 304 Comm: modprobe Not tainted 4.12.20-yocto-standard #1
[    3.692731] Hardware name: Intel Corporation Kabylake Client platform/KBL S DDR4 UDIMM EV CRB, BIOS KBLSE2R1.R00.X097.P00.1707031236 07/03/2017
[    3.693379] task: ffffa05932061d00 task.stack: ffffb919815d0000
[    3.694042] RIP: 0010:i915_driver_load+0x11a0/0x1430 [i915]
[    3.694694] RSP: 0000:ffffb919815d3b08 EFLAGS: 00010296
[    3.695353] RAX: 0000000000000068 RBX: ffffa0592cd28000 RCX: 0000000000000001
[    3.696019] RDX: 0000000080000001 RSI: 0000000000000092 RDI: 00000000ffffffff
[    3.696668] RBP: ffffb919815d3b48 R08: 0000000000000068 R09: 0000000000000302
[    3.697329] R10: ffffb919815d3a38 R11: 0000000000000000 R12: 0000000000000000
[    3.697969] R13: ffffa059345be000 R14: ffffa059340b8000 R15: ffffffffc02fe840
[    3.698610] FS:  00007f37b0412740(0000) GS:ffffa05936200000(0000) knlGS:0000000000000000
[    3.699259] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.699906] CR2: 00007f61de3d38a0 CR3: 00000002ad6f0003 CR4: 00000000003606f0
[    3.700559] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    3.701206] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    3.701841] Call Trace:
[    3.702493]  i915_pci_probe+0x27/0x50 [i915]
[    3.703127]  local_pci_probe+0x42/0xa0
[    3.703756]  ? pci_match_device+0xe5/0x110
[    3.704383]  pci_device_probe+0x13b/0x160
[    3.705009]  driver_probe_device+0x226/0x2e0
[    3.705636]  __driver_attach+0x91/0xa0
[    3.706260]  ? driver_probe_device+0x2e0/0x2e0
[    3.706883]  bus_for_each_dev+0x62/0x90
[    3.707503]  driver_attach+0x1e/0x20
[    3.708116]  bus_add_driver+0x19b/0x220
[    3.708728]  ? 0xffffffffc01c3000
[    3.709335]  driver_register+0x60/0xe0
[    3.709952]  ? 0xffffffffc01c3000
[    3.710637]  __pci_register_driver+0x49/0x50
[    3.711342]  i915_init+0x57/0x5a [i915]
[    3.711942]  do_one_initcall+0x41/0x160
[    3.712538]  ? kfree+0x17d/0x190
[    3.713129]  ? kfree+0x17d/0x190
[    3.713717]  do_init_module+0x5f/0x1fc
[    3.714376]  load_module+0x2266/0x25d0
[    3.714987]  SyS_finit_module+0xad/0xd0
[    3.715572]  ? SyS_finit_module+0xad/0xd0
[    3.716153]  entry_SYSCALL_64_fastpath+0x13/0x6c
[    3.716734] RIP: 0033:0x31f86ebae9
[    3.717386] RSP: 002b:00007fff2d4c7c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[    3.718082] RAX: ffffffffffffffda RBX: 00007fff2d4c5c60 RCX: 00000031f86ebae9
[    3.718676] RDX: 0000000000000000 RSI: 00000000004184a4 RDI: 0000000000000001
[    3.719273] RBP: 00000000006202d0 R08: 0000000000000000 R09: 0000000000000000
[    3.719866] R10: 0000000000000001 R11: 0000000000000246 R12: 00007fff2d4c5c58
[    3.720549] R13: 00000000006202d0 R14: 0000000000000025 R15: 00007fff2d4c5c60


Rodrigo Vivi (1):
  drm/i915/cfl: Coffee Lake works on Kaby Lake PCH.

 drivers/gpu/drm/i915/i915_drv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

-- 
2.7.4