Hi Kishon,
I have been testing ep framework for rockchip PCIe controller
for a while and see this warning accidentally by making some
mistake in my DT which leads some resource missing. So the probe
process halts and trigger this warning.
[ 0.986269] rockchip-pcie-ep f8000000.pcie-ep: invalid resource
[ 0.987346] ------------[ cut here ]------------
[ 0.987844] Device 'f8000000.pcie-ep' does not have a release()
function, it is broken and must be fixed.
[ 0.988981] WARNING: CPU: 3 PID: 1 at drivers/base/core.c:815
device_release+0x84/0x98
[ 0.989788] Modules linked in:
[ 0.990158] CPU: 3 PID: 1 Comm: swapper/0 Not tainted
4.15.0-next-20180209-00010-ge344474-dirty #171
[ 0.991085] Hardware name: Excavator-RK3399 Board (DT)
[ 0.991629] pstate: 60000005 (nZCv daif -PAN -UAO)
[ 0.992141] pc : device_release+0x84/0x98
[ 0.992573] lr : device_release+0x84/0x98
[ 0.992992] sp : ffff00000804bb30
[ 0.993342] x29: ffff00000804bb30 x28: 0000000000000000
[ 0.993912] x27: ffff00000900b970 x26: ffff000008f00624
[ 0.994478] x25: ffff00000915f000 x24: ffff00000804bc28
[ 0.995040] x23: ffff000009029000 x22: 0000000000000002
[ 0.995606] x21: ffff8000f1331d00 x20: ffff8000f0c9ac10
[ 0.996172] x19: ffff8000f0c9ac00 x18: ffffffffffffffff
[ 0.996739] x17: 000000000000037f x16: 0000000000000000
[ 0.997305] x15: ffff000009029b88 x14: 207369207469202c
[ 0.997872] x13: 6e6f6974636e7566 x12: 202928657361656c
[ 0.998439] x11: 6572206120657661 x10: 6820746f6e207365
[ 0.999006] x9 : 6f64202770652d65 x8 : 207473756d20646e
[ 0.999572] x7 : ffff0000085bfb28 x6 : 00000000000000b9
[ 1.000138] x5 : 0000000000000000 x4 : 0000000000000000
[ 1.000702] x3 : ffffffffffffffff x2 : ffff000009042f00
[ 1.001268] x1 : 39c1333e45671700 x0 : 0000000000000000
[ 1.001832] Call trace:
[ 1.002111] device_release+0x84/0x98
[ 1.002508] kobject_put+0x70/0xe0
[ 1.002880] device_unregister+0x20/0x30
[ 1.003302] pci_epc_destroy+0x20/0x38
[ 1.003704] devm_pci_epc_release+0x10/0x18
[ 1.004157] release_nodes+0x12c/0x230
[ 1.004564] devres_release_all+0x34/0x50
[ 1.004993] driver_probe_device+0xbc/0x308
[ 1.005436] __driver_attach+0xac/0xb0
[ 1.005837] bus_for_each_dev+0x68/0xc8
[ 1.006246] driver_attach+0x20/0x28
[ 1.006630] bus_add_driver+0x108/0x228
[ 1.007038] driver_register+0x60/0xf8
[ 1.007443] __platform_driver_register+0x40/0x48
[ 1.007943] rockchip_pcie_ep_driver_init+0x18/0x20
[ 1.008460] do_one_initcall+0x50/0x158
[ 1.008872] kernel_init_freeable+0x184/0x224
[ 1.009335] kernel_init+0x10/0x100
[ 1.009712] ret_from_fork+0x10/0x18
[ 1.010141] ---[ end trace 7a91d2001781494c ]---
[ 1.010797] rockchip-pcie-ep: probe of f8000000.pcie-ep failed with
error -22
