On Tue, Nov 17, 2020 at 04:38:03PM +0800, JC Kuo wrote:
> In commit "phy: tegra: xusb: Add usb-phy support", an OTG capable PHY
> device, such as phy-usb2.0 device of Jetson-TX1 platform, will be
> bound to the tegra-xusb-padctl driver by the following line in
> tegra_xusb_setup_usb_role_switch().
>
> port->usb_phy.dev->driver = port->padctl->dev->driver;
>
> With this, dev_pm_ops set of tegra-xusb-padctl driver will be invoked
> for the OTG capable PHY incorrectly as below logs show.
>
> This commit fixes the issue by assigning an empty driver to it.
>
> [ 153.451108] tegra-xusb-padctl phy-usb2.0: > tegra_xusb_padctl_suspend_noirq(dev=ffff000080917000)
> [ 153.460353] tegra-xusb-padctl phy-usb2.0: driver: ffff8000114453e0 (tegra_xusb_padctl_driver)
> [ 153.469245] tegra-xusb-padctl phy-usb2.0: padctl: ffff0000829f6480
> [ 153.475772] tegra-xusb-padctl phy-usb2.0: soc: ef7bdd7fffffffff (0xef7bdd7fffffffff)
> [ 153.484061] Unable to handle kernel paging request at virtual address 007bdd800000004f
> [ 153.492132] Mem abort info:
> [ 153.495083] ESR = 0x96000004
> [ 153.498308] EC = 0x25: DABT (current EL), IL = 32 bits
> [ 153.503771] SET = 0, FnV = 0
> [ 153.506979] EA = 0, S1PTW = 0
> [ 153.510260] Data abort info:
> [ 153.513200] ISV = 0, ISS = 0x00000004
> [ 153.517181] CM = 0, WnR = 0
> [ 153.520302] [007bdd800000004f] address between user and kernel address ranges
> [ 153.527600] Internal error: Oops: 96000004 [#1] PREEMPT SMP
> [ 153.533231] Modules linked in: nouveau panel_simple tegra_video(C) tegra_drm drm_ttm_helper videobuf2_dma_contig ttm videobuf2_memops cec videobuf2_v4l2 videobuf2_common drm_kms_helper v4l2_fwnode videodev drm mc snd_hda_codec_hdmi cdc_ether usbnet snd_hda_tegra r8152 crct10dif_ce snd_hda_codec snd_hda_core tegra_xudc host1x lp855x_bl at24 ip_tables x_tables ipv6
> [ 153.566417] CPU: 0 PID: 300 Comm: systemd-sleep Tainted: G C 5.10.0-rc3-next-20201113-00019-g5c064d5372b0-dirty #624
> [ 153.578283] Hardware name: NVIDIA Jetson TX1 Developer Kit (DT)
> [ 153.584281] pstate: 40000005 (nZcv daif -PAN -UAO -TCO BTYPE=--)
> [ 153.590381] pc : tegra_xusb_padctl_suspend_noirq+0x88/0x100
> [ 153.596016] lr : tegra_xusb_padctl_suspend_noirq+0x80/0x100
> [ 153.601632] sp : ffff8000120dbb60
> [ 153.604999] x29: ffff8000120dbb60 x28: ffff000080a1df00
> [ 153.610430] x27: 0000000000000002 x26: ffff8000106f8540
> [ 153.615858] x25: ffff8000113ac4a4 x24: ffff80001148c198
> [ 153.621277] x23: ffff800010c4538c x22: 0000000000000002
> [ 153.626692] x21: ffff800010ccde80 x20: ffff0000829f6480
> [ 153.632107] x19: ffff000080917000 x18: 0000000000000030
> [ 153.637521] x17: 0000000000000000 x16: 0000000000000000
> [ 153.642933] x15: ffff000080a1e380 x14: 74636461702d6273
> [ 153.648346] x13: ffff8000113ad058 x12: 0000000000000f39
> [ 153.653759] x11: 0000000000000513 x10: ffff800011405058
> [ 153.659176] x9 : 00000000fffff000 x8 : ffff8000113ad058
> [ 153.664590] x7 : ffff800011405058 x6 : 0000000000000000
> [ 153.670002] x5 : 0000000000000000 x4 : ffff0000fe908bc0
> [ 153.675414] x3 : ffff0000fe910228 x2 : 162ef67e0581e700
> [ 153.680826] x1 : 162ef67e0581e700 x0 : ef7bdd7fffffffff
> [ 153.686241] Call trace:
> [ 153.688769] tegra_xusb_padctl_suspend_noirq+0x88/0x100
> [ 153.694077] __device_suspend_noirq+0x68/0x1cc
> [ 153.698594] dpm_noirq_suspend_devices+0x10c/0x1d0
> [ 153.703456] dpm_suspend_noirq+0x28/0xa0
> [ 153.707461] suspend_devices_and_enter+0x234/0x4bc
> [ 153.712314] pm_suspend+0x1e4/0x270
> [ 153.715868] state_store+0x8c/0x110
> [ 153.719440] kobj_attr_store+0x1c/0x30
> [ 153.723259] sysfs_kf_write+0x4c/0x7c
> [ 153.726981] kernfs_fop_write+0x124/0x240
> [ 153.731065] vfs_write+0xe4/0x204
> [ 153.734449] ksys_write+0x6c/0x100
> [ 153.737925] __arm64_sys_write+0x20/0x30
> [ 153.741931] el0_svc_common.constprop.0+0x78/0x1a0
> [ 153.746789] do_el0_svc+0x24/0x90
> [ 153.750181] el0_sync_handler+0x254/0x260
> [ 153.754251] el0_sync+0x174/0x180
> [ 153.757663] Code: aa0303e2 94000f64 f9405680 b40000e0 (f9402803)
> [ 153.763826] ---[ end trace 81543a3394cb409d ]---
>
> Fixes: e8f7d2f409a1 ("phy: tegra: xusb: Add usb-phy support")
>
> Signed-off-by: JC Kuo <jckuo@xxxxxxxxxx>
> ---
> drivers/phy/tegra/xusb.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Acked-by: Thierry Reding <treding@xxxxxxxxxx>
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