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linux/drivers/usb/host
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Li Jun 1449cb2c22 usb: host: xhci-plat: keep runtime active when removing host 
While removing the host (e.g. for USB role switch from host to device),
if runtime pm is enabled by user, below oops occurs on dwc3 and cdns3
platforms.
Keeping the xhci-plat device active during host removal, and disabling
runtime pm before calling pm_runtime_set_suspended() fixes them.

oops1:
Unable to handle kernel NULL pointer dereference at virtual address
0000000000000240
Internal error: Oops: 96000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.4.3-00107-g64d454a-dirty
Hardware name: FSL i.MX8MP EVK (DT)
Workqueue: pm pm_runtime_work
pstate: 60000005 (nZCv daif -PAN -UAO)
pc : xhci_suspend+0x34/0x698
lr : xhci_plat_runtime_suspend+0x2c/0x38
sp : ffff800011ddbbc0
Call trace:
 xhci_suspend+0x34/0x698
 xhci_plat_runtime_suspend+0x2c/0x38
 pm_generic_runtime_suspend+0x28/0x40
 __rpm_callback+0xd8/0x138
 rpm_callback+0x24/0x98
 rpm_suspend+0xe0/0x448
 rpm_idle+0x124/0x140
 pm_runtime_work+0xa0/0xf8
 process_one_work+0x1dc/0x370
 worker_thread+0x48/0x468
 kthread+0xf0/0x120
 ret_from_fork+0x10/0x1c

oops2:
usb 2-1: USB disconnect, device number 2
xhci-hcd xhci-hcd.1.auto: remove, state 4
usb usb2: USB disconnect, device number 1
xhci-hcd xhci-hcd.1.auto: USB bus 2 deregistered
xhci-hcd xhci-hcd.1.auto: remove, state 4
usb usb1: USB disconnect, device number 1
Unable to handle kernel NULL pointer dereference at virtual address
0000000000000138
Internal error: Oops: 96000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 2 PID: 7 Comm: kworker/u8:0 Not tainted 5.6.0-rc4-next-20200304-03578
Hardware name: Freescale i.MX8QXP MEK (DT)
Workqueue: 1-0050 tcpm_state_machine_work
pstate: 20000005 (nzCv daif -PAN -UAO)
pc : xhci_free_dev+0x214/0x270
lr : xhci_plat_runtime_resume+0x78/0x88
sp : ffff80001006b5b0
Call trace:
 xhci_free_dev+0x214/0x270
 xhci_plat_runtime_resume+0x78/0x88
 pm_generic_runtime_resume+0x30/0x48
 __rpm_callback+0x90/0x148
 rpm_callback+0x28/0x88
 rpm_resume+0x568/0x758
 rpm_resume+0x260/0x758
 rpm_resume+0x260/0x758
 __pm_runtime_resume+0x40/0x88
 device_release_driver_internal+0xa0/0x1c8
 device_release_driver+0x1c/0x28
 bus_remove_device+0xd4/0x158
 device_del+0x15c/0x3a0
 usb_disable_device+0xb0/0x268
 usb_disconnect+0xcc/0x300
 usb_remove_hcd+0xf4/0x1dc
 xhci_plat_remove+0x78/0xe0
 platform_drv_remove+0x30/0x50
 device_release_driver_internal+0xfc/0x1c8
 device_release_driver+0x1c/0x28
 bus_remove_device+0xd4/0x158
 device_del+0x15c/0x3a0
 platform_device_del.part.0+0x20/0x90
 platform_device_unregister+0x28/0x40
 cdns3_host_exit+0x20/0x40
 cdns3_role_stop+0x60/0x90
 cdns3_role_set+0x64/0xd8
 usb_role_switch_set_role.part.0+0x3c/0x68
 usb_role_switch_set_role+0x20/0x30
 tcpm_mux_set+0x60/0xf8
 tcpm_reset_port+0xa4/0xf0
 tcpm_detach.part.0+0x28/0x50
 tcpm_state_machine_work+0x12ac/0x2360
 process_one_work+0x1c8/0x470
 worker_thread+0x50/0x428
 kthread+0xfc/0x128
 ret_from_fork+0x10/0x18
Code: c8037c02 35ffffa3 17ffe7c3 f9800011 (c85f7c01)
---[ end trace 45b1a173d2679e44 ]---

[minor commit message cleanup  -Mathias]
Cc: Baolin Wang <baolin.wang@linaro.org>
Cc: <stable@vger.kernel.org>
Fixes: b0c69b4bac ("usb: host: plat: Enable xHCI plat runtime PM")
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Tested-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20200514110432.25564-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-14 13:44:37 +02:00
..
bcma-hcd.c USB: bcma: Add a check for devm_gpiod_get 2019-11-04 15:50:38 +01:00
ehci-atmel.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ehci-dbg.c USB: ehci-hcd: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
ehci-exynos.c usb: exynos: Rename Samsung and Exynos to lowercase 2020-01-09 10:53:38 +01:00
ehci-fsl.c usb: host: Stops USB controller init if PLL fails to lock 2019-07-03 18:52:20 +02:00
ehci-fsl.h usb: phy: Workaround for USB erratum-A005728 2019-07-03 18:52:20 +02:00
ehci-grlib.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
ehci-hcd.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
ehci-hub.c USB: ehci-hcd: Add get_resuming_ports method 2018-06-25 21:44:43 +08:00
ehci-mem.c Revert "usb: host: ehci: Use dma_pool_zalloc()" 2018-05-04 14:35:12 -07:00
ehci-mv.c USB: EHCI: ehci-mv: use a unique bus name 2020-03-12 09:49:29 +01:00
ehci-mxc.c
ehci-npcm7xx.c USB: host: ehci-npcm7xx: Fix some error codes in probe 2018-06-28 19:32:42 +09:00
ehci-omap.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ehci-orion.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ehci-pci.c usb: host: ehci-pci: remove useless cast for driver.name 2020-02-19 11:10:27 +01:00
ehci-platform.c usb: host: ehci-platform: add a quirk to avoid stuck 2020-02-10 11:15:27 -08:00
ehci-pmcmsp.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
ehci-ppc-of.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
ehci-ps3.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
ehci-q.c USB: EHCI: Do not return -EPIPE when hub is disconnected 2019-12-17 16:02:49 +01:00
ehci-sched.c usb: host: ehci-sched: remove redundant pointer dev 2018-07-13 15:41:56 +02:00
ehci-sh.c usb: host: ehci-sh: Remove unused platform data support 2019-12-10 11:34:27 +01:00
ehci-spear.c
ehci-st.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ehci-sysfs.c USB: move many drivers to use DEVICE_ATTR_RW 2018-01-24 08:49:51 +01:00
ehci-tegra.c USB: Replace zero-length array with flexible-array member 2020-02-23 19:24:51 +01:00
ehci-timer.c usb: host: Replace empty define with do while 2018-09-28 15:03:37 +02:00
ehci-xilinx-of.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
ehci.h USB: Replace zero-length array with flexible-array member 2020-02-23 19:24:51 +01:00
fhci-dbg.c USB: fhci-hcd: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
fhci-hcd.c usb: host: fhci-hcd: annotate PIPE_CONTROL switch case with fallthrough 2020-02-19 11:08:52 +01:00
fhci-hub.c USB: host: fhci: Remove redundant license text 2017-11-07 15:45:02 +01:00
fhci-mem.c USB: host: fhci: Remove redundant license text 2017-11-07 15:45:02 +01:00
fhci-q.c USB: host: fhci: Remove redundant license text 2017-11-07 15:45:02 +01:00
fhci-sched.c usb: host: use usb_endpoint_maxp instead of usb_maxpacket 2019-04-19 14:23:34 +02:00
fhci-tds.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
fhci.h USB: fhci-hcd: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
fotg210-hcd.c usb: host: fotg210: add missed clk_put calls 2019-11-04 15:53:02 +01:00
fotg210.h USB: Replace zero-length array with flexible-array member 2020-02-23 19:24:51 +01:00
fsl-mph-dr-of.c usb :fsl: Change string format for errata property 2019-07-03 18:52:20 +02:00
imx21-dbg.c usb: host: imx21: create debugfs directory under usb root 2019-11-14 11:14:54 +08:00
imx21-hcd.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
imx21-hcd.h USB: host: imx21: Remove redundant license text 2017-11-07 15:45:02 +01:00
isp116x-hcd.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
isp116x.h
isp1362-hcd.c usb: isp1362-hcd: use devm_platform_ioremap_resource() to simplify code 2019-10-04 14:09:40 +02:00
isp1362.h usb: isp1362: Spelling s/eclusive/exclusive/ 2019-06-18 08:51:28 +02:00
Kconfig usb: exynos: Rename Samsung and Exynos to lowercase 2020-01-09 10:53:38 +01:00
Makefile usb: remove ehci-w90x900 driver 2019-08-10 09:28:28 +02:00
max3421-hcd.c usb/max3421: remove the dummy {un,}map_urb_for_dma methods 2019-08-21 10:07:25 -07:00
ohci-at91.c USB: host: ohci-at91: Remove unused variable regs in at91_stop_hc 2019-10-15 20:01:59 +02:00
ohci-da8xx.c usb: ohci-da8xx: ensure error return on variable error is set 2020-01-08 17:34:18 +01:00
ohci-dbg.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
ohci-exynos.c usb: exynos: Rename Samsung and Exynos to lowercase 2020-01-09 10:53:38 +01:00
ohci-hcd.c Merge 5.3-rc7 into usb-next 2019-09-02 19:31:18 +02:00
ohci-hub.c ohci-hcd: Fix race condition caused by ohci_urb_enqueue() and io_watchdog_func() 2018-02-15 18:43:57 +01:00
ohci-mem.c usb: host: Fix excessive alignment restriction for local memory allocations 2019-06-28 07:57:07 +02:00
ohci-nxp.c usb: ohci-nxp: fix use of integer as pointer 2019-11-04 15:50:38 +01:00
ohci-omap.c usb: add a flag to skip PHY initialization to struct usb_hcd 2018-03-09 09:43:52 -08:00
ohci-pci.c usb: host: ohci-pci: remove useless cast for driver.name 2020-02-19 11:10:27 +01:00
ohci-platform.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ohci-ppc-of.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
ohci-ps3.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
ohci-pxa27x.c usb: host: ohci-pxa27x: Fix and & vs | typo 2019-08-21 09:59:30 -07:00
ohci-q.c usb: ohci: Proper handling of ed_rm_list to handle race condition between usb_kill_urb() and finish_unlinks() 2018-02-15 18:45:34 +01:00
ohci-s3c2410.c usb: ohci-s3c2410: Remove set but not used variable 'hcd' 2019-06-03 15:21:57 +02:00
ohci-sa1111.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
ohci-sm501.c usb/ohci-sm501: remove the HCD_DMA flag 2019-09-03 15:25:52 +02:00
ohci-spear.c USB: ohci-spear: Remove set but not used variable 'ohci' 2019-06-03 15:21:57 +02:00
ohci-st.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ohci-tmio.c usb/ohci-tmio: remove the HCD_DMA flag 2019-09-03 15:26:05 +02:00
ohci.h USB: Replace zero-length array with flexible-array member 2020-02-23 19:24:51 +01:00
oxu210hp-hcd.c usb: host: oxu210hp-hcd: fix gcc warning 2020-01-08 16:58:36 +01:00
pci-quirks.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
pci-quirks.h usb: pci-quirks: Minor cleanup for AMD PLL quirk 2019-07-25 10:40:02 +02:00
r8a66597-hcd.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
r8a66597.h USB: host: Remove redundant license text 2017-11-07 15:45:02 +01:00
sl811_cs.c
sl811-hcd.c usb: host: sl811-hcd: remove useless cast for driver.name 2020-02-19 11:10:27 +01:00
sl811.h
ssb-hcd.c USB: host: Remove redundant license text 2017-11-07 15:45:02 +01:00
u132-hcd.c usb: host: u132-hcd: fix spelling mistake "overcurren" -> "overcurrent" 2019-10-04 14:09:41 +02:00
uhci-debug.c
uhci-grlib.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
uhci-hcd.c USB: drop HCD_LOCAL_MEM flag 2019-06-03 16:00:08 +02:00
uhci-hcd.h usb: uhci: Add clk support to uhci-platform 2018-01-17 15:08:56 +01:00
uhci-hub.c
uhci-pci.c usb: host: uhci-pci: remove useless cast for driver.name 2020-02-19 11:10:27 +01:00
uhci-platform.c usb: add a HCD_DMA flag instead of guestimating DMA capabilities 2019-08-21 10:03:35 -07:00
uhci-q.c USB: remove the URB_NO_FSBR flag 2017-12-12 13:16:07 +01:00
xhci-dbg.c usb: xhci: Cleanup printk debug message for ERST 2017-12-08 17:43:52 +01:00
xhci-dbgcap.c usb: host: Remove call to memset after dma_alloc_coherent 2019-07-25 11:10:54 +02:00
xhci-dbgcap.h usb: xhci: dbc: Add SPDX identifiers to dbc files 2018-05-24 18:03:07 +02:00
xhci-dbgtty.c usb: xhci: dbc: Use GFP_KERNEL instead of GFP_ATOMIC in 'xhci_dbc_alloc_requests()' 2019-09-03 15:49:11 +02:00
xhci-debugfs.c usb: xhci: fix __le32/__le64 accessors in debugfs code 2019-10-28 17:47:08 +01:00
xhci-debugfs.h usb: xhci: remove unused member 'parent' in xhci_regset struct 2019-02-20 20:18:23 +01:00
xhci-ext-caps.c xhci-ext-caps.c: Add missing platform_device_put() on error in xhci_create_intel_xhci_sw_pdev() 2019-10-04 14:37:53 +02:00
xhci-ext-caps.h xhci: Add Intel extended cap / otg phy mux handling 2018-03-22 13:40:10 +01:00
xhci-histb.c usb: host: hisilicon: convert to devm_platform_get_and_ioremap_resource 2020-03-24 12:09:39 +01:00
xhci-hub.c xhci: prevent bus suspend if a roothub port detected a over-current condition 2020-04-21 16:27:38 +02:00
xhci-mem.c xhci: Wait until link state trainsits to U0 after setting USB_SS_PORT_LS_U0 2020-03-12 17:34:49 +01:00
xhci-mtk-sch.c usb: xhci-mtk: supports SSP without external USB3 gen2 hub 2018-09-28 15:04:45 +02:00
xhci-mtk.c usb: mtk-xhci: Do not explicitly set the DMA mask 2019-12-30 20:11:31 +01:00
xhci-mtk.h USB: Replace zero-length array with flexible-array member 2020-02-23 19:24:51 +01:00
xhci-mvebu.c usb: host: xhci: mvebu: add reset on resume quirk 2019-01-30 09:22:35 +01:00
xhci-mvebu.h usb: host: xhci: mvebu: add reset on resume quirk 2019-01-30 09:22:35 +01:00
xhci-pci.c Merge 5.6-rc7 into usb-next 2020-03-23 08:04:08 +01:00
xhci-plat.c usb: host: xhci-plat: keep runtime active when removing host 2020-05-14 13:44:37 +02:00
xhci-plat.h usb: host: xhci-plat: add quirks member into struct xhci_plat_priv 2019-09-03 15:53:11 +02:00
xhci-rcar.c usb: host: xhci-rcar: Use xhci_plat_priv.quirks instead of code settings 2019-09-03 15:53:27 +02:00
xhci-rcar.h usb: host: xhci-rcar: Use xhci_plat_priv.quirks instead of code settings 2019-09-03 15:53:27 +02:00
xhci-ring.c usb: xhci: Fix NULL pointer dereference when enqueuing trbs from urb sg list 2020-05-14 13:44:37 +02:00
xhci-tegra.c usb: xhci-tegra: Add OTG support 2020-03-19 14:18:57 +01:00
xhci-trace.c
xhci-trace.h xhci: Do not open code __print_symbolic() in xhci trace events 2020-03-10 17:47:40 +01:00
xhci.c xhci: Fix handling halted endpoint even if endpoint ring appears empty 2020-04-21 16:27:38 +02:00
xhci.h xhci: Fix handling halted endpoint even if endpoint ring appears empty 2020-04-21 16:27:38 +02:00