Marek Szyprowski 3120aac6d0 usb: dwc2: gadget: don't reset gadget's driver->bus ... UDC driver should not touch gadget's driver internals, especially it should not reset driver->bus. This wasn't harmful so far, but since commit fc274c1e99 ("USB: gadget: Add a new bus for gadgets") gadget subsystem got it's own bus and messing with ->bus triggers the following NULL pointer dereference: dwc2 12480000.hsotg: bound driver g_ether 8<--- cut here --- Unable to handle kernel NULL pointer dereference at virtual address 00000000 [00000000] *pgd=00000000 Internal error: Oops: 5 [#1] SMP ARM Modules linked in: ... CPU: 0 PID: 620 Comm: modprobe Not tainted 5.18.0-rc5-next-20220504 #11862 Hardware name: Samsung Exynos (Flattened Device Tree) PC is at module_add_driver+0x44/0xe8 LR is at sysfs_do_create_link_sd+0x84/0xe0 ... Process modprobe (pid: 620, stack limit = 0x(ptrval)) ... module_add_driver from bus_add_driver+0xf4/0x1e4 bus_add_driver from driver_register+0x78/0x10c driver_register from usb_gadget_register_driver_owner+0x40/0xb4 usb_gadget_register_driver_owner from do_one_initcall+0x44/0x1e0 do_one_initcall from do_init_module+0x44/0x1c8 do_init_module from load_module+0x19b8/0x1b9c load_module from sys_finit_module+0xdc/0xfc sys_finit_module from ret_fast_syscall+0x0/0x54 Exception stack(0xf1771fa8 to 0xf1771ff0) ... dwc2 12480000.hsotg: new device is high-speed ---[ end trace 0000000000000000 ]--- Fix this by removing driver->bus entry reset. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Link: https://lore.kernel.org/r/20220505104618.22729-1-m.szyprowski@samsung.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-05-05 21:52:16 +02:00
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Kconfig	usb: dwc2: override PHY input signals with usb role switch support	2020-10-02 13:29:13 +03:00
Makefile	usb: dwc2: override PHY input signals with usb role switch support	2020-10-02 13:29:13 +03:00
core.c	USB: dwc2: Add OTG support for Ingenic SoCs.	2022-04-21 19:22:00 +02:00
core.h	USB: dwc2: Add OTG support for Ingenic SoCs.	2022-04-21 19:22:00 +02:00
core_intr.c	usb: dwc2: Skip clock gating on Samsung SoCs	2021-07-21 09:50:27 +02:00
debug.h	USB: dwc2: Use the correct style for SPDX License Identifier	2020-05-05 10:58:50 +03:00
debugfs.c	usb: dwc2: add otg_rev and otg_caps information for gadget driver	2021-10-25 09:20:26 +02:00
drd.c	usb: dwc2: drd: fix soft connect when gadget is unconfigured	2022-02-17 16:10:21 +01:00
gadget.c	usb: dwc2: gadget: don't reset gadget's driver->bus	2022-05-05 21:52:16 +02:00
hcd.c	usb: dwc2: do not gate off the hardware if it does not support clock gating	2022-01-06 15:27:53 +01:00
hcd.h	USB: dwc2: Use the correct style for SPDX License Identifier	2020-05-05 10:58:50 +03:00
hcd_ddma.c	usb: dwc2: Modify dwc2_readl/writel functions prototype	2018-07-30 10:39:16 +03:00
hcd_intr.c	usb: dwc2: Make "trimming xfer length" a debug message	2021-01-26 18:42:15 +01:00
hcd_queue.c	usb: dwc2: hcd_queue: Fix use of floating point literal	2021-11-17 15:03:34 +01:00
hw.h	usb: dwc2: Update enter and exit partial power down functions	2021-04-09 15:16:38 +02:00
params.c	USB: dwc2: Add OTG support for Ingenic SoCs.	2022-04-21 19:22:00 +02:00
pci.c	usb: dwc2: pci: Fix possible copy/paste issue	2021-05-27 09:45:27 +02:00
platform.c	Linux 5.16-rc6	2021-12-20 09:58:10 +01:00