Peter Chen 95cd7dc47a usb: cdns3: gadget: prev_req->trb is NULL for ep0 ... And there are no multiple TRBs on EP0 and WA1 workaround, so it doesn't need to change TRB for EP0. It fixes below oops. configfs-gadget gadget: high-speed config #1: b android_work: sent uevent USB_STATE=CONFIGURED Unable to handle kernel read from unreadable memory at virtual address 0000000000000008 Mem abort info: android_work: sent uevent USB_STATE=DISCONNECTED ESR = 0x96000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 Data abort info: ISV = 0, ISS = 0x00000004 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=00000008b5bb7000 [0000000000000008] pgd=0000000000000000 Internal error: Oops: 96000004 [#1] PREEMPT SMP Modules linked in: CPU: 2 PID: 430 Comm: HwBinder:401_1 Not tainted 5.4.24-06071-g6fa8921409c1-dirty #77 Hardware name: Freescale i.MX8QXP MEK (DT) pstate: 60400085 (nZCv daIf +PAN -UAO) pc : cdns3_gadget_ep_dequeue+0x1d4/0x270 lr : cdns3_gadget_ep_dequeue+0x48/0x270 sp : ffff800012763ba0 x29: ffff800012763ba0 x28: ffff00082c653c00 x27: 0000000000000000 x26: ffff000068fa7b00 x25: ffff0000699b2000 x24: ffff00082c6ac000 x23: ffff000834f0a480 x22: ffff000834e87b9c x21: 0000000000000000 x20: ffff000834e87800 x19: ffff000069eddc00 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000001 x11: ffff80001180fbe8 x10: 0000000000000001 x9 : ffff800012101558 x8 : 0000000000000001 x7 : 0000000000000006 x6 : ffff000835d9c668 x5 : ffff000834f0a4c8 x4 : 0000000096000000 x3 : 0000000000001810 x2 : 0000000000000000 x1 : ffff800024bd001c x0 : 0000000000000001 Call trace: cdns3_gadget_ep_dequeue+0x1d4/0x270 usb_ep_dequeue+0x34/0xf8 composite_dev_cleanup+0x154/0x170 configfs_composite_unbind+0x6c/0xa8 usb_gadget_remove_driver+0x44/0x70 usb_gadget_unregister_driver+0x74/0xe0 unregister_gadget+0x28/0x58 gadget_dev_desc_UDC_store+0x80/0x110 configfs_write_file+0x1e0/0x2a0 __vfs_write+0x48/0x90 vfs_write+0xe4/0x1c8 ksys_write+0x78/0x100 __arm64_sys_write+0x24/0x30 el0_svc_common.constprop.0+0x74/0x168 el0_svc_handler+0x34/0xa0 el0_svc+0x8/0xc Code: 52830203 b9407660 f94042e4 11000400 (b9400841) ---[ end trace 1574516e4c1772ca ]--- Kernel panic - not syncing: Fatal exception SMP: stopping secondary CPUs Kernel Offset: disabled CPU features: 0x0002,20002008 Memory Limit: none Rebooting in 5 seconds.. Fixes: f616c3bda4 ("usb: cdns3: Fix dequeue implementation") Cc: stable <stable@vger.kernel.org> Signed-off-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>		2020-05-09 11:05:08 +03:00
..
cdns3-imx.c	usb: cdns3: add NXP imx8qm glue layer	2020-01-15 10:39:22 +01:00
cdns3-pci-wrap.c	usb: cdns3: fix spelling mistake "wrapperr" -> "wrapper"	2020-03-19 15:14:48 +01:00
cdns3-ti.c	usb: cdns3: make signed 1 bit bitfields unsigned	2020-03-26 15:05:44 +01:00
core.c	usb: roles: Provide the switch drivers handle to the switch in the API	2020-03-04 11:12:50 +01:00
core.h
debug.h	usb: cdns3: fix spelling mistake and rework grammar in text	2020-01-24 09:41:27 +01:00
drd.c
drd.h
ep0.c	usb:cdns3: Fix for CV CH9 running with g_zero driver.	2019-10-07 12:56:26 +02:00
gadget-export.h
gadget.c	usb: cdns3: gadget: prev_req->trb is NULL for ep0	2020-05-09 11:05:08 +03:00
gadget.h	usb: cdns3: make signed 1 bit bitfields unsigned	2020-03-26 15:05:44 +01:00
host-export.h	usb: cdns3: include host-export,h for cdns3_host_init	2019-10-27 08:58:44 +02:00
host.c	usb: cdns3: include host-export,h for cdns3_host_init	2019-10-27 08:58:44 +02:00
Kconfig	usb: cdns3: add NXP imx8qm glue layer	2020-01-15 10:39:22 +01:00
Makefile	usb: cdns3: add NXP imx8qm glue layer	2020-01-15 10:39:22 +01:00
trace.c
trace.h	usb: cdns3: Add streams support to cadence USB3 DRD driver	2020-01-15 10:39:22 +01:00