Date:   Thu, 18 Aug 2022 15:36:44 +0100
From:   "Alan J. Wylie" <alan@...ie.me.uk>
To:     Christoph Hellwig <hch@....de>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Regression in 5.19.0: USB errors during boot


Apologies for the delay in reporting this: I messed up my first attempt at
bisecting, then I've spent a week going to, enjoying, returning from and
recovering from a music festival.

Up to and including 5.18.18 things are fine. With 5.19.0 (and .1 and .2)  I see
lots of errors and hangs on the USB2 chipset, e.g.

$ grep "usb 9-4" dmesg.5.19.2
[    6.669075] usb 9-4: new full-speed USB device number 2 using ohci-pci
[    6.829087] usb 9-4: device descriptor read/64, error -32
[    7.097094] usb 9-4: device descriptor read/64, error -32
[    7.361087] usb 9-4: new full-speed USB device number 3 using ohci-pci
[    7.521152] usb 9-4: device descriptor read/64, error -32
[    7.789066] usb 9-4: device descriptor read/64, error -32
[    8.081070] usb 9-4: new full-speed USB device number 4 using ohci-pci
[    8.497138] usb 9-4: device not accepting address 4, error -32
[    8.653140] usb 9-4: new full-speed USB device number 5 using ohci-pci
[    9.069141] usb 9-4: device not accepting address 5, error -32
$

$ grep "usb 1-2" dmesg.5.19.2
[    5.917102] usb 1-2: new high-speed USB device number 2 using ehci-pci
[    6.277076] usb 1-2: device descriptor read/64, error -71
[    6.513143] usb 1-2: device descriptor read/64, error -32
[    6.753146] usb 1-2: new high-speed USB device number 3 using ehci-pci
[    6.881143] usb 1-2: device descriptor read/64, error -32
[    7.117144] usb 1-2: device descriptor read/64, error -32
[    7.429141] usb 1-2: new high-speed USB device number 4 using ehci-pci
[    7.845134] usb 1-2: device not accepting address 4, error -32
[    7.977142] usb 1-2: new high-speed USB device number 5 using ehci-pci
[    8.393158] usb 1-2: device not accepting address 5, error -32
$

the USB port is then no longer usable

This is not reproducible on the other chipset (USB3) on this machine,
nor on two other systems. Swapping USB cables doesn't help.

I have bisected it to

$ git bisect bad
78013eaadf696d2105982abb4018fbae394ca08f is the first bad commit
commit 78013eaadf696d2105982abb4018fbae394ca08f
Author: Christoph Hellwig <hch@....de>
Date:   Mon Feb 14 14:11:44 2022 +0100

    x86: remove the IOMMU table infrastructure

however it will not easily revert

I'll be more than happy to assist with any debugging/testing.

$ git revert 78013eaadf696d2105982abb4018fbae394ca08f
Auto-merging arch/x86/include/asm/dma-mapping.h
CONFLICT (content): Merge conflict in arch/x86/include/asm/dma-mapping.h
Auto-merging arch/x86/include/asm/iommu.h
Auto-merging arch/x86/include/asm/xen/swiotlb-xen.h
Auto-merging arch/x86/kernel/Makefile
Auto-merging arch/x86/kernel/pci-dma.c
CONFLICT (content): Merge conflict in arch/x86/kernel/pci-dma.c
Auto-merging arch/x86/kernel/vmlinux.lds.S
Auto-merging drivers/iommu/amd/init.c
Auto-merging drivers/iommu/amd/iommu.c
CONFLICT (content): Merge conflict in drivers/iommu/amd/iommu.c
Auto-merging drivers/iommu/intel/dmar.c
error: could not revert 78013eaadf69... x86: remove the IOMMU table infrastructure

# dmidecode  | grep -A2 "^Base Board"
Base Board Information
     Manufacturer: Gigabyte Technology Co., Ltd.
     Product Name: 970A-DS3P
#

# lspci -nn | grep -i usb
00:12.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]
00:12.2 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]
00:13.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]
00:13.2 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]
00:14.5 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI2 Controller [1002:4399]
00:16.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]
00:16.2 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]
02:00.0 USB controller [0c03]: VIA Technologies, Inc. VL805/806 xHCI USB 3.0 Controller [1106:3483] (rev 01)
#

# lspci -v -s 00:12
00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller (prog-if 10 [OHCI])
	Subsystem: Gigabyte Technology Co., Ltd GA-880GMA-USB3
	Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 18
	Memory at fe50a000 (32-bit, non-prefetchable) [size=4K]
	Kernel driver in use: ohci-pci
				 	Kernel modules: ohci_pci
00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller (prog-if 20 [EHCI])
	Subsystem: Gigabyte Technology Co., Ltd GA-880GMA-USB3
	Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 17
	Memory at fe509000 (32-bit, non-prefetchable) [size=256]
	Capabilities: [c0] Power Management version 2
	Capabilities: [e4] Debug port: BAR=1 offset=00e0
	Kernel driver in use: ehci-pci
	Kernel modules: ehci_pci
#

# lsusb
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 009 Device 002: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port / Mobile Action MA-8910P
Bus 009 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 002: ID 03f0:0317 HP, Inc LaserJet 1200
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 04e8:6860 Samsung Electronics Co., Ltd Galaxy A5 (MTP)
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
#

$ git bisect log
git bisect start
# good: [4b0986a3613c92f4ec1bdc7f60ec66fea135991f] Linux 5.18
git bisect good 4b0986a3613c92f4ec1bdc7f60ec66fea135991f
# good: [07e0b709cab7dc987b5071443789865e20481119] Linux 5.18.18
git bisect good 07e0b709cab7dc987b5071443789865e20481119
# bad: [3d7cb6b04c3f3115719235cc6866b10326de34cd] Linux 5.19
git bisect bad 3d7cb6b04c3f3115719235cc6866b10326de34cd
# bad: [c011dd537ffe47462051930413fed07dbdc80313] Merge tag 'arm-soc-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
git bisect bad c011dd537ffe47462051930413fed07dbdc80313
# good: [7e062cda7d90543ac8c7700fc7c5527d0c0f22ad] Merge tag 'net-next-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
git bisect good 7e062cda7d90543ac8c7700fc7c5527d0c0f22ad
# good: [f8122500a039abeabfff41b0ad8b6a2c94c1107d] Merge branch 'etnaviv/next' of https://git.pengutronix.de/git/lst/linux into drm-next
git bisect good f8122500a039abeabfff41b0ad8b6a2c94c1107d
# good: [2518f226c60d8e04d18ba4295500a5b0b8ac7659] Merge tag 'drm-next-2022-05-25' of git://anongit.freedesktop.org/drm/drm
git bisect good 2518f226c60d8e04d18ba4295500a5b0b8ac7659
# good: [f7a344468105ef8c54086dfdc800e6f5a8417d3e] ASoC: max98090: Move check for invalid values before casting in max98090_put_enab_tlv()
git bisect good f7a344468105ef8c54086dfdc800e6f5a8417d3e
# good: [fbe86daca0ba878b04fa241b85e26e54d17d4229] Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
git bisect good fbe86daca0ba878b04fa241b85e26e54d17d4229
# good: [709c8632597c3276cd21324b0256628f1a7fd4df] xfs: rework deferred attribute operation setup
git bisect good 709c8632597c3276cd21324b0256628f1a7fd4df
# bad: [babf0bb978e3c9fce6c4eba6b744c8754fd43d8e] Merge tag 'xfs-5.19-for-linus' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
git bisect bad babf0bb978e3c9fce6c4eba6b744c8754fd43d8e
# bad: [8b728edc5be161799434cc17e1279db2f8eabe29] Merge tag 'fs_for_v5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
git bisect bad 8b728edc5be161799434cc17e1279db2f8eabe29
# bad: [3f70356edf5611c28a68d8d5a9c2b442c9eb81e6] swiotlb: merge swiotlb-xen initialization into swiotlb
git bisect bad 3f70356edf5611c28a68d8d5a9c2b442c9eb81e6
# good: [f39f8d0eb081407e470396fd4cc376c526d13066] MIPS/octeon: use swiotlb_init instead of open coding it
git bisect good f39f8d0eb081407e470396fd4cc376c526d13066
# bad: [c6af2aa9ffc9763826607bc2664ef3ea4475ed18] swiotlb: make the swiotlb_init interface more useful
git bisect bad c6af2aa9ffc9763826607bc2664ef3ea4475ed18
# bad: [a3e230926708125205ffd06d3dc2175a8263ae7e] x86: centralize setting SWIOTLB_FORCE when guest memory encryption is enabled
git bisect bad a3e230926708125205ffd06d3dc2175a8263ae7e
# bad: [78013eaadf696d2105982abb4018fbae394ca08f] x86: remove the IOMMU table infrastructure
git bisect bad 78013eaadf696d2105982abb4018fbae394ca08f
# first bad commit: [78013eaadf696d2105982abb4018fbae394ca08f] x86: remove the IOMMU table infrastructure
$


-- 
Alan J. Wylie                                          https://www.wylie.me.uk/

Dance like no-one's watching. / Encrypt like everyone is.
Security is inversely proportional to convenience

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