Kernel update breaks USB device enumeration

[Christopher St.Peters]

System background information:
I use multiple Raspberry Pi 3/3b+ computers as UART logging stations for up to 15 mixed FTDI 3.3v or 1.8v USB to serial connected devices connected via powered USB 2.0 hubs. These systems have been stable with no issues for about 6 months.

A recent kernel update causes the devices to fail to enumerate at boot time, and causes the entire USB bus to fail, leaving the system unconnected to Ethernet and unable to talk to peripherals such as keyboard, mouse, etc. These systems are in a closed lab environment and do not get updated frequently because they are always in use.

I have verified the kernel is the issue by comparing:
 - My un-updated working system
 - Same system with updates applied while kernel held back using apt-mark
 - Same system with kernel updated

This issue only happens once the kernel is updated. I have saved the entire filesystem in all three states, including logs, if more info is needed after this initial report. The logs appear to show a power issue, but again, these are powered USB hubs with more than enough power supplied to the serial cables connected, and they worked fine before the kernel update. I have also verified this problem exists no matter which USB hubs I use, I have used Tripp-Lite, Plugable, Belkin, and a couple other manufacturers with the same results.

Last known good kernel without this issue:
Linux qa-pi-2 4.14.98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l GNU/Linux

Current kernel that shows this issue:
Linux qa-pi-2 4.19.66-v7+ #1253 SMP Thu Aug 15 11:49:46 BST 2019 armv7l GNU/Linux
I can confirm this bug still exists in Buster as well.

Boot time syslog entries on failed system with kernel update applied:

Sep 20 11:19:33 qa-pi-2 kernel: ftdi_sio ttyUSB5: ftdi_set_termios FAILED to set databits/stopbits/parity
Sep 20 11:19:33 qa-pi-2 kernel: ftdi_sio ttyUSB3: ftdi_set_termios FAILED to set databits/stopbits/parity
Sep 20 11:19:34 qa-pi-2 kernel: ftdi_sio ttyUSB5: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:34 qa-pi-2 kernel: ftdi_sio ttyUSB3: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:38 qa-pi-2 kernel: ftdi_sio ttyUSB1: ftdi_set_termios FAILED to set databits/stopbits/parity
Sep 20 11:19:39 qa-pi-2 kernel: ftdi_sio ttyUSB5: failed to set flow control: -110
Sep 20 11:19:39 qa-pi-2 kernel: ftdi_sio ttyUSB1: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:39 qa-pi-2 kernel: ftdi_sio ttyUSB0: ftdi_set_termios FAILED to set databits/stopbits/parity
Sep 20 11:19:39 qa-pi-2 kernel: ftdi_sio ttyUSB3: failed to set flow control: -110
Sep 20 11:19:40 qa-pi-2 kernel: ftdi_sio ttyUSB8: ftdi_set_termios FAILED to set databits/stopbits/parity
Sep 20 11:19:40 qa-pi-2 kernel: ftdi_sio ttyUSB0: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:41 qa-pi-2 kernel: ftdi_sio ttyUSB8: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:41 qa-pi-2 kernel: ftdi_sio ttyUSB6: ftdi_set_termios FAILED to set databits/stopbits/parity
Sep 20 11:19:42 qa-pi-2 kernel: ftdi_sio ttyUSB6: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:42 qa-pi-2 kernel: ftdi_sio ttyUSB4: ftdi_set_termios FAILED to set databits/stopbits/parity
Sep 20 11:19:43 qa-pi-2 kernel: ftdi_sio ttyUSB4: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:43 qa-pi-2 kernel: ftdi_sio ttyUSB7: ftdi_set_termios FAILED to set databits/stopbits/parity
Sep 20 11:19:44 qa-pi-2 kernel: ftdi_sio ttyUSB1: failed to set flow control: -110
Sep 20 11:19:44 qa-pi-2 kernel: ftdi_sio ttyUSB9: ftdi_set_termios FAILED to set databits/stopbits/parity
Sep 20 11:19:44 qa-pi-2 kernel: ftdi_sio ttyUSB7: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:45 qa-pi-2 kernel: ftdi_sio ttyUSB5: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:45 qa-pi-2 kernel: ftdi_sio ttyUSB0: failed to set flow control: -110
Sep 20 11:19:45 qa-pi-2 kernel: ftdi_sio ttyUSB9: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:45 qa-pi-2 kernel: ftdi_sio ttyUSB2: ftdi_set_termios FAILED to set databits/stopbits/parity
Sep 20 11:19:46 qa-pi-2 kernel: ftdi_sio ttyUSB3: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:46 qa-pi-2 kernel: ftdi_sio ttyUSB8: failed to set flow control: -110
Sep 20 11:19:46 qa-pi-2 kernel: ftdi_sio ttyUSB2: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:46 qa-pi-2 kernel: ftdi_sio ttyUSB10: ftdi_set_termios FAILED to set databits/stopbits/parity
Sep 20 11:19:47 qa-pi-2 kernel: ftdi_sio ttyUSB6: failed to set flow control: -110
Sep 20 11:19:47 qa-pi-2 kernel: ftdi_sio ttyUSB10: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:48 qa-pi-2 kernel: ftdi_sio ttyUSB4: failed to set flow control: -110
Sep 20 11:19:49 qa-pi-2 kernel: ftdi_sio ttyUSB7: failed to set flow control: -110
Sep 20 11:19:50 qa-pi-2 kernel: ftdi_sio ttyUSB5: failed to set flow control: -110
Sep 20 11:19:50 qa-pi-2 kernel: ftdi_sio ttyUSB1: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:50 qa-pi-2 kernel: ftdi_sio ttyUSB9: failed to set flow control: -110
Sep 20 11:19:51 qa-pi-2 kernel: ftdi_sio ttyUSB3: failed to set flow control: -110
Sep 20 11:19:51 qa-pi-2 kernel: ftdi_sio ttyUSB0: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:51 qa-pi-2 kernel: ftdi_sio ttyUSB2: failed to set flow control: -110
Sep 20 11:19:52 qa-pi-2 kernel: ftdi_sio ttyUSB8: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:52 qa-pi-2 kernel: ftdi_sio ttyUSB10: failed to set flow control: -110
Sep 20 11:19:53 qa-pi-2 kernel: ftdi_sio ttyUSB6: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:54 qa-pi-2 kernel: ftdi_sio ttyUSB4: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:55 qa-pi-2 kernel: ftdi_sio ttyUSB1: failed to set flow control: -110
Sep 20 11:19:55 qa-pi-2 kernel: ftdi_sio ttyUSB7: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:56 qa-pi-2 kernel: ftdi_sio ttyUSB0: failed to set flow control: -110
Sep 20 11:19:56 qa-pi-2 kernel: ftdi_sio ttyUSB9: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:57 qa-pi-2 kernel: ftdi_sio ttyUSB8: failed to set flow control: -110
Sep 20 11:19:57 qa-pi-2 kernel: ftdi_sio ttyUSB2: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:58 qa-pi-2 kernel: ftdi_sio ttyUSB6: failed to set flow control: -110
Sep 20 11:19:58 qa-pi-2 kernel: ftdi_sio ttyUSB10: ftdi_set_termios urb failed to set baudrate
Sep 20 11:19:59 qa-pi-2 kernel: ftdi_sio ttyUSB4: failed to set flow control: -110
Sep 20 11:20:00 qa-pi-2 kernel: ftdi_sio ttyUSB5: failed to get modem status: -110
Sep 20 11:20:00 qa-pi-2 kernel: ftdi_sio ttyUSB7: failed to set flow control: -110
Sep 20 11:20:01 qa-pi-2 kernel: ftdi_sio ttyUSB3: failed to get modem status: -110
Sep 20 11:20:01 qa-pi-2 kernel: ftdi_sio ttyUSB9: failed to set flow control: -110
Sep 20 11:20:02 qa-pi-2 kernel: ftdi_sio ttyUSB2: failed to set flow control: -110
Sep 20 11:20:04 qa-pi-2 kernel: ftdi_sio ttyUSB10: failed to set flow control: -110
Sep 20 11:20:05 qa-pi-2 kernel: ftdi_sio ttyUSB5: error from flowcontrol urb
Sep 20 11:20:05 qa-pi-2 kernel: ftdi_sio ttyUSB1: failed to get modem status: -110
Sep 20 11:20:06 qa-pi-2 kernel: ftdi_sio ttyUSB3: error from flowcontrol urb
Sep 20 11:20:06 qa-pi-2 kernel: ftdi_sio ttyUSB0: failed to get modem status: -110
Sep 20 11:20:07 qa-pi-2 kernel: ftdi_sio ttyUSB8: failed to get modem status: -110
Sep 20 11:20:08 qa-pi-2 kernel: ftdi_sio ttyUSB6: failed to get modem status: -110
Sep 20 11:20:09 qa-pi-2 kernel: ftdi_sio ttyUSB4: failed to get modem status: -110
Sep 20 11:20:10 qa-pi-2 kernel: ftdi_sio ttyUSB1: error from flowcontrol urb
Sep 20 11:20:10 qa-pi-2 kernel: ftdi_sio ttyUSB7: failed to get modem status: -110
Sep 20 11:20:11 qa-pi-2 kernel: ftdi_sio ttyUSB0: error from flowcontrol urb
Sep 20 11:20:11 qa-pi-2 kernel: ftdi_sio ttyUSB9: failed to get modem status: -110
Sep 20 11:20:12 qa-pi-2 kernel: ftdi_sio ttyUSB8: error from flowcontrol urb
Sep 20 11:20:13 qa-pi-2 kernel: ftdi_sio ttyUSB2: failed to get modem status: -110
Sep 20 11:20:13 qa-pi-2 kernel: ftdi_sio ttyUSB6: error from flowcontrol urb
Sep 20 11:20:14 qa-pi-2 kernel: ftdi_sio ttyUSB10: failed to get modem status: -110
Sep 20 11:20:14 qa-pi-2 kernel: ftdi_sio ttyUSB4: error from flowcontrol urb
Sep 20 11:20:15 qa-pi-2 kernel: ftdi_sio ttyUSB7: error from flowcontrol urb
Sep 20 11:20:16 qa-pi-2 kernel: ftdi_sio ttyUSB9: error from flowcontrol urb
Sep 20 11:20:18 qa-pi-2 kernel: ftdi_sio ttyUSB2: error from flowcontrol urb
Sep 20 11:20:19 qa-pi-2 kernel: ftdi_sio ttyUSB10: error from flowcontrol urb
Sep 20 11:23:36 qa-pi-2 kernel: Under-voltage detected! (0x00050005)
Sep 20 11:23:38 qa-pi-2 kernel: usb 1-1.2.7: new high-speed USB device number 14 using dwc_otg
Sep 20 11:23:38 qa-pi-2 kernel: usb 1-1.2.7: New USB device found, idVendor=1a40, idProduct=0201, bcdDevice= 1.00
Sep 20 11:23:38 qa-pi-2 kernel: usb 1-1.2.7: New USB device strings: Mfr=0, Product=1, SerialNumber=0
Sep 20 11:23:38 qa-pi-2 kernel: usb 1-1.2.7: Product: USB 2.0 Hub [MTT]
Sep 20 11:23:38 qa-pi-2 kernel: hub 1-1.2.7:1.0: USB hub found
Sep 20 11:23:38 qa-pi-2 kernel: hub 1-1.2.7:1.0: 7 ports detected
Sep 20 11:23:42 qa-pi-2 kernel: Voltage normalised (0x00000000)
Sep 20 11:23:42 qa-pi-2 kernel: usb 1-1.2.1: new full-speed USB device number 15 using dwc_otg
Sep 20 11:23:42 qa-pi-2 kernel: usb 1-1.2.1: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
Sep 20 11:23:42 qa-pi-2 kernel: usb 1-1.2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Sep 20 11:23:42 qa-pi-2 kernel: usb 1-1.2.1: Product: TTL232R-3V3
Sep 20 11:23:42 qa-pi-2 kernel: usb 1-1.2.1: Manufacturer: FTDI
Sep 20 11:23:42 qa-pi-2 kernel: usb 1-1.2.1: SerialNumber: FT9S9RYG
Sep 20 11:23:42 qa-pi-2 mtp-probe[1319]: checking bus 1, device 15: "/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.1"
Sep 20 11:23:42 qa-pi-2 mtp-probe[1319]: bus: 1, device: 15 was not an MTP device
Sep 20 11:23:43 qa-pi-2 kernel: usbcore: registered new interface driver usbserial_generic
Sep 20 11:23:43 qa-pi-2 kernel: usbserial: USB Serial support registered for generic
Sep 20 11:23:43 qa-pi-2 kernel: usbcore: registered new interface driver ftdi_sio
Sep 20 11:23:43 qa-pi-2 kernel: usbserial: USB Serial support registered for FTDI USB Serial Device
Sep 20 11:23:43 qa-pi-2 kernel: ftdi_sio 1-1.2.1:1.0: FTDI USB Serial Device converter detected
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.1: Detected FT232RL
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.1: FTDI USB Serial Device converter now attached to ttyUSB0
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.2: new full-speed USB device number 16 using dwc_otg
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.2: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.2: Product: TTL232R-3V3
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.2: Manufacturer: FTDI
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.2: SerialNumber: FTAD2EDY
Sep 20 11:23:43 qa-pi-2 kernel: ftdi_sio 1-1.2.2:1.0: FTDI USB Serial Device converter detected
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.2: Detected FT232RL
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.2: FTDI USB Serial Device converter now attached to ttyUSB1
Sep 20 11:23:43 qa-pi-2 mtp-probe[1326]: checking bus 1, device 16: "/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.2"
Sep 20 11:23:43 qa-pi-2 mtp-probe[1326]: bus: 1, device: 16 was not an MTP device
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.3: new full-speed USB device number 17 using dwc_otg
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.3: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.3: Product: TTL232R-3V3
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.3: Manufacturer: FTDI
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.3: SerialNumber: FTAD116O
Sep 20 11:23:43 qa-pi-2 kernel: ftdi_sio 1-1.2.3:1.0: FTDI USB Serial Device converter detected
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.3: Detected FT232RL
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.3: FTDI USB Serial Device converter now attached to ttyUSB2
Sep 20 11:23:43 qa-pi-2 mtp-probe[1330]: checking bus 1, device 17: "/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.3"
Sep 20 11:23:43 qa-pi-2 mtp-probe[1330]: bus: 1, device: 17 was not an MTP device
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.4: new full-speed USB device number 18 using dwc_otg
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.4: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.4: Product: TTL232R-3V3
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.4: Manufacturer: FTDI
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.4: SerialNumber: FTAPR37N
Sep 20 11:23:43 qa-pi-2 kernel: ftdi_sio 1-1.2.4:1.0: FTDI USB Serial Device converter detected
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.4: Detected FT232RL
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.4: FTDI USB Serial Device converter now attached to ttyUSB3
Sep 20 11:23:43 qa-pi-2 mtp-probe[1334]: checking bus 1, device 18: "/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.4"
Sep 20 11:23:43 qa-pi-2 mtp-probe[1334]: bus: 1, device: 18 was not an MTP device
Sep 20 11:23:43 qa-pi-2 kernel: usb 1-1.2.5: new full-speed USB device number 19 using dwc_otg
Sep 20 11:23:44 qa-pi-2 kernel: usb 1-1.2.5: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
Sep 20 11:23:44 qa-pi-2 kernel: usb 1-1.2.5: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Sep 20 11:23:44 qa-pi-2 kernel: usb 1-1.2.5: Product: TTL232R-3V3
Sep 20 11:23:44 qa-pi-2 kernel: usb 1-1.2.5: Manufacturer: FTDI
Sep 20 11:23:44 qa-pi-2 kernel: usb 1-1.2.5: SerialNumber: FTAPR276
Sep 20 11:23:44 qa-pi-2 kernel: ftdi_sio 1-1.2.5:1.0: FTDI USB Serial Device converter detected
Sep 20 11:23:44 qa-pi-2 kernel: usb 1-1.2.5: Detected FT232RL
Sep 20 11:23:44 qa-pi-2 kernel: ERROR::assign_and_init_hc:1408: assign_and_init_hc: Failed to allocate memory to handle non-dword aligned buffer case

Sep 20 11:23:45 qa-pi-2 kernel: usb 1-1.4.7: new high-speed USB device number 20 using dwc_otg
Sep 20 11:23:45 qa-pi-2 kernel: usb 1-1.4.7: New USB device found, idVendor=1a40, idProduct=0201, bcdDevice= 1.00
Sep 20 11:23:45 qa-pi-2 kernel: usb 1-1.4.7: New USB device strings: Mfr=0, Product=1, SerialNumber=0
Sep 20 11:23:45 qa-pi-2 kernel: usb 1-1.4.7: Product: USB 2.0 Hub [MTT]
Sep 20 11:23:45 qa-pi-2 kernel: hub 1-1.4.7:1.0: USB hub found
Sep 20 11:23:45 qa-pi-2 kernel: hub 1-1.4.7:1.0: 7 ports detected
Sep 20 11:23:45 qa-pi-2 kernel: ERROR::assign_and_init_hc:1408: assign_and_init_hc: Failed to allocate memory to handle non-dword aligned buffer case

Sep 20 11:23:49 qa-pi-2 kernel: ftdi_sio ttyUSB4: Unable to read latency timer: -110
Sep 20 11:23:50 qa-pi-2 kernel: hub 1-1.4.7:1.0: config failed, can't get hub status (err -5)
Sep 20 11:23:50 qa-pi-2 kernel: usb 1-1.4.1: new full-speed USB device number 21 using dwc_otg
Sep 20 11:23:51 qa-pi-2 kernel: usb 1-1.4.1: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
Sep 20 11:23:51 qa-pi-2 kernel: usb 1-1.4.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Sep 20 11:23:51 qa-pi-2 kernel: usb 1-1.4.1: Product: TTL232R-3V3
Sep 20 11:23:51 qa-pi-2 kernel: usb 1-1.4.1: Manufacturer: FTDI
Sep 20 11:23:51 qa-pi-2 kernel: usb 1-1.4.1: SerialNumber: FTAPPXER
Sep 20 11:23:51 qa-pi-2 kernel: ftdi_sio 1-1.4.1:1.0: FTDI USB Serial Device converter detected
Sep 20 11:23:51 qa-pi-2 kernel: usb 1-1.4.1: Detected FT232RL
Sep 20 11:23:51 qa-pi-2 kernel: ERROR::assign_and_init_hc:1408: assign_and_init_hc: Failed to allocate memory to handle non-dword aligned buffer case

Sep 20 11:23:54 qa-pi-2 kernel: ftdi_sio ttyUSB4: Unable to write latency timer: -110
Sep 20 11:23:54 qa-pi-2 kernel: usb 1-1.2.5: FTDI USB Serial Device converter now attached to ttyUSB4
Sep 20 11:23:54 qa-pi-2 mtp-probe[1361]: checking bus 1, device 19: "/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.5"
Sep 20 11:23:54 qa-pi-2 mtp-probe[1361]: bus: 1, device: 19 was not an MTP device
Sep 20 11:23:54 qa-pi-2 kernel: usb 1-1.2.6: new full-speed USB device number 22 using dwc_otg
Sep 20 11:23:54 qa-pi-2 kernel: usb 1-1.2.6: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
Sep 20 11:23:54 qa-pi-2 kernel: usb 1-1.2.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Sep 20 11:23:54 qa-pi-2 kernel: usb 1-1.2.6: Product: TTL232R-3V3
Sep 20 11:23:54 qa-pi-2 kernel: usb 1-1.2.6: Manufacturer: FTDI
Sep 20 11:23:54 qa-pi-2 kernel: usb 1-1.2.6: SerialNumber: FTAPQYLM
Sep 20 11:23:54 qa-pi-2 kernel: ftdi_sio 1-1.2.6:1.0: FTDI USB Serial Device converter detected
Sep 20 11:23:54 qa-pi-2 kernel: usb 1-1.2.6: Detected FT232RL
Sep 20 11:23:54 qa-pi-2 kernel: ERROR::assign_and_init_hc:1408: assign_and_init_hc: Failed to allocate memory to handle non-dword aligned buffer case

Sep 20 11:23:56 qa-pi-2 kernel: ftdi_sio ttyUSB5: Unable to read latency timer: -110
Sep 20 11:23:59 qa-pi-2 kernel: ftdi_sio ttyUSB6: Unable to read latency timer: -110
Sep 20 11:24:01 qa-pi-2 kernel: ftdi_sio ttyUSB5: Unable to write latency timer: -110
Sep 20 11:24:01 qa-pi-2 kernel: usb 1-1.4.1: FTDI USB Serial Device converter now attached to ttyUSB5
Sep 20 11:24:01 qa-pi-2 mtp-probe[1372]: checking bus 1, device 21: "/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.4/1-1.4.1"
Sep 20 11:24:01 qa-pi-2 mtp-probe[1372]: bus: 1, device: 21 was not an MTP device
Sep 20 11:24:03 qa-pi-2 kernel: usb 1-1.4.2: new full-speed USB device number 23 using dwc_otg
Sep 20 11:24:04 qa-pi-2 kernel: ftdi_sio ttyUSB6: Unable to write latency timer: -110
Sep 20 11:24:04 qa-pi-2 kernel: usb 1-1.2.6: FTDI USB Serial Device converter now attached to ttyUSB6
Sep 20 11:24:04 qa-pi-2 mtp-probe[1383]: checking bus 1, device 22: "/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.6"
Sep 20 11:24:04 qa-pi-2 mtp-probe[1383]: bus: 1, device: 22 was not an MTP device
Sep 20 11:24:07 qa-pi-2 kernel: usb 1-1.4.2: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
Sep 20 11:24:07 qa-pi-2 kernel: usb 1-1.4.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Sep 20 11:24:07 qa-pi-2 kernel: usb 1-1.4.2: Product: TTL232R-3V3
Sep 20 11:24:07 qa-pi-2 kernel: usb 1-1.4.2: Manufacturer: FTDI
Sep 20 11:24:07 qa-pi-2 kernel: usb 1-1.4.2: SerialNumber: FTAPQYID
Sep 20 11:24:08 qa-pi-2 kernel: ftdi_sio 1-1.4.2:1.0: FTDI USB Serial Device converter detected
Sep 20 11:24:08 qa-pi-2 kernel: usb 1-1.4.2: Detected FT232RL
Sep 20 11:24:08 qa-pi-2 kernel: ERROR::assign_and_init_hc:1408: assign_and_init_hc: Failed to allocate memory to handle non-dword aligned buffer case

Sep 20 11:24:13 qa-pi-2 kernel: ftdi_sio ttyUSB7: Unable to read latency timer: -110
Sep 20 11:24:14 qa-pi-2 kernel: smsc95xx 1-1.1:1.0 enxb827eb27a73c: Failed to read reg index 0x00000114: -110
Sep 20 11:24:14 qa-pi-2 kernel: smsc95xx 1-1.1:1.0 enxb827eb27a73c: Error reading MII_ACCESS
Sep 20 11:24:14 qa-pi-2 kernel: smsc95xx 1-1.1:1.0 enxb827eb27a73c: MII is busy in smsc95xx_mdio_read
Sep 20 11:24:14 qa-pi-2 kernel: smsc95xx 1-1.1:1.0 enxb827eb27a73c: Failed to read MII_BMSR
Sep 20 11:24:18 qa-pi-2 kernel: ftdi_sio ttyUSB7: Unable to write latency timer: -110
Sep 20 11:24:18 qa-pi-2 kernel: usb 1-1.4.2: FTDI USB Serial Device converter now attached to ttyUSB7
Sep 20 11:24:18 qa-pi-2 mtp-probe[1400]: checking bus 1, device 23: "/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.4/1-1.4.2"
Sep 20 11:24:18 qa-pi-2 mtp-probe[1400]: bus: 1, device: 23 was not an MTP device

[Christopher St.Peters (saint0192)]

I guess this is where bugs go to be ignored. Awesome.