unipi-kernel-modules-dkms does not generate modules on upgrade

Achilleas Kotsis

Initial installation of unipi-kernel-modules-dkms or replacing unipi-kernel-modules works. Upgrading unipi-kernel-modules-dkms to a newer version doesn't work.

Using raspbian and packages from https://repo.unipi.technology/debian. Happens on both stretch and buster.

martin_triska

Hello @Achilleas-Kotsis,

the issue is caused by kernel-headers version mismatch because one of the kernel versions has been "stashed" by the author. Therefore, the apt versioning got a little confused by this.

Please make sure you have the latest all the related packages - kernel, headers, unipi-kernel-modules-dkms:

root@UNIPI1-sn1:/home/pi#dpkg -l *kernel*
...
ii  raspberrypi-kernel         1.20190925+1-1      armhf        Raspberry Pi bootloader
ii  raspberrypi-kernel-headers 1.20190925+1-1      armhf        Header files for the Raspberry Pi Linux kernel
ii  unipi-kernel-modules-dkms  1.36                all          UniPi Neuron/Axon kernel modules - DKMS source
...

If you upgraded kernel, reboot the system. Check the appropriate version of your headers:

root@UNIPI1-sn1:/home/pi# uname -r
4.19.75-v7+
root@UNIPI1-sn1:/home/pi# ls /usr/src/
linux-headers-4.19.75+  linux-headers-4.19.75-v7+  linux-headers-4.19.75-v7l+  unipi-1.36

Then, remove the package:

apt purge unipi-kernel-modules-dkms

And install it again

apt install unipi-kernel-modules-dkms

Have you been successful with the procedure?

Achilleas Kotsis

Upon further investigation, I have located the issue.
dkms checks for installed kernels using the presence of files in /boot directory, including config-* files
As you can see on a normal x64 debian:

akots@xps:~$ ls -l /boot/config-*
-rw-r--r-- 1 root root 235827 Nov 12 10:46 /boot/config-5.3.0-23-generic
-rw-r--r-- 1 root root 235885 Nov 14 00:41 /boot/config-5.3.0-24-generic

On raspbian, package unipi-common installs two scripts

root@basementplc:# dpkg -S /etc/initramfs-tools/scripts/init-bottom/setbootconfig.sh
unipi-common: /etc/initramfs-tools/scripts/init-bottom/setbootconfig.sh
root@basementplc:~# dpkg -S /etc/kernel/postinst.d/initrd-config
unipi-common: /etc/kernel/postinst.d/initrd-config

These two scripts create two files in /boot matching the config-* expression

root@basementplc:/etc# ls -l /boot/config-*
-rwxr-xr-x 1 root root 212 Nov 10 11:01 /boot/config-initrd.inc
-rwxr-xr-x 1 root root 108 Sep 29 05:38 /boot/config-unipi.inc

These are the culpit. Renaming these to config_initrd.inc and config_unipi.inc, and changing the relevant includes in /boot/config.txt fixes the issue.

So, you need to patch unipi-common in order to create files that don't match files that dkms mistakes for kernel configs.
Attached patches for both files.

--- initrd-config.orig	2019-12-18 16:18:34.483277993 +0200
+++ initrd-config	2019-12-18 16:19:31.032380354 +0200
@@ -1,10 +1,15 @@
 #!/bin/bash
 
 CONFIGTXT=/boot/config.txt
-CONFIGINC=config-initrd.inc
+CONFIGINC=config_initrd.inc
 PATHINC="/boot/${CONFIGINC}"
 
-# check or insert include directive  into config.txt  
+# Remove old file using '-' instead of '_'
+rm -f "/boot/config-initrd.inc"
+# Change include using '-' instead of '_'
+sed -i "s/include config-initrd\.inc/include config_initrd.inc/" "${CONFIGTXT}"
+
+# check or insert include directive into config.txt  
 INCLUDE="include ${CONFIGINC}"
 grep -q -e "^[[:blank:]]*${INCLUDE}" "${CONFIGTXT}" || sed "1 i${INCLUDE}" -i "${CONFIGTXT}"

--- setbootconfig.sh.orig	2019-09-20 12:43:10.000000000 +0300
+++ setbootconfig.sh	2019-12-18 16:34:06.618599153 +0200
@@ -54,10 +54,15 @@
 	echo "dtoverlay=i2c-rtc,mcp7941x"
 	echo "dtoverlay=unipiee"
 	[ "$IS_UNIPI1" = "1" ] || echo "dtoverlay=neuron-spi-new"
-) >"${MNTDIR}/config-unipi.inc"
+) >"${MNTDIR}/config_unipi.inc"
+
+# Remove old file using '-' instead of '_'
+rm -f "${MNTDIR}/config-unipi.inc"
+# Change include using '-' instead of '_'
+sed -i "s/include config-unipi\.inc/include config_unipi.inc/" "${MNTDIR}/config.txt"
 
 # check or insert include into config.txt
-INCLUDE="include config-unipi.inc"
+INCLUDE="include config_unipi.inc"
 grep -q -e "^[[:blank:]]*${INCLUDE}" "${MNTDIR}/config.txt" || sed "1 i${INCLUDE}" -i "${MNTDIR}/config.txt"
 
 if [ "${DO_MOUNT}" = "1" ]; then

Martin Kudláček

Hi @achilleas-kotsis, thank you for such a detailed explanation. We have merged your patch into unipi-common 1.2.17.test.20191219101434 available in our testing repository. If you have recent image, all you have to do is: apt install unipi-common=1.2.17.test.20191219101434. After some testing we will merge it into master branch.

As a small reward, you have a discount of 50EUR for your next purchase. We have set it for your account, but please remind it in the order of the description as well.

Thank you and have a nice day,
Martin

Achilleas Kotsis

Hi @martin-kudláček,
thanks for the reward.

Can't find the testing repository url, can you please send it?

Thanks,
Achilleas

Martin Kudláček

Hi @achilleas-kotsis,
the change has been merged to the 1.2.18.

The testing repository has the same url, just make sure to add component test:

deb https://repo.unipi.technology/debian buster main test

To prefer packages from main, add file /etc/apt/preferences.d/10-unipi-prefer-main with this content:

Package: *
Pin: release o=unipi,c=main
Pin-Priority: 900

All of that is preconfigured in our images.

Achilleas Kotsis

One more patch against the latest version that renames the old file during package configuration, because if it gets upgraded on a live system, the previously inserted code is not executed (script exits early if devices are found)

--- setbootconfig.sh.orig	2019-12-19 21:39:51.490185707 +0200
+++ setbootconfig.sh	2019-12-19 22:04:27.094799784 +0200
@@ -9,6 +9,10 @@
 if [ "$1" = "--noreboot" -o -n "${DESTDIR}" ]; then
     ## called from package install
     MNTDIR=/boot
+    # Move old file using '-' instead of '_'
+    [ -f "${MNTDIR}/config-unipi.inc" ] && mv -f "${MNTDIR}/config-unipi.inc" "${MNTDIR}/config_unipi.inc"
+    # Change include using '-' instead of '_'
+    sed -i "s/include config-unipi\.inc/include config_unipi.inc/" "${MNTDIR}/config.txt"
     # check if running from "real" Neuron system
     grep -q '^/dev/mmcblk[[:digit:]]p1 /boot ' /proc/mounts && IS_REAL_SYSTEM=1
 else

This cleaned up my system perfectly doing a dpkg-reconfigure unipi-common so I suppose it should be working on the package being upgraded also. I can test one of my systems if you generate a testing package to see if it applies cleanly.

Martin Kudláček

Hi @achilleas-kotsis,
thank you for the testing. Your patch is included in the testing version 1.2.19.test.20191220083937 available in the testing repository.

Best regards,
Martin

Achilleas Kotsis

@martin-kudláček said in unipi-kernel-modules-dkms does not generate modules on upgrade:

1.2.19.test.20191220083937

I can confirm the package works as intended on my systems.

Thanks,
Achilleas

Achilleas Kotsis

Hi @Martin-Kudláček,

found another issue on latest rpi kernel.

Building initial module for 4.19.93+
Error!  Build of unipi.ko failed for: 4.19.93+ (armv7l)
Consult the make.log in the build directory
/var/lib/dkms/unipi/1.36/build/ for more information.
root@vkplc-home:~# cat /var/lib/dkms/unipi/1.36/build/make.log 
DKMS make.log for unipi-1.36 for kernel 4.19.93+ (armv7l)
Wed 22 Jan 2020 12:33:22 PM EET
make: Entering directory '/usr/src/linux-headers-4.19.93+'
  CC [M]  /var/lib/dkms/unipi/1.36/build/unipi/src/unipi_spi.o
  CC [M]  /var/lib/dkms/unipi/1.36/build/unipi/src/unipi_iio.o
  CC [M]  /var/lib/dkms/unipi/1.36/build/unipi/src/unipi_gpio.o
  CC [M]  /var/lib/dkms/unipi/1.36/build/unipi/src/unipi_uart.o
/var/lib/dkms/unipi/1.36/build/unipi/src/unipi_uart.c: In function ‘neuronspi_uart_handle_rx’:
/var/lib/dkms/unipi/1.36/build/unipi/src/unipi_uart.c:320:31: error: passing argument 1 of ‘uart_handle_sysrq_char’ from incompatible pointer type [-Werror=incompatible-pointer-types]
    if (uart_handle_sysrq_char(port, ch))
                               ^~~~
In file included from /var/lib/dkms/unipi/1.36/build/unipi/src/unipi_common.h:36,
                 from /var/lib/dkms/unipi/1.36/build/unipi/src/unipi_uart.h:22,
                 from /var/lib/dkms/unipi/1.36/build/unipi/src/unipi_uart.c:19:
./include/linux/serial_core.h:514:42: note: expected ‘struct uart_port *’ but argument is of type ‘struct neuronspi_port *’
 uart_handle_sysrq_char(struct uart_port *port, unsigned int ch) { return 0; }
                        ~~~~~~~~~~~~~~~~~~^~~~
  CC [M]  /var/lib/dkms/unipi/1.36/build/unipi/src/unipi_sysfs.o
cc1: some warnings being treated as errors
make[1]: *** [scripts/Makefile.build:303: /var/lib/dkms/unipi/1.36/build/unipi/src/unipi_uart.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:1522: _module_/var/lib/dkms/unipi/1.36/build/unipi] Error 2
make: Leaving directory '/usr/src/linux-headers-4.19.93+'
make: Entering directory '/usr/src/linux-headers-4.19.93+'
  CC [M]  /var/lib/dkms/unipi/1.36/build/rtc-unipi/rtc-unipi.o
/var/lib/dkms/unipi/1.36/build/rtc-unipi/rtc-unipi.c: In function ‘rtc_unipi_probe’:
/var/lib/dkms/unipi/1.36/build/rtc-unipi/rtc-unipi.c:666:6: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
      struct nvmem_config nvmem_cfg = {
      ^~~~~~
  Building modules, stage 2.
  MODPOST 1 modules
  CC      /var/lib/dkms/unipi/1.36/build/rtc-unipi/rtc-unipi.mod.o
  LD [M]  /var/lib/dkms/unipi/1.36/build/rtc-unipi/rtc-unipi.ko
make: Leaving directory '/usr/src/linux-headers-4.19.93+'```

Line 320 in unipi_uart.c

if (uart_handle_sysrq_char(port, ch))

passes "port" as an arqument to uart_handle_sysrq_char, which is of type "struct neuronspi_port", but uart_handle_sysrq_char expects a type of "struct uart_port", which is part of struct neuronspi_port as seen on unipi_common.h.

Changing line 320 as below seems to fix the issue.

if (uart_handle_sysrq_char(&port->port, ch))

Martin Kudláček

Hi @achilleas-kotsis,
thanks again for the fix:) We have merged it into a testing repository alongside with fix of the Makefile, which masked this error to the Gitlab CI and allowed building it in the first place. We will test it and soon merge into the master branch.

pmandeli

Hi @achilleas-kotsis , @Martin-Kudláček ,

has it been fixed in the master branch? I am facing to the same problem.

Thank you

Martin Kudláček

Hi @pmandeli,
not yet, but the change is available for testing here: https://repo.unipi.technology/debian/pool/test/u/unipi-kernel-modules/unipi-kernel-modules-dkms_1.37.test.20200122161658_all.deb

wbm smart

Thank you