88c7b3ee93
The systemd target `usb-gadget.target` is triggered by udev when a UDC
first comes up. It can happen that by the time gadget-start runs, this
UDC has been removed from the system again.
Have the gadget-start script exit with status 1 when `ls /sys/class/udc`
returns nothing.
Causing a service failure when no UDC is detected and no default was
given, allows the service to be restarted by a udev rule calling the
service (and not the target since those are not reentrant) directly. On
its own this patch will not do much.
For example, we saw such a situation using the DWC3 USB controller and
usb-conn-gpio kernel modules as loadables. By the time of the DWC3 init,
udev was active, and during init DWC3 started the USB OTG port in device
mode. If a pen drive was plugged in at boot, it would quickly switch to
host mode right after initialisation, emitting another udev event for
the removal of the UDC. The systemd target as thus reached, but by the
time gadget-start ran, the UDC was gone.
dwc3 init usb-conn-gpio role switch
│ │
▼ ▼
udev: add UDC─┐ udev: del UDC─────►/sys/class/udc empty
│ │
│ x
│ │
│ ▼
└────────────►usb-gadget.target─────►gadget-start
Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@toradex.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
meta-oe
This layer depends on:
URI: git://github.com/openembedded/openembedded-core.git branch: master
luajit recipe requires host compiler to be able to generate 32bit code when target is 32bit e.g. arm, so ensure that $CC -m32 is functional on build host, if building this recipe, needed packages to fullfit this might have different names on different host distributions e.g. on archlinux based distributions install prerequisites like below
pacman -S lib32-gcc-libs lib32-glibc
Ubuntu sudo apt-get install gcc-multilib linux-libc-dev:i386
Send pull requests to openembedded-devel@lists.openembedded.org with '[meta-oe]' in the subject'
When sending single patches, please use something like: 'git send-email -M -1 --to openembedded-devel@lists.openembedded.org --subject-prefix="meta-oe][PATCH"'
You are encouraged to fork the mirror on GitHub https://github.com/openembedded/meta-openembedded to share your patches, this is preferred for patch sets consisting of more than one patch.
Note, it is discouraged to send patches via GitHub pull request system. Such patches get less attention from developers and can be mishandled or not reviewed properly. Please use emails instead. For exemple, you can use 'git request-pull' to generate an email referencing your git repository.
Other services like GitLab, repo.or.cz or self-hosted setups are of course accepted as well, 'git fetch ' works the same on all of them. We recommend GitHub because it is free, easy to use, has been proven to be reliable and has a really good web GUI.
layer maintainer: Khem Raj raj.khem@gmail.com