[elrepo] CONFIG_FW_LOADER_USER_HELPER

[Orion Poplawski]

Please disable CONFIG_FW_LOADER_USER_HELPER in the elrepo kernels.  This 
introduces significant delays in loading firmware for various devices. 
For example:

[    4.318150] iwlwifi 0000:3a:00.0: Direct firmware load for 
iwlwifi-7265-19.ucode failed with error -2
[    4.318153] iwlwifi 0000:3a:00.0: Falling back to user helper
[   64.319419] iwlwifi 0000:3a:00.0: Direct firmware load for 
iwlwifi-7265-18.ucode failed with error -2
[   64.319429] iwlwifi 0000:3a:00.0: Falling back to user helper
[  124.326998] iwlwifi 0000:3a:00.0: loaded firmware version 17.352738.0 
op_mode iwlmvm

Each failed attempt results in a 60 second delay in attempting to load 
the firmware.  From my research, this is not recommended to be set, and 
RHEL and Fedora do not set it.

https://bugzilla.redhat.com/show_bug.cgi?id=1317148
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1398458
http://unix.stackexchange.com/questions/163012/iwlwifi-timeout-delays-firmware-to-be-loaded

unfortunately the workaround in the last one didn't work for me.

Thanks.

/boot/config-3.10.0-327.18.2.el7.x86_64:# CONFIG_FW_LOADER_USER_HELPER 
is not set
/boot/config-3.10.0-327.22.2.el7.x86_64:# CONFIG_FW_LOADER_USER_HELPER 
is not set
/boot/config-3.10.0-327.28.2.el7.x86_64:# CONFIG_FW_LOADER_USER_HELPER 
is not set
/boot/config-3.10.0-327.28.3.el7.x86_64:# CONFIG_FW_LOADER_USER_HELPER 
is not set
/boot/config-4.4.16-1.el7.elrepo.x86_64:CONFIG_FW_LOADER_USER_HELPER=y
/boot/config-4.4.16-1.el7.elrepo.x86_64:CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y


-- 
Orion Poplawski
Technical Manager                     303-415-9701 x222
NWRA/CoRA Division                    FAX: 303-415-9702
3380 Mitchell Lane                  orion at cora.nwra.com
Boulder, CO 80301              http://www.cora.nwra.com