[Bug 1602717] [NEW] modprobe does not honor blacklist options in kernel cmdline unless -b is used (at least on the installer)

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== Comment: #0 - Mauricio Faria De Oliveira - 2016-07-11 18:47:59 ==
---Problem Description---
modprobe does not honor blacklist options in kernel cmdline unless -b is used (at least on the installer)

The modprobe.blacklist option is required as a work-around until a solution to a device-driver bug is found (IBM LTC bug 138273).
 
I've gone through the code of the kmod src pkg, but didn't spot anything obvious.
Passing along to the Ubuntu team.

Contact Information = Mauricio Faria de Oliveira <mauricfo at br.ibm.com> / Lekshmi C. Pillai <lekshmi.cpillai at in.ibm.com> 
  
---Steps to Reproduce---
 Boot the installer w/ this boot/kernel cmdline option (the alias w/ dashes is not required, but is here just in case):
    modprobe.blacklist=scsi_dh_alua,scsi-dh-alua    

On the dialog for username/password, select Go Back, then Exit to shell:

The blacklist is detected/present in the config:

~ # modprobe -c | grep alua
blacklist scsi_dh_alua
blacklist scsi-dh-alua

But the module is insmod-ed anyway:

~ # modprobe -v -n scsi-dh-alua
insmod /lib/modules/4.4.0-21-generic/kernel/drivers/scsi/device_handler/scsi_dh_alua.ko 

Unless -b is used:

~ # modprobe -v -n -b scsi-dh-alua
~ #

Installer kernel:
[    0.000000] Linux version 4.4.0-21-generic (buildd at bos01-ppc64el-017) (gcc version 5.3.1 20160413 (Ubuntu/IBM 5.3.1-14ubuntu2) ) #37-Ubuntu SMP Mon Apr 18 18:30:22 UTC 2016 (Ubuntu 4.4.0-21.37-generic 4.4.6)

** Affects: debian-installer (Ubuntu)
     Importance: Undecided
     Assignee: Taco Screen team (taco-screen-team)
         Status: New


** Tags: architecture-ppc64le bugnameltc-143679 severity-high targetmilestone-inin16041
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modprobe does not honor blacklist options in kernel cmdline unless -b is used (at least on the installer)
https://bugs.launchpad.net/bugs/1602717
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