(RHEL-55708) rhel 9 fix 55708 #99
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pvalena
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Nov 27, 2024
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pvalena
commented
- fix(kernel-modules): use modalias info in get_dev_module()
- fix(dracut-functions.sh): convert mmcblk to the real kernel module name
When calling dracut with '--hostonly-mode=strict', get_dev_module() gets called on the system's block devices to find the required drivers. The driver name is retrieved using udevadm. However, the driver name returned by udevadm is not necessarily the same as the module name. This is the case for the Qualcomm UFS driver: udevadm returns 'ufshcd-qcom' while the module name is 'ufs-qcom', so dracut-install is not able to find the module afterwards. To solve this, make get_dev_module() also return the module alias info from the modalias files contained in the sysfs directories parsed by udevadm. Signed-off-by: Adrien Thierry <athierry@redhat.com> (cherry picked from commit 87a76db) Resolves: RHEL-55708
In some x86_64 platforms such as Intel Elkhartlake, an issue of missing
necessary modules due to udevadm drivers field unmatch the real kernel module
name is found:
$ udevadm info -a /dev/block/179:1
looking at parent device '/devices/pci0000:00/0000:00:1a.0/mmc_host/mmc0/mmc0:0001':
KERNELS=="mmc0:0001"
SUBSYSTEMS=="mmc"
DRIVERS=="mmcblk"
....
The DRIVERS field, aka mmcblk will be given to instmods to install the
corresponding mmc_block.ko kernel module. However mmc_block.ko cannot be
selected by string mmcblk, as a result, mmc_block.ko cannot be installed
in hostonly-mode strict, which will fail to bootup the machine such as in
kdump cases:
$ /usr/lib/dracut/dracut-install -D /var/tmp --kerneldir /lib/modules/$(uname -r)/ -m mmcblk
dracut-install: Failed to find module 'mmcblk'
In this patch, we will convert the string mmcblk to mmc_block, so the
kernel module can be successfully loaded.
Signed-off-by: Tao Liu <ltao@redhat.com>
(cherry picked from commit a62e895)
Resolves: RHEL-55708
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