Description of problem:
Kdump fails to capture a vmcore when using eMMC storage to dump the core.

Version-Release number of selected component (if applicable):
RHEL 9.4 - 5.14.0-427.13.1.el9_4.x86_64
Modules - mmc_block.

How reproducible:
Always

Steps to Reproduce:

1. Add the kdump configuration as below -

 # grep -v "#" /etc/kdump.conf
~~~
auto_reset_crashkernel yes
core_collector makedumpfile -l --message-level 7 -d 31
path /var/crash
xfs UUID="a36c0aa5-c409-44cf-b2ff-e36a4c287a16"   >>> The dump target should be eMMC block.
~~~

 # blkid | grep root
~~~
/dev/mapper/rhel-root: UUID="a36c0aa5-c409-44cf-b2ff-e36a4c287a16" BLOCK_SIZE="512" TYPE="xfs"

~~~

 # lsblk
~~~
 NAME                  MAJ:MIN    RM     SIZE      RO    TYPE     MOUNTPOINTS
mmcblk0               179:0        0       116.5G    0      disk
└─mmcblk0p3   179:3        0        114.9G   0      part
       ├─rhel-root   253:0       0             70G    0      lvm          /         ---------->>
~~~

2. Restart the kdump.service

         # systemctl restart kdump.service

3. Crash the server using SysRq -

        # echo 1 > /proc/sys/kernel/sysrq

        # echo 'c' > /proc/sysrq-trigger

Actual results:

The kdump fails to generate vmcore with below errror -
~~~
[ 194.393167] dracut-initqueue[346]: Warning: dracut-initqueue: starting timeout scripts
[ 194.871813] dracut-initqueue[346]: Warning: dracut-initqueue: timeout, still waiting for following initqueue hooks:
[ 194.883206] dracut-initqueue[346]: Warning: /lib/dracut/hooks/initqueue/finished/devexists-\x2fdev\x2fmapper\x2frhel-root.sh: "[ -e "/dev/mapper/rhel-root""
[ 194.900180] dracut-initqueue[346]: Warning: /lib/dracut/hooks/initqueue/finished/devexists-\x2fdev\x2frhel\x2froot.sh: "[ -e "/dev/rhel/root" ]"
[ 194.914167] dracut-initqueue[346]: Warning: dracut-initqueue: starting timeout scripts
[ 195.392726] dracut-initqueue[346]: Warning: dracut-initqueue: timeout, still waiting for following initqueue hooks:
[ 195.404194] dracut-initqueue[346]: Warning: /lib/dracut/hooks/initqueue/finished/devexists-\x2fdev\x2fmapper\x2frhel-root.sh: "[ -e "/dev/mapper/rhel-root""
[ 195.421183] dracut-initqueue[346]: Warning: /lib/dracut/hooks/initqueue/finished/devexists-\x2fdev\x2frhel\x2froot.sh: "[ -e "/dev/rhel/root" ]"
[ 195.435167] dracut-initqueue[346]: Warning: dracut-initqueue: starting timeout scripts
[ 195.913819] dracut-initqueue[346]: Warning: dracut-initqueue: timeout, still waiting for following initqueue hooks:
[ 195.925193] dracut-initqueue[346]: Warning: /lib/dracut/hooks/initqueue/finished/devexists-\x2fdev\x2fmapper\x2frhel-root.sh: "[ -e "/dev/mapper/rhel-root""
[ 195.942180] dracut-initqueue[346]: Warning: /lib/dracut/hooks/initqueue/finished/devexists-\x2fdev\x2frhel\x2froot.sh: "[ -e "/dev/rhel/root" ]"
[ 195.956167] dracut-initqueue[346]: Warning: dracut-initqueue: starting timeout scripts
[ 196.434726] dracut-initqueue[346]: Warning: dracut-initqueue: timeout, still waiting for following initqueue hooks:
[ 196.446194] dracut-initqueue[346]: Warning: /lib/dracut/hooks/initqueue/finished/devexists-\x2fdev\x2fmapper\x2frhel-root.sh: "[ -e "/dev/mapper/rhel-root""
[ 196.463170] dracut-initqueue[346]: Warning: /lib/dracut/hooks/initqueue/finished/devexists-\x2fdev\x2frhel\x2froot.sh: "[ -e "/dev/rhel/root" ]"
[ 196.477165] dracut-initqueue[346]: Warning: dracut-initqueue: starting timeout scripts
[ 196.488163] dracut-initqueue[346]: Warning: Could not boot.
[ 196.494235] systemd[1]: systemd-ask-password-console.path: Deactivated successfully.
[ 196.502198] systemd[1]: Stopped Dispatch Password Requests to Console Directory Watch.
[ OK ] Stopped Dispatch Password …ts to Console Directory Watch.
[ 196.524282] systemd[1]: Stopped target Basic System.
[ OK ] Stopped target Basic System.
[ 196.536231] systemd[1]: Stopped target System Initialization.
[ OK ] Stopped target System Initialization.
[ 196.557897] systemd[1]: Starting Kdump Error Handler...
Starting Kdump Error Handler...
[ 196.568445] kdump[2928]: Kdump is using the default log level(3).
[ 196.573840] kdump[2933]: Executing failure action systemctl reboot -f
[ 196.577569] systemd[1]: Shutting down.
[ 196.579050] dracut-initqueue[346]: Warning: Not all disks have bee
~~~

Expected results:
Kdump should generate the vmcore in the specified target location.

Example -

 # tree /var/crash/
~~~
/var/crash/
├── 127.0.0.1-2024-08-21-11:27:30
│   ├── kexec-dmesg.log
│   ├── vmcore        >>>
│   └── vmcore-dmesg.txt
~~~