Cannot retry fs mount command if first attempt failed

[pahindman]

Describe the bug

When using the fs mount littlefs command, the command may fail, typically due to a typo in the mount point name. Unfortunately, once this happens it cannot be used again until resetting Zephyr.

To Reproduce

Steps to reproduce:

uart:~$ fs mount littlefs invalid_mount_point
Error mounting as littlefs: -22
uart:~$ fs ls
uart:~$ fs mount littlefs /mount_point
uart:~$ fs ls
uart:~$

Expected behavior

uart:~$ fs mount littlefs invalid_mount_point
Error mounting as littlefs: -22
uart:~$ fs ls
uart:~$ fs mount littlefs /mount_point
uart:~$ fs ls
mount_point/
uart:~$

Impact

It's a minor annoyance. I've fixed it locally, and plan on posting a PR shortly.

Logs and console output

Environment (please complete the following information):

• OS: Ubuntu
• Toolchain: Zephyr SDK
• Commit SHA or Version used: 2bfc2a3

Additional context

[github-actions]

Hi @pahindman! We appreciate you submitting your first issue for our open-source project. 🌟

Even though I'm a bot, I can assure you that the whole community is genuinely grateful for your time and effort. 🤖💙

[de-nordic]

Buge is present since release v2.0.0, severity set as low, even though this can lead to device lockup, it is in shell, and only triggered by user when memory gets low - so it is rather happening in developer env than on released devices.