CVE-2023-54197 Revert "Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work"

In the Linux kernel, the following vulnerability has been resolved: Revert "Bluetooth: btsdio: fix use after free bug in btsdioremove due to unfinished work" This reverts commit 1e9ac114c4428fdb7ff4635b45d4f46017e8916f. This patch introduces a possible null-ptr-def problem. Revert it. And the fix...