[Bug 273289] smartpqi: fix panic on removal of SAS drive

In reply to: bugzilla-noreply_a_freebsd.org: "[Bug 273289] panic on removal of SAS drive"
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From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 30 Aug 2023 14:51:22 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273289

--- Comment #12 from John F. Carr <jfc@mit.edu> ---
This crash has happened all three times I removed an SAS SSD without a patched
kernel.  I have not tried with SATA drives.  Based on code inspection, there is
no race condition that would make the panic unpredictable.  Without INVARIANTS
you might see unpredictable behavior instead of a panic.

I exported the ZFS pool before removing the drive so there should have been no
references to the drive.  It was sitting idle.

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