Misc fixes, for thread-pool, xen, and xen-emulate
* fix an access to `request_cond` QemuCond in thread-pool
* fix issue with PCI devices when unplugging IDE devices in Xen guest
* several fixes for issues pointed out by Coverity
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# gpg: Signature made Tue 01 Aug 2023 02:38:47 AM PDT
# gpg: using RSA key
F80C006308E22CFD8A92E7980CF5572FD7FB55AF
# gpg: Good signature from "Anthony PERARD <anthony.perard@gmail.com>" [unknown]
# gpg: aka "Anthony PERARD <anthony.perard@citrix.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 5379 2F71 024C 600F 778A 7161 D8D5 7199 DF83 42C8
# Subkey fingerprint: F80C 0063 08E2 2CFD 8A92 E798 0CF5 572F D7FB 55AF
* tag 'pull-xen-
20230801' of https://xenbits.xen.org/git-http/people/aperard/qemu-dm:
xen-platform: do full PCI reset during unplug of IDE devices
xen: Don't pass MemoryListener around by value
thread-pool: signal "request_cond" while locked
xen-block: Avoid leaks on new error path
hw/xen: Clarify (lack of) error handling in transaction_commit()
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>