libusb backend: attempt to fix DRAIN_OUTPUT race condition. Fixes #1461#1500

Merged

michaelrsweet merged 3 commits intoOpenPrinting:2.4.xfrom

ValdikSS:usb-race-condition-2.4

Mar 4, 2026

Commits on Feb 26, 2026

libusb backend: attempt to fix DRAIN_OUTPUT race condition. Fixes #1461
ValdikSS
committed
libusb backend: use pipe to wake up select()'ing main thread
ValdikSS
committed
libusb backend: send DRAIN response after drain_output is handled
ValdikSS
committed