Module Name: src
Committed By: riastradh
Date: Sun Mar 13 11:29:10 UTC 2022
Modified Files:
src/sys/dev/usb: ehci.c ehcivar.h
Log Message:
ehci(4): Fix doorbell synchronization.
ehci_sync_hc was previously subject to spurious wakeup, in which case
the CPU might proceed from aborting and recycle a DMA buffer before
the hardware was done writing to it. Now the code is not subject to
spurious wakeup -- it waits (up to the 1sec timeout) for the relevant
interrupt to be delivered, not for anything else.
To generate a diff of this commit:
cvs rdiff -u -r1.307 -r1.308 src/sys/dev/usb/ehci.c
cvs rdiff -u -r1.49 -r1.50 src/sys/dev/usb/ehcivar.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
