#12415: Removeable media AHCI port reset bug
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Reporter: vidrep | Owner: kallisti5
Type: bug | Status: closed
Priority: blocker | Milestone: R1/beta1
Component: Drivers/Disk | Version: R1/Development
Resolution: fixed | Keywords: cdrom dvd bluray cd-rom
Blocked By: | Blocking: 12634
Has a Patch: 0 | Platform: All
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Changes (by kallisti5):
* status: assigned => closed
* resolution: => fixed
Comment:
Ok. 1d4c4d3 gave me some valuable notes on what the intent was. While I
was testing, reverting all of my changes still showed the constant port
resets. That paired with strange VirtualBox AHCI behavior made it look
like reverting my changes didn't fix it.
However the notes on 1d4c4d3 show that mmlr was simply "hiding" the AHCI
resets when no media is present. The resets happen continuously while no
media is present. (He should of thrown some comments in ^_^)
Since the suspect was the resets, I took a step back and looked at the
reset code... it appears I inadvertently made the resets "stronger" all of
the time. Since we now know the CDROM constantly "resets while no media is
present" the stronger AHCI resets result in funky removable media
behavior.
Resolved in hrev50195. I think there are a few bus state issues after
inserting a cdrom, however those can be cleaned up via a new ticket as the
AHCI stack recovers. I'll need to go back and hide error messages when no
media is present once this stuff is tested beyond my hardware.
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Ticket URL: <https://dev.haiku-os.org/ticket/12415#comment:23>
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