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[Qemu-devel] [Bug 757654] Re: UHCI fails to signal stall response
From: |
Brad Hards |
Subject: |
[Qemu-devel] [Bug 757654] Re: UHCI fails to signal stall response |
Date: |
Mon, 11 Apr 2011 21:35:22 -0000 |
Hi,
Thanks for reporting this issue.
Just so you are aware: the qemu USB maintainer is probably going to be
away for a while longer, so don't be too worried if this patch doesn't
get looked at for 2-4 weeks.
Brad
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https://bugs.launchpad.net/bugs/757654
Title:
UHCI fails to signal stall response
Status in QEMU:
New
Bug description:
When TD execution results in STALL error (STALL handshake, no stall as
a result of err count reaching 0), there is no way to know about it
except for checking that TD. IMO it is an error condition and it
should be reflected in the status register (and issue an interrupt if
enabled).
Ways to replicate:
Send a query that is answered by stall (like set_idle request to a mouse)
Expected behavior:
UHCI hc sets status bit 1 (usb error interrupt) and issues an interrupt
current behavior:
Neither status bit is set nor interrupt triggered
Version 0.14
attached patch for current master (quick fix, it might be I got something
wrong)
- [Qemu-devel] [PATCH 0/5] PPC: Add FSL (e500) MMU emulation, Alexander Graf, 2011/04/30
- [Qemu-devel] [PATCH 1/5] PPC: Make MPC8544DS obey -cpu switch, Alexander Graf, 2011/04/30
- [Qemu-devel] [PATCH 3/5] PPC: Add GS MSR definition, Alexander Graf, 2011/04/30
- [Qemu-devel] [PATCH 2/5] PPC: Make MPC8544DS emulation work w/o KVM, Alexander Graf, 2011/04/30
- [Qemu-devel] [PATCH 4/5] PPC: Add another 64 bits to instruction feature mask, Alexander Graf, 2011/04/30
- [Qemu-devel] [PATCH 5/5] PPC: Implement e500 (FSL) MMU, Alexander Graf, 2011/04/30