From: Greg KH <gregkh@linuxfoundation.org>
To: bugzilla-daemon@kernel.org
Cc: linux-usb@vger.kernel.org
Subject: Re: [Bug 220090] New: usb: teach the usb subsystem about non-coherent dma
Date: Mon, 5 May 2025 18:20:08 +0200 [thread overview]
Message-ID: <2025050507-tipper-quartered-5bf4@gregkh> (raw)
In-Reply-To: <bug-220090-208809@https.bugzilla.kernel.org/>
On Mon, May 05, 2025 at 03:45:51PM +0000, bugzilla-daemon@kernel.org wrote:
> This is based on my findings attempting to bring the usb EHCI driver
> "ehci-hlwd" in wii-linux (https://wii-linux.org/) to mainline linux (6.14).
Great, please submit patches for this, BUT it looks like this:
> Commit 461db2bdbf3c978e76dd10a04a63fa06bb29114f changed the conditions needed
> to trigger a sync for non-coherent dma memory.
Might be the real root of the problems. Please work with the dma
developers to see if that's the cause, as all other platforms seem to
work just fine with the ehci drivers that we know of, so perhaps this is
just a dma subsystem setup issue somewhere for your platform?
thanks,
greg k-h
next prev parent reply other threads:[~2025-05-05 16:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-05 15:45 [Bug 220090] New: usb: teach the usb subsystem about non-coherent dma bugzilla-daemon
2025-05-05 16:20 ` Greg KH [this message]
2025-05-05 16:20 ` [Bug 220090] " bugzilla-daemon
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