From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>,
linux-usb <linux-usb@vger.kernel.org>,
Kernel development list <linux-kernel@vger.kernel.org>,
Greg KH <greg@kroah.com>,
Sarah Sharp <sarah.a.sharp@linux.intel.com>,
Mathias Nyman <mathias.nyman@intel.com>
Subject: Re: Missing USB XHCI and EHCI reset for kexec
Date: Sun, 08 Jun 2014 07:11:18 +1000 [thread overview]
Message-ID: <1402175478.3247.299.camel@pasglop> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1406071133090.31120-100000@netrider.rowland.org>
On Sat, 2014-06-07 at 11:40 -0400, Alan Stern wrote:
> The current xhci-hcd driver includes a quirk flag (XHCI_SPURIOS_WAKEUP)
> that causes the shutdown routine to reset the controller. It wasn't
> meant for fixing kexec problems, but I bet you could use it for that
> purpose.
>
> In addition, it's possible that a reset is needed in the probe pathway.
Ok, thanks. I'll have a look. A reset in the probe means fixing distros,
I'd rather find a way to fix it from the kexec path entirely, even if
that involves adding a quirk on the way out to reset it in shutdown()
I'll see what I can come up with that works and will come back to you.
Cheers,
Ben.
next prev parent reply other threads:[~2014-06-07 21:11 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-13 19:22 Missing USB XHCI and EHCI reset for kexec Stefani Seibold
2014-04-14 2:14 ` Alan Stern
2014-04-14 13:54 ` stefani
2014-04-14 14:49 ` Alan Stern
2014-04-14 15:25 ` stefani
2014-04-14 16:27 ` Alan Stern
2014-04-14 16:35 ` Stefani Seibold
2014-04-14 17:58 ` Alan Stern
2014-04-15 18:32 ` Stefani Seibold
2014-04-15 19:05 ` Alan Stern
2014-04-15 19:08 ` Stefani Seibold
2014-04-15 18:30 ` Stefani Seibold
2014-04-15 19:02 ` Alan Stern
2014-04-15 19:06 ` Stefani Seibold
2014-04-15 19:14 ` Alan Stern
2014-04-15 19:17 ` Stefani Seibold
2014-04-15 19:14 ` Stefani Seibold
2014-04-15 19:34 ` Alan Stern
2014-04-14 9:42 ` Benjamin Herrenschmidt
2014-04-14 15:44 ` stefani
2014-04-14 21:48 ` Thadeu Lima de Souza Cascardo
2014-04-15 10:04 ` stefani
2014-04-15 12:20 ` Thadeu Lima de Souza Cascardo
2014-04-15 15:00 ` stefani
2014-04-15 18:33 ` Thadeu Lima de Souza Cascardo
2014-04-15 18:42 ` Stefani Seibold
2014-04-15 18:49 ` Thadeu Lima de Souza Cascardo
2014-04-15 18:54 ` Stefani Seibold
2014-06-07 8:15 ` Benjamin Herrenschmidt
2014-06-07 15:40 ` Alan Stern
2014-06-07 21:11 ` Benjamin Herrenschmidt [this message]
2014-06-07 22:35 ` Benjamin Herrenschmidt
2014-06-08 1:09 ` Alan Stern
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