From: Alan Stern <stern@rowland.harvard.edu>
To: Octavian Purdila <octavian.purdila@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Sarah Sharp <sarah.a.sharp@linux.intel.com>,
<linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] usb hub: send clear_tt_buffer_complete events when canceling TT clear work
Date: Mon, 1 Oct 2012 15:45:46 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.44L0.1210011544570.1183-100000@iolanthe.rowland.org> (raw)
In-Reply-To: <1349119272-21682-1-git-send-email-octavian.purdila@intel.com>
On Mon, 1 Oct 2012, Octavian Purdila wrote:
> There is a race condition in the USB hub code with regard to handling
> TT clear requests that can get the HCD driver in a deadlock. Usually
> when an TT clear request is scheduled it will be executed immediately:
...
> This patch changes hub_quiesce behavior to flush the TT clear work
> instead of canceling it, to make sure that no TT clear request remains
> uncompleted before suspend.
>
> Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
prev parent reply other threads:[~2012-10-01 19:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-01 17:01 [PATCH] usb hub: send clear_tt_buffer_complete events when canceling TT clear work Octavian Purdila
2012-10-01 17:34 ` Alan Stern
2012-10-01 17:48 ` Alan Stern
2012-10-01 18:12 ` Octavian Purdila
2012-10-01 19:21 ` [PATCH v2] " Octavian Purdila
2012-10-01 19:45 ` Alan Stern [this message]
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