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From: "Matěj Laitl" <matej@laitl.cz>
To: Daniel Mack <zonque@gmail.com>
Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com>,
	Alan Stern <stern@rowland.harvard.edu>,
	Florian Mickler <florian@mickler.org>,
	Oliver Neukum <oliver@neukum.org>,
	linux-usb@vger.kernel.org, alsa-devel@alsa-project.org,
	Takashi Iwai <tiwai@suse.de>,
	Clemens Ladisch <clemens@ladisch.de>,
	pedrib@gmail.com, William Light <wrl@illest.net>,
	Greg KH <greg@kroah.com>,
	linux-kernel@vger.kernel.org,
	Robert Hancock <hancockrwd@gmail.com>
Subject: Re: Allocating buffers for USB transfers (again)
Date: Fri, 12 Aug 2011 01:50:01 +0200	[thread overview]
Message-ID: <1451239.ZLFiT5MIDr@edgy> (raw)
In-Reply-To: <4E446873.9020508@gmail.com>

On 12. 8. 2011 Daniel Mack wrote:
> > This patch actually makes the sound playback _worse_. Now I get strange
> > squawks where previously at least first seconds of a song sounded
> > normally.
> > 
> > However, I no longer get "zero length buffer submitted" or that "...
> > Weird." debug messages, only several megabytes of: (should I post these
> > somewhere?)
> > 
> > xhci_hcd 0000:05:00.0: Giveback URB ffff880114cec000, len = 880,
> > expected = 1000, status = -115
> > xhci_hcd 0000:05:00.0: Giveback URB ffff880114740000, len = 352,
> > expected = 1000, status = -115
> > xhci_hcd 0000:05:00.0: underrun event on endpoint
> 
> Might be the hardware doesn't like this. As I said, the patch is blindly 
> written and I couldn't test it. Did you test this on a EHCI port as well?

Good point, this patch distorts the playback also on the EHCI port. (the 
playback seems to be 10 times slower than it should be)

Now I have to go, but I hope I'll get another patch from you tomorrow. :-)

Thanks,
               Matej


  reply	other threads:[~2011-08-11 23:50 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-07 11:53 Allocating buffers for USB transfers (again) Daniel Mack
2011-07-07 12:14 ` Clemens Ladisch
2011-07-07 12:29   ` Daniel Mack
2011-07-07 12:33 ` Oliver Neukum
2011-07-07 12:38   ` Daniel Mack
2011-07-07 13:08     ` Oliver Neukum
2011-07-08 15:13       ` Daniel Mack
2011-07-07 15:06     ` Alan Stern
2011-07-07 15:16     ` Florian Mickler
2011-08-10  7:51       ` Daniel Mack
2011-08-10 14:32         ` Alan Stern
2011-08-10 15:33           ` Daniel Mack
2011-08-10 18:06             ` Takashi Iwai
2011-08-10 23:15             ` Sarah Sharp
2011-08-11  0:57               ` Daniel Mack
2011-08-11 16:45                 ` Sarah Sharp
2011-08-11 17:27                   ` Daniel Mack
2011-08-11 18:05                     ` Sarah Sharp
2011-08-11 21:39                       ` Daniel Mack
2011-08-11 23:29                         ` Matěj Laitl
2011-08-11 23:40                           ` Daniel Mack
2011-08-11 23:50                             ` Matěj Laitl [this message]
2011-08-12  1:28                               ` Daniel Mack
2011-08-12  4:46                                 ` Sarah Sharp
2011-08-12  9:55                                   ` Daniel Mack
2011-08-11  3:22               ` Andiry Xu
2011-08-11 14:36                 ` Alan Stern
2011-07-07 13:53 ` Johannes Stezenbach

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