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From: Felipe Balbi <balbi@kernel.org>
To: "Yang\, Fei" <fei.yang@intel.com>,
	Andrzej Pietrasiewicz <andrzej.p@collabora.com>,
	John Stultz <john.stultz@linaro.org>,
	lkml <linux-kernel@vger.kernel.org>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>,
	Thinh Nguyen <thinhn@synopsys.com>,
	Tejas Joglekar <tejas.joglekar@synopsys.com>,
	Jack Pham <jackp@codeaurora.org>, Todd Kjos <tkjos@google.com>,
	Greg KH <gregkh@linuxfoundation.org>,
	Linux USB List <linux-usb@vger.kernel.org>,
	stable <stable@vger.kernel.org>
Subject: RE: [RFC][PATCH 0/2] Avoiding DWC3 transfer stalls/hangs when using adb over f_fs
Date: Thu, 23 Jan 2020 19:31:54 +0200	[thread overview]
Message-ID: <87o8uu3wqd.fsf@kernel.org> (raw)
In-Reply-To: <02E7334B1630744CBDC55DA8586225837F9EE280@ORSMSX102.amr.corp.intel.com>

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Hi,

"Yang, Fei" <fei.yang@intel.com> writes:
>>> Hey all,
>>>    I wanted to send these out for comment and thoughts.
>>> 
>>> Since ~4.20, when the functionfs gadget enabled scatter-gather 
>>> support, we have seen problems with adb connections stalling and 
>>> stopping to function on hardware with dwc3 usb controllers.
>>> Specifically, HiKey960, Dragonboard 845c, and Pixel3 devices.
>>
>> Any chance this:
>> 
>> https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git/commit/?h=testing/next&id=f63333e8e4fd63d8d8ae83b89d2c38cf21d64801
> This is a different issue. I have tried initializing num_sgs when debugging this adb stall problem, but it didn't help.

So multiple folks have run through this problem, but not *one* has
tracepoints collected from the issue? C'mon guys. Can someone, please,
collect tracepoints so we can figure out what's actually going on?

I'm pretty sure this should be solved at the DMA API level, just want to
confirm.

cheers

-- 
balbi

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  reply	other threads:[~2020-01-23 17:31 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-22 22:26 [RFC][PATCH 0/2] Avoiding DWC3 transfer stalls/hangs when using adb over f_fs John Stultz
2020-01-22 22:26 ` [RFC][PATCH 1/2] usb: dwc3: gadget: Check for IOC/LST bit in both event->status and TRB->ctrl fields John Stultz
2020-01-23  7:24   ` Felipe Balbi
2020-01-23 18:54     ` Yang, Fei
2020-01-24  0:47     ` John Stultz
2020-01-24  7:45       ` Felipe Balbi
2020-01-24 22:10         ` John Stultz
2020-01-25 11:02           ` Felipe Balbi
2020-01-27 18:48             ` John Stultz
2020-01-22 22:26 ` [RFC][PATCH 2/2] usb: dwc3: gadget: Correct the logic for finding last SG entry John Stultz
2020-01-23  7:25   ` Felipe Balbi
2020-01-23 15:50     ` Anurag Kumar Vulisha
2020-01-23  7:18 ` [RFC][PATCH 0/2] Avoiding DWC3 transfer stalls/hangs when using adb over f_fs Felipe Balbi
2020-01-23  8:43 ` Andrzej Pietrasiewicz
2020-01-23 16:29   ` Yang, Fei
2020-01-23 17:31     ` Felipe Balbi [this message]
2020-01-23 17:37       ` Yang, Fei
2020-01-23 17:46         ` Felipe Balbi
2020-01-23 18:28           ` Yang, Fei
2020-02-05 21:03           ` John Stultz
2020-02-06  6:23             ` Felipe Balbi
2020-02-06  7:40             ` Christoph Hellwig
2020-02-06 18:29               ` Felipe Balbi
2020-02-06 18:41                 ` Christoph Hellwig
2020-02-07  6:00                   ` Felipe Balbi
2020-01-23 19:58       ` John Stultz

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