Hi,
On 03.05.2016 15:37, Bin Liu wrote:
Hi,
On Tue, May 03, 2016 at 03:19:10PM +0200, Yegor Yefremov wrote:
On Tue, May 3, 2016 at 3:16 PM, Bin Liu <b-liu@xxxxxx> wrote:
Hi,
On Tue, May 03, 2016 at 11:03:23AM +0200, Yegor Yefremov wrote:
On Thu, Apr 14, 2016 at 6:50 PM, Bin Liu <b-liu@xxxxxx> wrote:
Hi,
On Thu, Apr 07, 2016 at 09:09:50AM +0200, Yegor Yefremov wrote:
Could you then look at the freeze issue with removing FTDI device
during it is working?
I can. I will have to first locate a FT4243H device.
Insert MA260 and execute following command:
cat /dev/zero > /dev/ttyUSB2
then remove MA260 - system freezes.
Can you please try the patch [1] to see if it fixes the system freezing
issue?
[1] http://marc.info/?l=linux-usb&m=144683124825113&w=2
I've tested this patch with both FTDI FT4232HS as also Huawei
ME909u-521. I can produce a freeze with both devices.
Please remind me, is the dongle directly connected to MUSB or behind a
hub?
Behind a hub.
Btw your other patch "musb_host: fix lockup on rxcsr_h_error" is working.
Thanks for the update.
Can you please test the patch [1] instead? I'd like to use it as the
fix.
We are running a system on ChiliBoard (am335x) and we have also noticed
freezes caused by usb driver. After applying this patch, we are not able
to reproduce the issue anymore.
Our setup: We have Telit LE910 modem connected to USB hub, which is
connected to am335x. We use AT commands (usb option driver) to control
modem. Freezing happens when we poweroff the modem (issue poweroff to
modem, not simply remove the power). Before freeze, we have active
connection to some modem's virtual serial ports (GPS, modem connection).
We also noticed, that when we remove 5V power from the board, system
unfreezes and works ok from that time. In our case 5V is used to power
Telit modem.
Regards,
-Bin.
[1] http://marc.info/?l=linux-usb&m=146222355213935&w=2
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Regards,
Marcin
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