Hi Lukasz,
On Wed, 12 Nov 2014 11:11:33 -0700 Stephen Warren swarren@wwwdotorg.org wrote:
On 11/12/2014 09:45 AM, Wolfgang Denk wrote:
Dear Lukasz,
In message 20141112152949.1fe6ce3c@amdc2363 you wrote:
But this is a bug. Papering over is not a good idea. It should be analyzed, reported, and finally fixed.
I've debugged the script with strace.
Thanks a lot for that!
The problem is with umount() syscall:
...
I need to debug the syscall in the kernel.
I have a gut feeling that this might be a problem somewhere with the USB stuff that is involved here. Maybe enabling some degug messages for the USB subsystem gives some more information?
If this really is related to USB only, it may be worth asking on the linux-usb mailing list to see if anyone already unerstands the issue.
Frankly speaking, I'm personally curious why such things happen. I may look into the issue in my "spare :-)" time.
In spite of this, I agree with Stephen:
Irrespective of all this though, even if there is a kernel issue and it can be fixed, I still think we should apply this patch, because the issue currently affects people. At the very least it will until some kernel fix is rolled out to everyone's distro, which will be a while no matter what.
+1
The problem seems to be with long time running linux. The error seems to be orthogonal to our u-boot's UMS work.
U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Best regards, Lukasz Majewski
Applied to u-boot-dfu tree. Thanks.