(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Mon, 7 Feb 2011 19:24:29 GMT bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=28552 > > Summary: ipheth stopped working between 2.6.35.9 and 2.6.36.2 > Product: Drivers > Version: 2.5 > Kernel Version: 2.6.36.2 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Network > AssignedTo: drivers_network@xxxxxxxxxxxxxxxxxxxx > ReportedBy: linux-kernel@xxxxxxxxxxxx > Regression: Yes > > > Created an attachment (id=46762) > --> (https://bugzilla.kernel.org/attachment.cgi?id=46762) > tcpdump of iPhone tethering attempt in 2.6.36.2 > > Overview: > > Internet connection via iPhone 3G ("USB tethering") no longer works in > 2.6.36.2; it appears that the packets coming from the iPhone are > misinterpreted. > > Steps to Reproduce: > > 1) Connect iPhone to computer via USB cable > > 2) Put iPhone in "tethering" mode > > Actual Results: > > The DHCP client times out trying to obtain a lease. > > Expected Results: > > The computer gets IP information via DHCP, and is able to share the > iPhone's internet connection. > > Build Date & Platform: > > 2.6.36.2 on x86_64 > iPhone 3G Firmware 3.1.3 > > Additional Builds and Platforms: > > 2.6.35.9 on x86_64 (same hardware) works as expected. > > Additional Information: > > Attached are 2 tcpdump logs: > 2.6.36.2-tcpdump.txt in the failure case > 2.6.35.9-tcpdump.txt, working connection setup > > Comparing the DHCP reply at 19:53:36.581403 (works) to 19:05:05.744666 (fails) > it appears that 2.6.36.2 misinterprets the data coming from the iPhone, so that > the failing packet is not recognized as an IP packet / valid DHCP reply. > > The change to ipheth.c itself between 2.6.36 and 2.6.35 seems trivial: > http://lxr.free-electrons.com/diff/drivers/net/usb/ipheth.c?v=2.6.35;diffval=2.6.36;diffvar=v > > Therefore I'd at first tried copying 2.6.35's ipheth.c into my 2.6.36 tree and > rebuilding this driver; it appears to fail the same as vanilla 2.6.36 does > [sorry, no logs - I can repeat this if required]. > > This suggests that the failure happens somewhere in either the networking or > USB layer, not the ipheth.c driver itself. > > I'm happy to perform any additional testing required. > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
