Hello, On Monday, June 22, 2009 4:07 PM, Alan Stern wrote: > > > Marek> I would like to ask if someone has successfully used > g_serial > > > Marek> USB gadget driver with kernel 2.6.29 or 2.6.30? I'm > developing > > > Marek> a low level hardware driver for USB gadgets on ARM S3C6410 > > > Marek> platform. This driver is working quite fine (I've used it a > > > Marek> lot with g_ether CDC/RNDIS ethernet gadget driver). During > my > > > Marek> development I've found the following bug in g_serial > driver: > > > > > > You are aware that Ben Dooks has written an UDC driver for the OTG > > > controller on the s3c6410 which is now in mainline, right? > > > > > > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux- > > > 2.6.git;a=commit;h=5b7d70c6dbf2db786395cbd21750a1a4ce222f84 > > > > Yes, I am aware. That driver does not work well for me (but this is > the > > other case). However I did a test with his driver and the result was > also > > a kernel oops: > > > > [...] > > > > > I've used the g_serial driver on 2.6.29 without problems (not on > > > s3c6410 though). > > > > On what hardware you use the g_serial driver? It is ARM-based? I > > understand that this might be also related to the way that low level > > hardware gadget driver is implemented, but I really have no idea how > > to hunt for this bug. > > This is just a guess... But there's a good possibility that the oops > was caused by recent changes to the serial layer which have not been > propagated through to the g_serial driver. How recent these changes are? I did a test on another ARM-based Linux platform with old 2.6.28 kernel and the result was exactly the same as above... Best regards -- Marek Szyprowski Samsung Poland R&D Center -- 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
