Hi, Pandita, Vikram a écrit : > Matthieu > >> -----Original Message----- >> From: linux-usb-owner@xxxxxxxxxxxxxxx [mailto:linux-usb-owner@xxxxxxxxxxxxxxx] On Behalf Of matthieu >> castet >> Sent: Wednesday, December 23, 2009 2:11 PM >> To: linux-usb@xxxxxxxxxxxxxxx >> Cc: Alan Stern >> Subject: [RFC] gadget ethernet dma align fix >> >> Hi, >> >> I attach a patch that should allow to use gadget ethernet with driver >> not supporting dma on unaligned address. >> >> This is untested on real hardware. > > Gave a first round of test on real hardware. > > 1) patch did not compile > a) missing ; > b) a typecast was needed like: ((unsigned long)skb->data & 3) > c) WARN_ON() getting hit multiple times, thereby generating un-managable amount of logs: so disable WARN_ON() That's not normal. We drop all these packets. That should explain why "Ping from device side hangs" is not working. What's the value of skb_headroom in this case. May be the check should be if ( (skb_headroom(skb) < ((unsigned long)skb->data & 3) )) Matthieu -- 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
