On Saturday 31 October 2009, Johannes Berg wrote: > On Sat, 2009-10-31 at 09:51 +0100, Ivo van Doorn wrote: > > > > Ok. I looked at the problem and it's a very odd problem -- mac80211 > > > should always reserve enough headroom in buffers it passes to the > > > driver. Does rt61pci somehow realloc frames? > > > > It does use skb_push. but will/should always stay within the limits > > of rt2x00dev->hw->extra_tx_headroom. Although I just realize there > > might be a situation where it needs to align the frame to a 4-byte boundary, > > it could exceed that amount. :( > > extra_tx_headroom is set to max_t(driver, mac80211) so that there's > always some headroom. This doesn't take into account alignment though. > Should we simply add 2 to that value? 4 actually, wasn't there some cases where the header could have an odd number of bytes and would require 3 bytes for alignment? Ivo -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
