Hi, adding missed cc. On Wed, Jul 15, 2015 at 09:12:14AM +0200, Alexander Aring wrote: > On Tue, Jul 14, 2015 at 11:22:32PM +0200, Baptiste Clenet wrote: > ... > > > > Kind of a backtrace (printk at each beginning of a function) > > root@OpenWrt:/# ip link set lowpan0 up > > [ 214.708111] lowpan_header_create > > [ 214.714520] lowpan_xmit > > [ 214.719378] lowpan_header > > [ 214.724569] tx.c dev_queue_xmit > > [ 214.730795] at86rf230_xmit_start > > [ 214.737669] at86rf230_write_frame > > [ 214.745539] at86rf230_write_frame_complete > > [ 214.828082] lowpan_header_create > > [ 214.834484] lowpan_xmit > > [ 214.839334] lowpan_header > > [ 214.844523] tx.c dev_queue_xmit > > [ 215.368119] lowpan_header_create > > [ 215.374529] lowpan_xmit > > [ 215.379398] lowpan_header > > [ 215.384589] tx.c dev_queue_xmit > > [ 216.368196] lowpan_header_create > > [ 216.374604] lowpan_xmit > > [ 216.379468] lowpan_header > > [ 216.384658] tx.c dev_queue_xmit > > [ 216.390934] lowpan_header_create > > [ 216.397319] lowpan_xmit > > [ 216.402168] lowpan_header > > [ 216.407351] tx.c dev_queue_xmit > > [ 216.898090] lowpan_header_create > > > > [ 216.904496] lowpan_xmit > > > > [ 216.909350] lowpan_header > > [ 216.914539] tx.c dev_queue_xmit > > [ 216.978063] lowpan_header_create > > [ 216.984464] lowpan_xmit > > [ 216.989312] lowpan_header > > [ 216.994498] tx.c dev_queue_xmit > > > > You see that at86rf230_xmit_start is called only once so I seems > > logical that while doing a ping6, it's not called as well. > > I maybe know what happens here. > > You transmit only one frame at beginning, this occurs that the netdev > queue will be stopped -> The driver layer doesn't get new "send a frame", > the xmit callback. > > This happens once, then the queue is stopped on the "tx completion > interrupt" we awake the queue again. -> The driver layer can send a > frame again. > > It seems for me that you don't get any irq, instrument please the function: > > at86rf230_isr > > and check > > cat /proc/interrupts > > if you see that the at86rf230 driver gets any interrupt. If not check > your irq settings. > > - Alex -- To unsubscribe from this list: send the line "unsubscribe linux-wpan" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
