On 08/03/2013 07:48 PM, Larry Finger wrote: > On 08/03/2013 11:55 AM, Michael Büsch wrote: >> On Sat, 03 Aug 2013 17:28:14 +0200 >> Hauke Mehrtens <hauke@xxxxxxxxxx> wrote: >> >>> I used wireshark to see what actually happens and the device send out >>> beacons and answers to probe requests without problems. I see the >>> Authentication, Association Request and Association Response frames and >> >> That suggests DMA works for some packets and then fails? >> >>> Does anybody have any thought on this topic? >> >> You should print out more of the DMA values. > > Could it possibly work with short packets, but fail on longer ones? > > Larry Hi, Thanks for the hints, in fact it was the size and I got my BCM4331 in the Access Point connected to a BCM4706 working. The problem was that the the PCIe controller used a PCIe max request size of 128, we try to change it in driver_pci_host.c, see "MRRS 512", but that does not get applied to the hardware, when reading it back it is not set, the Max payload size is changed. The BCM4331 uses a max request size of 512 by default and that causes problems. I solved the problem by setting the max request size to 128 for the BCM4331, pcie_set_readrq(bus->host_pci, 128) and then it worked. The patch is currently just in OpenWrt [0], I will send the patches to the mailing list in the next days. @Rafał If you haven't found a BCM4331, now you can use the one in your Access Point. ;-) Hauke [0]: https://dev.openwrt.org/changeset/37709 -- 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
