Due to misconfiguration of PCI driver for Intel Quark the user will get a kernel crash:
# udhcpc -i eth0 udhcpc: started, v1.26.2 stmmaceth 0000:00:14.6 eth0: device MAC address 98:4f:ee:05:ac:47 Generic PHY stmmac-a6:01: attached PHY driver [Generic PHY] (mii_bus:phy_addr=stmmac-a6:01, irq=-1) stmmaceth 0000:00:14.6 eth0: IEEE 1588-2008 Advanced Timestamp supported stmmaceth 0000:00:14.6 eth0: registered PTP clock IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready udhcpc: sending discover stmmaceth 0000:00:14.6 eth0: Link is Up - 100Mbps/Full - flow control off IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready BUG: unable to handle kernel NULL pointer dereference at (null) IP: stmmac_xmit+0xf1/0x1080 Fix this by adding necessary settings. P.S. I split fix to three patches according to what each of them adds. Andy Shevchenko (4): stmmac: pci: set default number of rx and tx queues stmmac: pci: TX and RX queue priority configuration stmmac: pci: RX queue routing configuration stmmac: pci: split out common_default_data() helper drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c | 41 +++++++++++------------- 1 file changed, 18 insertions(+), 23 deletions(-) -- 2.11.0
