Hi, We are using denx kernel 2.6.31.4 on ppc405ex with national semiconductor DP83640 Ethernet transceiver. The kernel driver (ibm_newemac) seems to hang after setting the ethernet phy to use 10Mbps Full-duplex settings. The time after which the driver hangs is random.
I am predicting that it's the driver issue because we cannot send or receive any packets even though ethernet phy detects a good link and interface is up (eth0). Bringing the interface down and back up using ifconfig command fixes the hang and normal packet transfer continues. Also, some times during 10Mbps operation we see following warning from the kernel: eth0: link is up, 10 FDX NETDEV WATCHDOG: eth0 (emac): transmit queue 0 timed out ------------[ cut here ]------------ Badness at net/sched/sch_generic.c:246 NIP: c02094a4 LR: c02094a4 CTR: c0175af0 REGS: c03a9d00 TRAP: 0700 Not tainted (2.6.31.4) MSR: 00029030 <EE,ME,CE,IR,DR> CR: 24000024 XER: 20000000 TASK = c037f440[0] 'swapper' THREAD: c03a8000 GPR00: c02094a4 c03a9db0 c037f440 0000003f 00002631 ffffffff c0175a5c 00000036 GPR08: c03b1d40 c0380000 00002631 00004000 24000082 fffffeef 0ffed700 00800000 GPR16: 00000000 007fff00 c038138c c03b0000 c0300000 c03b0000 0000000a c03a9e18 GPR24: c0380000 c03a8000 00000000 c03b5ec8 c03b0000 c0380000 00000000 cf012000 NIP [c02094a4] dev_watchdog+0x290/0x2a0 LR [c02094a4] dev_watchdog+0x290/0x2a0 Call Trace: [c03a9db0] [c02094a4] dev_watchdog+0x290/0x2a0 (unreliable) [c03a9e10] [c002d60c] run_timer_softirq+0xfc/0x1b8 [c03a9e50] [c00284a8] __do_softirq+0xb0/0x130 [c03a9e90] [c0004900] do_softirq+0x58/0x5c [c03a9ea0] [c00282bc] irq_exit+0x48/0x58 [c03a9eb0] [c000bd94] timer_interrupt+0xa4/0x108 [c03a9ed0] [c000f618] ret_from_except+0x0/0x18 [c03a9f90] [c0007eb0] cpu_idle+0xd0/0xe0 [c03a9fb0] [c0002928] rest_init+0x5c/0x6c [c03a9fc0] [c0355738] start_kernel+0x230/0x2b8 [c03a9ff0] [c0002254] start_here+0x44/0xb0 Instruction dump: 7c0903a6 4bffff78 38810008 7fe3fb78 38a00040 4bfebc4d 7c651b78 3c60c033 7fc6f378 7fe4fb78 3863e668 4be1a415 <0fe00000> 38000001 901cfa00 4bffff14 eth0: link is down Does anyone have an understanding of how ibm_newemac is supposed to behave in 10Mbps Full-duplex operation? any help to solve this issue is really appreciated Thanks! -Jignesh _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
