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Any icssg_set_port_state() command sent while a core is stopped or still booting times out waiting for firmware to ack it ("timeout waiting for command done"), and the write is lost with no retry. emac_ndo_set_rx_mode_work() sends exactly this kind of command to enable/disable UC/MC flooding based on IFF_PROMISC/IFF_ALLMULTI. If a port's rx_mode_work runs while firmware is being rebooted, the flood-enable command can be dropped, leaving that port without multicast flooding. Re-queue rx_mode_work for every running port at the end of the firmware start sequence in prueth_emac_common_start(), so the current IFF_PROMISC/IFF_ALLMULTI state is re-applied after a reboot. Also cancel the pending work in the stop_pruss error path so it cannot run after the cores are stopped again. prefix logs: https://gist.github.com/r-kumar12/91ee6fecd40ea3f22dcc65aba42705e1 postfix logs: https://gist.github.com/r-kumar12/4d5ade22d783020552b8a1e0c6d7102f Fixes: 9facce84f406 ("net: ti: icssg-prueth: Fix firmware load sequence.") Signed-off-by: Rishi Kumar --- drivers/net/ethernet/ti/icssg/icssg_prueth.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c index 745178fe7cf3..96ad6227f405 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c @@ -311,6 +311,18 @@ static int prueth_emac_common_start(struct prueth *prueth) if (ret) goto disable_class; + /* PRU/RTU/txPRU are up now: re-sync any port + * config (e.g. flood/promisc flags) that may have been + * dropped while firmware was still rebooting above. + */ + for (slice = 0; slice < PRUETH_NUM_MACS; slice++) { + emac = prueth->emac[slice]; + if (!emac) + continue; + if (netif_running(emac->ndev)) + schedule_work(&emac->rx_mode_work); + } + emac = prueth->emac[ICSS_SLICE0] ? prueth->emac[ICSS_SLICE0] : prueth->emac[ICSS_SLICE1]; ret = icss_iep_init(emac->iep, &prueth_iep_clockops, @@ -323,6 +335,11 @@ static int prueth_emac_common_start(struct prueth *prueth) return 0; stop_pruss: + for (slice = 0; slice < PRUETH_NUM_MACS; slice++) { + emac = prueth->emac[slice]; + if (emac) + cancel_work_sync(&emac->rx_mode_work); + } prueth_emac_stop(prueth); disable_class: -- 2.53.0