If iwl_configure_rxq is called when mvm->trans->num_rx_queues == 1, an RFH_QUEUE_CONFIG_CMD is sent with cmd->num_queues == 0. This results in an error when the interface is brought up: [ 10.073760] iwlwifi 0000:3b:00.0: Applying debug destination EXTERNAL_DRAM [ 10.239723] iwlwifi 0000:3b:00.0: FW already configured (0) - re-configuring [ 10.441592] iwlwifi 0000:3b:00.0: Microcode SW error detected. Restarting 0x2000000. [ 10.442812] iwlwifi 0000:3b:00.0: Start IWL Error Log Dump: [ 10.442815] iwlwifi 0000:3b:00.0: Status: 0x00000040, count: 6 [ 10.442817] iwlwifi 0000:3b:00.0: Loaded firmware version: 48.4fa0041f.0 cc-a0-48.ucode [ 10.442818] iwlwifi 0000:3b:00.0: 0x00000071 | NMI_INTERRUPT_UMAC_FATAL [ 10.442820] iwlwifi 0000:3b:00.0: 0x000022F0 | trm_hw_status0 [ 10.442821] iwlwifi 0000:3b:00.0: 0x00000000 | trm_hw_status1 [ 10.442822] iwlwifi 0000:3b:00.0: 0x004F8E3C | branchlink2 [ 10.442823] iwlwifi 0000:3b:00.0: 0x004E4FF4 | interruptlink1 [ 10.442825] iwlwifi 0000:3b:00.0: 0x004E4FF4 | interruptlink2 [ 10.442826] iwlwifi 0000:3b:00.0: 0x00016FF4 | data1 [ 10.442827] iwlwifi 0000:3b:00.0: 0x00001000 | data2 [ 10.442828] iwlwifi 0000:3b:00.0: 0xF0000008 | data3 [ 10.442829] iwlwifi 0000:3b:00.0: 0x00000000 | beacon time [ 10.442831] iwlwifi 0000:3b:00.0: 0x00053105 | tsf low [ 10.442832] iwlwifi 0000:3b:00.0: 0x00000000 | tsf hi [ 10.442833] iwlwifi 0000:3b:00.0: 0x00000000 | time gp1 [ 10.442834] iwlwifi 0000:3b:00.0: 0x00059A51 | time gp2 [ 10.442835] iwlwifi 0000:3b:00.0: 0x00000001 | uCode revision type [ 10.442836] iwlwifi 0000:3b:00.0: 0x00000030 | uCode version major [ 10.442838] iwlwifi 0000:3b:00.0: 0x4FA0041F | uCode version minor [ 10.442839] iwlwifi 0000:3b:00.0: 0x00000340 | hw version [ 10.442840] iwlwifi 0000:3b:00.0: 0x18C89000 | board version [ 10.442841] iwlwifi 0000:3b:00.0: 0x801FF500 | hcmd [ 10.442842] iwlwifi 0000:3b:00.0: 0x00020000 | isr0 [ 10.442843] iwlwifi 0000:3b:00.0: 0x00000000 | isr1 [ 10.442845] iwlwifi 0000:3b:00.0: 0x08F00002 | isr2 [ 10.442846] iwlwifi 0000:3b:00.0: 0x00C00008 | isr3 [ 10.442847] iwlwifi 0000:3b:00.0: 0x00000000 | isr4 [ 10.442848] iwlwifi 0000:3b:00.0: 0x000301D1 | last cmd Id [ 10.442849] iwlwifi 0000:3b:00.0: 0x00016FF4 | wait_event [ 10.442850] iwlwifi 0000:3b:00.0: 0x00000000 | l2p_control [ 10.442851] iwlwifi 0000:3b:00.0: 0x00000000 | l2p_duration [ 10.442852] iwlwifi 0000:3b:00.0: 0x00000000 | l2p_mhvalid [ 10.442853] iwlwifi 0000:3b:00.0: 0x00000000 | l2p_addr_match [ 10.442855] iwlwifi 0000:3b:00.0: 0x00000009 | lmpm_pmg_sel [ 10.442856] iwlwifi 0000:3b:00.0: 0x00000000 | timestamp [ 10.442857] iwlwifi 0000:3b:00.0: 0x00000828 | flow_handler [ 10.443452] iwlwifi 0000:3b:00.0: Start IWL Error Log Dump: [ 10.443453] iwlwifi 0000:3b:00.0: Status: 0x00000040, count: 7 [ 10.443454] iwlwifi 0000:3b:00.0: 0x20000034 | NMI_INTERRUPT_WDG [ 10.443456] iwlwifi 0000:3b:00.0: 0x00000000 | umac branchlink1 [ 10.443456] iwlwifi 0000:3b:00.0: 0xC008CC3C | umac branchlink2 [ 10.443458] iwlwifi 0000:3b:00.0: 0x8048E6D8 | umac interruptlink1 [ 10.443459] iwlwifi 0000:3b:00.0: 0x8048E6D8 | umac interruptlink2 [ 10.443460] iwlwifi 0000:3b:00.0: 0x00000004 | umac data1 [ 10.443461] iwlwifi 0000:3b:00.0: 0x8048E6D8 | umac data2 [ 10.443462] iwlwifi 0000:3b:00.0: 0x00000000 | umac data3 [ 10.443463] iwlwifi 0000:3b:00.0: 0x00000030 | umac major [ 10.443464] iwlwifi 0000:3b:00.0: 0x4FA0041F | umac minor [ 10.443465] iwlwifi 0000:3b:00.0: 0x00059A43 | frame pointer [ 10.443466] iwlwifi 0000:3b:00.0: 0xC0886A48 | stack pointer [ 10.443468] iwlwifi 0000:3b:00.0: 0x000B050D | last host cmd [ 10.443469] iwlwifi 0000:3b:00.0: 0x00000000 | isr status reg [ 10.443553] iwlwifi 0000:3b:00.0: Fseq Registers: [ 10.443605] iwlwifi 0000:3b:00.0: 0xE0000101 | FSEQ_ERROR_CODE [ 10.443657] iwlwifi 0000:3b:00.0: 0x00290011 | FSEQ_TOP_INIT_VERSION [ 10.443709] iwlwifi 0000:3b:00.0: 0x80050008 | FSEQ_CNVIO_INIT_VERSION [ 10.443775] iwlwifi 0000:3b:00.0: 0x0000A503 | FSEQ_OTP_VERSION [ 10.443912] iwlwifi 0000:3b:00.0: 0x80000003 | FSEQ_TOP_CONTENT_VERSION [ 10.443958] iwlwifi 0000:3b:00.0: 0x4552414E | FSEQ_ALIVE_TOKEN [ 10.444011] iwlwifi 0000:3b:00.0: 0x00100530 | FSEQ_CNVI_ID [ 10.444062] iwlwifi 0000:3b:00.0: 0x00000532 | FSEQ_CNVR_ID [ 10.444113] iwlwifi 0000:3b:00.0: 0x00100530 | CNVI_AUX_MISC_CHIP [ 10.444166] iwlwifi 0000:3b:00.0: 0x00000532 | CNVR_AUX_MISC_CHIP [ 10.444220] iwlwifi 0000:3b:00.0: 0x05B0905B | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM [ 10.444275] iwlwifi 0000:3b:00.0: 0x0000025B | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR [ 10.445696] iwlwifi 0000:3b:00.0: Collecting data: trigger 2 fired. [ 10.445710] iwlwifi 0000:3b:00.0: FW error in SYNC CMD RFH_QUEUE_CONFIG_CMD [ 10.445873] iwlwifi 0000:3b:00.0: Failed to configure RX queues: -5 that has been seen on several AX200/9462 devices running in a Xen HVM domain with PCI passthrough [0][1]. It can also be seen natively with a Killer AX1650x by coaxing the value of num_rx_queues to 1 in iwl_pcie_set_interrupt_capa. Fix this by returning early from iwl_configure_rxq whenever num_rx_queues is 1. [0] https://github.com/QubesOS/qubes-issues/issues/5616 [1] https://lore.kernel.org/linux-wireless/3cab5072-17a2-4d9a-2077-93788971c6c4@xxxxxxxxxxxxxxxxxxxxxx/T/ Signed-off-by: Connor Davis <connojd@xxxxxxxxxxxxxx> --- drivers/net/wireless/intel/iwlwifi/mvm/fw.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c index 95a613537047..36066a11f835 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c @@ -132,6 +132,9 @@ static int iwl_configure_rxq(struct iwl_mvm *mvm) .dataflags[0] = IWL_HCMD_DFL_NOCOPY, }; + if (mvm->trans->num_rx_queues == 1) + return 0; + /* Do not configure default queue, it is configured via context info */ num_queues = mvm->trans->num_rx_queues - 1; -- 2.25.1
