From 1efc3843a4ee1331bc20df685a79b47fa0f547d2 Mon Sep 17 00:00:00 2001 From: Golan Ben Ami Date: Tue, 12 Sep 2017 12:32:25 +0300 Subject: [PATCH] iwlwifi: stop dbgc recording before stopping DMA Today we stop the device and the DMA without stopping the dbgc recording before. This causes host crashes when the DMA rate is high. Stop dbgc recording when clearing the fw debug configuration to fix this. Signed-off-by: Golan Ben Ami Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 7 ++----- drivers/net/wireless/intel/iwlwifi/fw/dbg.h | 15 +++++++++++++++ 2 files changed, 17 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c index 6afc7a799892..f5dd7d83cd0a 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c @@ -1086,7 +1086,7 @@ void iwl_fw_error_dump_wk(struct work_struct *work) if (fwrt->trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) { /* stop recording */ - iwl_set_bits_prph(fwrt->trans, MON_BUFF_SAMPLE_CTL, 0x100); + iwl_fw_dbg_stop_recording(fwrt); iwl_fw_error_dump(fwrt); @@ -1104,10 +1104,7 @@ void iwl_fw_error_dump_wk(struct work_struct *work) u32 in_sample = iwl_read_prph(fwrt->trans, DBGC_IN_SAMPLE); u32 out_ctrl = iwl_read_prph(fwrt->trans, DBGC_OUT_CTRL); - /* stop recording */ - iwl_write_prph(fwrt->trans, DBGC_IN_SAMPLE, 0); - udelay(100); - iwl_write_prph(fwrt->trans, DBGC_OUT_CTRL, 0); + iwl_fw_dbg_stop_recording(fwrt); /* wait before we collect the data till the DBGC stop */ udelay(500); diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.h b/drivers/net/wireless/intel/iwlwifi/fw/dbg.h index 0f810ea89d31..9c889a32fe24 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.h +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.h @@ -68,6 +68,8 @@ #include #include #include "runtime.h" +#include "iwl-prph.h" +#include "iwl-io.h" #include "file.h" #include "error-dump.h" @@ -194,8 +196,21 @@ _iwl_fw_dbg_trigger_simple_stop(struct iwl_fw_runtime *fwrt, iwl_fw_dbg_get_trigger((fwrt)->fw,\ (trig))) +static inline void iwl_fw_dbg_stop_recording(struct iwl_fw_runtime *fwrt) +{ + if (fwrt->trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) { + iwl_set_bits_prph(fwrt->trans, MON_BUFF_SAMPLE_CTL, 0x100); + } else { + iwl_write_prph(fwrt->trans, DBGC_IN_SAMPLE, 0); + udelay(100); + iwl_write_prph(fwrt->trans, DBGC_OUT_CTRL, 0); + } +} + static inline void iwl_fw_dump_conf_clear(struct iwl_fw_runtime *fwrt) { + iwl_fw_dbg_stop_recording(fwrt); + fwrt->dump.conf = FW_DBG_INVALID; } -- 2.20.1