[ Upstream commit fc838c775f35e272e5cc7ef43853f0b55babbe37 ] The driver should delay only in recording stop flow between writing to DBGC_IN_SAMPLE register and DBGC_OUT_CTRL register. Any other delay is not needed.
Change the following: 1. Remove any unnecessary delays in the flow 2. Increase the delay in the stop recording flow since 100 micro is not enough 3. Use usleep_range instead of delay since the driver is allowed to sleep in this flow. Signed-off-by: Shahar S Matityahu <[email protected]> Fixes: 5cfe79c8d92a ("iwlwifi: fw: stop and start debugging using host command") Signed-off-by: Luca Coelho <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 2 -- drivers/net/wireless/intel/iwlwifi/fw/dbg.h | 6 ++++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c index 33d7bc5500db..c875e173771c 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c @@ -2303,8 +2303,6 @@ void iwl_fw_dbg_collect_sync(struct iwl_fw_runtime *fwrt) /* start recording again if the firmware is not crashed */ if (!test_bit(STATUS_FW_ERROR, &fwrt->trans->status) && fwrt->fw->dbg.dest_tlv) { - /* wait before we collect the data till the DBGC stop */ - udelay(500); iwl_fw_dbg_restart_recording(fwrt, ¶ms); } } diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.h b/drivers/net/wireless/intel/iwlwifi/fw/dbg.h index fd0ad220e961..c5c015a66106 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.h +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.h @@ -294,7 +294,10 @@ _iwl_fw_dbg_stop_recording(struct iwl_trans *trans, } iwl_write_umac_prph(trans, DBGC_IN_SAMPLE, 0); - udelay(100); + /* wait for the DBGC to finish writing the internal buffer to DRAM to + * avoid halting the HW while writing + */ + usleep_range(700, 1000); iwl_write_umac_prph(trans, DBGC_OUT_CTRL, 0); #ifdef CONFIG_IWLWIFI_DEBUGFS trans->dbg_rec_on = false; @@ -324,7 +327,6 @@ _iwl_fw_dbg_restart_recording(struct iwl_trans *trans, iwl_set_bits_prph(trans, MON_BUFF_SAMPLE_CTL, 0x1); } else { iwl_write_umac_prph(trans, DBGC_IN_SAMPLE, params->in_sample); - udelay(100); iwl_write_umac_prph(trans, DBGC_OUT_CTRL, params->out_ctrl); } } -- 2.20.1
