6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx> [ Upstream commit 094513f8a2fbddee51b055d8035f995551f98fce ] When the firmware crashes, we first told the op_mode and only then, changed the transport's state. This is a problem if the op_mode's nic_error() handler needs to send a host command: it'll see that the transport's state still reflects that the firmware is alive. Today, this has no consequences since we set the STATUS_FW_ERROR bit and that will prevent sending host commands. iwl_fw_dbg_stop_restart_recording looks at this bit to know not to send a host command for example. To fix the hibernation, we needed to reset the firmware without having an error and checking STATUS_FW_ERROR to see whether the firmware is alive will no longer hold, so this change is necessary as well. Change the flow a bit. Change trans->state before calling the op_mode's nic_error() method and check trans->state instead of STATUS_FW_ERROR. This will keep the current behavior of iwl_fw_dbg_stop_restart_recording upon firmware error, and it'll allow us to call iwl_fw_dbg_stop_restart_recording safely even if STATUS_FW_ERROR is clear, but yet, the firmware is not alive. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx> Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx> Link: https://patch.msgid.link/20240825191257.9d7427fbdfd7.Ia056ca57029a382c921d6f7b6a6b28fc480f2f22@changeid [I missed this was a dependency for the hibernation fix, changed the commit message a bit accordingly] Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 2 +- drivers/net/wireless/intel/iwlwifi/iwl-trans.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c index 3b0ed1cdfa11e..7fadaec777cea 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c @@ -3131,7 +3131,7 @@ void iwl_fw_dbg_stop_restart_recording(struct iwl_fw_runtime *fwrt, { int ret __maybe_unused = 0; - if (test_bit(STATUS_FW_ERROR, &fwrt->trans->status)) + if (!iwl_trans_fw_running(fwrt->trans)) return; if (fw_has_capa(&fwrt->fw->ucode_capa, diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h index 70022cadee35b..ad29663a356be 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h @@ -1472,8 +1472,8 @@ static inline void iwl_trans_fw_error(struct iwl_trans *trans, bool sync) /* prevent double restarts due to the same erroneous FW */ if (!test_and_set_bit(STATUS_FW_ERROR, &trans->status)) { - iwl_op_mode_nic_error(trans->op_mode, sync); trans->state = IWL_TRANS_NO_FW; + iwl_op_mode_nic_error(trans->op_mode, sync); } } -- 2.43.0
