From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mga09.intel.com ([134.134.136.24]:42471 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754336AbbAVUdr (ORCPT ); Thu, 22 Jan 2015 15:33:47 -0500 From: Emmanuel Grumbach To: linux-wireless@vger.kernel.org Cc: Emmanuel Grumbach Subject: [PATCH 07/38] iwlwifi: mvm: allow to collect debug data from non-sleepable context Date: Thu, 22 Jan 2015 22:32:58 +0200 Message-Id: <1421958809-3371-7-git-send-email-emmanuel.grumbach@intel.com> (sfid-20150122_213402_528931_09F5875E) In-Reply-To: <1421958313.6424.2.camel@egrumbacBox> References: <1421958313.6424.2.camel@egrumbacBox> Sender: linux-wireless-owner@vger.kernel.org List-ID: iwl_mvm_fw_dbg_collect allows to collect debug data from the firmware. Most of the firmware interaction is done in non-sleepable context. It makes little sense to force the caller of iwl_mvm_fw_dbg_collect to sleep. Defer the actual collection to a worker so that this function will be able to be called from any context. Reviewed-by: Eran Harary Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/mvm/fw.c | 8 +------- drivers/net/wireless/iwlwifi/mvm/ops.c | 6 ++++++ 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/mvm/fw.c b/drivers/net/wireless/iwlwifi/mvm/fw.c index 534ee31..52338b7 100644 --- a/drivers/net/wireless/iwlwifi/mvm/fw.c +++ b/drivers/net/wireless/iwlwifi/mvm/fw.c @@ -402,8 +402,6 @@ out: void iwl_mvm_fw_dbg_collect(struct iwl_mvm *mvm) { - lockdep_assert_held(&mvm->mutex); - /* stop recording */ if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) { iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100); @@ -412,11 +410,7 @@ void iwl_mvm_fw_dbg_collect(struct iwl_mvm *mvm) iwl_write_prph(mvm->trans, DBGC_OUT_CTRL, 0); } - iwl_mvm_fw_error_dump(mvm); - - /* start recording again */ - WARN_ON_ONCE(mvm->fw->dbg_dest_tlv && - iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf)); + schedule_work(&mvm->fw_error_dump_wk); } int iwl_mvm_start_fw_dbg_conf(struct iwl_mvm *mvm, enum iwl_fw_dbg_conf conf_id) diff --git a/drivers/net/wireless/iwlwifi/mvm/ops.c b/drivers/net/wireless/iwlwifi/mvm/ops.c index 12b565a..90143aa 100644 --- a/drivers/net/wireless/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/iwlwifi/mvm/ops.c @@ -825,6 +825,12 @@ static void iwl_mvm_fw_error_dump_wk(struct work_struct *work) mutex_lock(&mvm->mutex); iwl_mvm_fw_error_dump(mvm); + + /* start recording again if the firmware is not crashed */ + WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) && + mvm->fw->dbg_dest_tlv && + iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf)); + mutex_unlock(&mvm->mutex); iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT); -- 1.9.1