From 08f0d23d97dcb49ca7ba65a3fc714a5d28a91d0c Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Thu, 10 Dec 2015 15:47:11 +0200 Subject: [PATCH] iwlwifi: avoid d0i3 commands when no/init ucode is loaded d0i3 commands are not supported in the init image, so take a reference to ensure we don't enter d0i3 during init image, and additional checks to prevent d0i3 commands when no fw image is loaded. Add a few WARN_ON_ONCE to the d0i3 enter/exit commands to ensure we send d0i3 commands only when the normal ucode is loaded. Signed-off-by: Eliad Peller Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c | 1 + drivers/net/wireless/intel/iwlwifi/mvm/mvm.h | 1 + drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 8 ++++++++ 3 files changed, 10 insertions(+) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c index 7e2a8149411c..9ce7587e329d 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c @@ -1316,6 +1316,7 @@ static ssize_t iwl_dbgfs_d0i3_refs_read(struct file *file, PRINT_MVM_REF(IWL_MVM_REF_EXIT_WORK); PRINT_MVM_REF(IWL_MVM_REF_PROTECT_CSA); PRINT_MVM_REF(IWL_MVM_REF_FW_DBG_COLLECT); + PRINT_MVM_REF(IWL_MVM_REF_INIT_UCODE); return simple_read_from_buffer(user_buf, count, ppos, buf, pos); } diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h index 612799a889db..3f0db29d5d56 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h @@ -294,6 +294,7 @@ enum iwl_mvm_ref_type { IWL_MVM_REF_EXIT_WORK, IWL_MVM_REF_PROTECT_CSA, IWL_MVM_REF_FW_DBG_COLLECT, + IWL_MVM_REF_INIT_UCODE, /* update debugfs.c when changing this */ diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c index 958984cc4d2e..31c16a185001 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c @@ -603,9 +603,11 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg, goto out_free; mutex_lock(&mvm->mutex); + iwl_mvm_ref(mvm, IWL_MVM_REF_INIT_UCODE); err = iwl_run_init_mvm_ucode(mvm, true); if (!err || !iwlmvm_mod_params.init_dbg) iwl_trans_stop_device(trans); + iwl_mvm_unref(mvm, IWL_MVM_REF_INIT_UCODE); mutex_unlock(&mvm->mutex); /* returns 0 if successful, 1 if success but in rfkill */ if (err < 0 && !iwlmvm_mod_params.init_dbg) { @@ -1213,6 +1215,9 @@ int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode) IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n"); + if (WARN_ON_ONCE(mvm->cur_ucode != IWL_UCODE_REGULAR)) + return -EINVAL; + set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status); /* @@ -1420,6 +1425,9 @@ int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm) IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n"); + if (WARN_ON_ONCE(mvm->cur_ucode != IWL_UCODE_REGULAR)) + return -EINVAL; + mutex_lock(&mvm->d0i3_suspend_mutex); if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) { IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n"); -- 2.20.1