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iwlwifi: avoid d0i3 commands when no/init ucode is loaded

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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 <eliadx.peller@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Eliad Peller 2015-12-10 15:47:11 +02:00 committed by Emmanuel Grumbach
parent 36be0eb62e
commit 08f0d23d97
3 changed files with 10 additions and 0 deletions
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1
drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
View File

@ -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);
}

1
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
View File

@ -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 */

8
drivers/net/wireless/intel/iwlwifi/mvm/ops.c
View File

@ -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");