[PATCH 4.9 201/310] iwlwifi: pcie: only use d0i3 in suspend/resume if system_pm is set to d0i3

From: Greg Kroah-Hartman
Date: Wed Apr 11 2018 - 15:37:14 EST


4.9-stable review patch. If anyone has any objections, please let me know.

------------------

From: Luca Coelho <luciano.coelho@xxxxxxxxx>


[ Upstream commit e4c49c4937951de1cdbe35572ade40c948dec1e1 ]

We only need to handle d0i3 entry and exit during suspend resume if
system_pm is set to IWL_PLAT_PM_MODE_D0I3, otherwise d0i3 entry
failures will cause suspend to fail.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=194791

Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
@@ -2824,7 +2824,8 @@ static struct iwl_trans_dump_data
#ifdef CONFIG_PM_SLEEP
static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
{
- if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3)
+ if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3 &&
+ (trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3))
return iwl_pci_fw_enter_d0i3(trans);

return 0;
@@ -2832,7 +2833,8 @@ static int iwl_trans_pcie_suspend(struct

static void iwl_trans_pcie_resume(struct iwl_trans *trans)
{
- if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3)
+ if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3 &&
+ (trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3))
iwl_pci_fw_exit_d0i3(trans);
}
#endif /* CONFIG_PM_SLEEP */