From 1aa02b5a33506387828f77eb607342a7dfa6beff Mon Sep 17 00:00:00 2001 From: Avri Altman Date: Wed, 29 Apr 2015 05:11:10 +0300 Subject: [PATCH] iwlwifi: pcie: don't disable the busmaster DMA clock for family 8000 Disabling the clocks is a standard procedure while stopping the device. On family 8000 however, disabling the bus master DMA clock increases the NIC's power consumption. To fix this, skip this call if the device family is IWL_DEVICE_FAMILY_8000. Signed-off-by: Avri Altman Reviewed-by: Johannes Berg Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/pcie/trans.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c index 47bbf57..d6f6515 100644 --- a/drivers/net/wireless/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/iwlwifi/pcie/trans.c @@ -1049,9 +1049,11 @@ static void iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power) iwl_pcie_rx_stop(trans); /* Power-down device's busmaster DMA clocks */ - iwl_write_prph(trans, APMG_CLK_DIS_REG, - APMG_CLK_VAL_DMA_CLK_RQT); - udelay(5); + if (trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) { + iwl_write_prph(trans, APMG_CLK_DIS_REG, + APMG_CLK_VAL_DMA_CLK_RQT); + udelay(5); + } } /* Make sure (redundant) we've released our request to stay awake */ -- 2.7.4