From 54f315cb082bf98290575e858d1e0274bb0eebe0 Mon Sep 17 00:00:00 2001 From: Ido Yariv Date: Tue, 14 Jun 2016 10:27:57 -0400 Subject: [PATCH] iwlwifi: pcie: Enable MSI mode when using MSI interrupts On some of the chipsets MSI & INTA interrupts are disabled by default in the HW registers, and need to be explicitly enabled to be used. In case MSI-X isn't used, make sure MSI mode is enabled by setting the relevant HW register. Signed-off-by: Ido Yariv Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/iwl-prph.h | 1 + drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 6 +++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-prph.h b/drivers/net/wireless/intel/iwlwifi/iwl-prph.h index 6c1d20ded04b..459bf736fd5b 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-prph.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-prph.h @@ -417,5 +417,6 @@ enum { }; #define UREG_CHICK (0xA05C00) +#define UREG_CHICK_MSI_ENABLE BIT(24) #define UREG_CHICK_MSIX_ENABLE BIT(25) #endif /* __iwl_prph_h__ */ diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c index ac623c3e3f24..f5ace924e76a 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c @@ -1396,8 +1396,12 @@ static void iwl_pcie_init_msix(struct iwl_trans_pcie *trans_pcie) max_rx_vector = trans_pcie->allocated_vector - 1; - if (!trans_pcie->msix_enabled) + if (!trans_pcie->msix_enabled) { + if (trans->cfg->mq_rx_supported) + iwl_write_prph(trans, UREG_CHICK, + UREG_CHICK_MSI_ENABLE); return; + } iwl_write_prph(trans, UREG_CHICK, UREG_CHICK_MSIX_ENABLE);