iwlwifi: reset pci retry timeout

We removed resetting of PCI_RETRY_TIMEOUT register
in merge of suspend resume work.
'Suspend and resume' resets the PCI configuration space, so we
have to disable the RETRY_TIMEOUT register again here.

Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 1cbc22a180a7..1e11706dcf63 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -2930,6 +2930,12 @@ int iwl_pci_resume(struct pci_dev *pdev)
         struct iwl_priv *priv = pci_get_drvdata(pdev);
         int ret;
 
+        /*
+         * We disable the RETRY_TIMEOUT register (0x41) to keep
+         * PCI Tx retries from interfering with C3 CPU state.
+         */
+        pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
+
         pci_set_power_state(pdev, PCI_D0);
         ret = pci_enable_device(pdev);
         if (ret)