iwlwifi: pcie: disable L1 Active after pci_enable_device

commit eabc4ac5d7606a57ee2b7308cb7323ea8f60183b upstream.

As Arjan pointed out, we mustn't do anything related to PCI
configuration until the device is properly enabled with
pci_enable_device().

Reported-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c
index 50ba0a468f94baa59dede7d4c50c8a3a2f960b35..aeb70e13137abdc8eb99c7f539336cc2e830d667 100644 (file)
--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -1481,16 +1481,16 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
        spin_lock_init(&trans_pcie->reg_lock);
        init_waitqueue_head(&trans_pcie->ucode_write_waitq);
 
-       /* W/A - seems to solve weird behavior. We need to remove this if we
-        * don't want to stay in L1 all the time. This wastes a lot of power */
-       pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
-                              PCIE_LINK_STATE_CLKPM);
-
        if (pci_enable_device(pdev)) {
                err = -ENODEV;
                goto out_no_pci;
        }
 
+       /* W/A - seems to solve weird behavior. We need to remove this if we
+        * don't want to stay in L1 all the time. This wastes a lot of power */
+       pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
+                              PCIE_LINK_STATE_CLKPM);
+
        pci_set_master(pdev);
 
        err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));