From: Emmanuel Grumbach Date: Mon, 29 Jul 2013 20:05:18 +0000 (+0300) Subject: iwlwifi: pcie: disable L1 Active after pci_enable_device X-Git-Tag: firefly_0821_release~6453^2~960 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=67bdd3c0dc4dc00fc1e708fc9f326304d88cc8be;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c index 50ba0a468f94..aeb70e13137a 100644 --- 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));