On Sat, Apr 12, 2014 at 6:11 PM, Alexander Monakov <amonakov@xxxxxxxxx> wrote:
> Hello,
>
> On a laptop with Wireless-N 135 card and 3.14.0 kernel I'm getting a
> kernel oops on cold boot ans wireless seems unusable, but suprisingly
> everything works fine after a reboot:
>
> [ 4.155609] Intel(R) Wireless WiFi driver for Linux, in-tree:
> [ 4.155611] Copyright(c) 2003- 2014 Intel Corporation
> [ 4.155745] iwlwifi 0000:05:00.0: can't disable ASPM; OS doesn't
> have ASPM control
> [ 4.155810] iwlwifi 0000:05:00.0: pci_enable_msi failed(0Xffffffda)
> [ 4.173755] iwlwifi 0000:05:00.0: RF_KILL bit toggled to enable radio.
> [ 4.173763] BUG: unable to handle kernel NULL pointer dereference
> at (null)
> [ 4.175243] IP: [<ffffffffa00057a0>]
> iwl_pcie_irq_handler+0xa10/0xb50 [iwlwifi]
> [ 4.176641] PGD 0
> [ 4.176874] iwlwifi 0000:05:00.0: loaded firmware version
> 18.168.6.1 op_mode iwldvm
> [ 4.179239] Oops: 0000 [#1] SMP
> [ 4.180623] Modules linked in: iwlwifi
>
Wow - interesting - you are getting an interrupt before we even enable them.
Does this help you?
diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c
b/drivers/net/wireless/iwlwifi/pcie/trans.c
index 37f7acc..bebab4e 100644
--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -1803,6 +1803,10 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct
pci_dev *pdev,
* PCI Tx retries from interfering with C3 CPU state */
pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
+ trans->dev = &pdev->dev;
+ trans_pcie->pci_dev = pdev;
+ iwl_disable_interrupts(trans);
+
err = pci_enable_msi(pdev);
if (err) {
dev_err(&pdev->dev, "pci_enable_msi failed(0X%x)\n", err);
@@ -1814,8 +1818,6 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct
pci_dev *pdev,
}
}
- trans->dev = &pdev->dev;
- trans_pcie->pci_dev = pdev;
trans->hw_rev = iwl_read32(trans, CSR_HW_REV);
trans->hw_id = (pdev->device << 16) + pdev->subsystem_device;
snprintf(trans->hw_id_str, sizeof(trans->hw_id_str),
--
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