On some systems there are heavy crashes if the kernel config option CONFIG_PCIEASPM_PERFORMANCE is not set. Patch provided by Sujith for ath9k fixes this issue and the card operates without crashes with kernel default CONFIG_PCIEASPM_DEFAULT option that uses BIOS provided ASPM settings. Tested with QCA9862 mPCIe card.
Signed-off-by: Sujith Manoharan <[email protected]> Signed-off-by: Tomislav Požega <[email protected]> --- drivers/net/wireless/ath/ath10k/pci.c | 15 +++++++++++++-- 1 files changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c index 271f92c..e24403c 100644 --- a/drivers/net/wireless/ath/ath10k/pci.c +++ b/drivers/net/wireless/ath/ath10k/pci.c @@ -2787,14 +2787,25 @@ static int ath10k_pci_hif_power_up(struct ath10k *ar, enum ath10k_firmware_mode fw_mode) { struct ath10k_pci *ar_pci = ath10k_pci_priv(ar); + struct pci_dev *pdev = ar_pci->pdev; int ret; + u32 val; ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif power up\n"); - pcie_capability_read_word(ar_pci->pdev, PCI_EXP_LNKCTL, + if (ar->dev_id == QCA988X_2_0_DEVICE_ID) { + pci_read_config_dword(pdev, 0x70c, &val); + if ((val & 0xff000000) == 0x17000000) { + val &= 0x00ffffff; + val |= 0x27000000; + pci_write_config_dword(pdev, 0x570c, val); + } + } else { + pcie_capability_read_word(ar_pci->pdev, PCI_EXP_LNKCTL, &ar_pci->link_ctl); - pcie_capability_write_word(ar_pci->pdev, PCI_EXP_LNKCTL, + pcie_capability_write_word(ar_pci->pdev, PCI_EXP_LNKCTL, ar_pci->link_ctl & ~PCI_EXP_LNKCTL_ASPMC); + } /* * Bring the target up cleanly. -- 1.7.0.4
