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 <c_manoha@xxxxxxxxxxxxxxxx>
Signed-off-by: Tomislav Požega <pozega.tomislav@xxxxxxxxx>
---
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
