Currently, ASPM is disabled for all WLAN+BT combo chipsets
when BTCOEX is enabled. This is incorrect since the workaround
is required only for WB195, which is a AR9285+AR3011 combo
solution. Fix this by checking for the HW version when enabling
the workaround.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/pci.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c
index a8f6126..c0c5996 100644
--- a/drivers/net/wireless/ath/ath9k/pci.c
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -128,8 +128,9 @@ static void ath_pci_aspm_init(struct ath_common *common)
if (!parent)
return;
- if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
- /* Bluetooth coexistance requires disabling ASPM. */
+ if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) &&
+ (AR_SREV_9285(ah))) {
+ /* Bluetooth coexistance requires disabling ASPM for AR9285. */
pci_read_config_byte(pdev, pos + PCI_EXP_LNKCTL, &aspm);
aspm &= ~(PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1);
pci_write_config_byte(pdev, pos + PCI_EXP_LNKCTL, aspm);
--
1.7.12
--
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