Subject: [PATCH] ath9k: Disable ASPM when btcoex is active

Signed-off-by: Vasanthakumar Thiagarajan <[email protected]>
---
drivers/net/wireless/ath/ath9k/hw.c | 14 ++++++++++++++
drivers/net/wireless/ath/ath9k/hw.h | 5 +++++
drivers/net/wireless/ath/ath9k/main.c | 1 +
3 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 011b14f..97a09db 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -16,6 +16,7 @@

#include <linux/io.h>
#include <asm/unaligned.h>
+#include <linux/pci.h>

#include "ath9k.h"
#include "initvals.h"
@@ -4298,3 +4299,16 @@ void ath_gen_timer_isr(struct ath_hw *ah)
timer->trigger(timer->arg);
}
}
+
+/*
+ * Primitive to disable ASPM
+ */
+void ath_pcie_aspm_disable(struct ath_softc *sc)
+{
+ struct pci_dev *pdev = to_pci_dev(sc->dev);
+ u8 aspm;
+
+ pci_read_config_byte(pdev, ATH_PCIE_CAP_LINK_CTRL, &aspm);
+ aspm &= ~(ATH_PCIE_CAP_LINK_L0S | ATH_PCIE_CAP_LINK_L1);
+ pci_write_config_byte(pdev, ATH_PCIE_CAP_LINK_CTRL, aspm);
+}
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 5ca6ffa..a592f1a 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -665,4 +665,9 @@ void ath_gen_timer_free(struct ath_hw *ah, struct ath_gen_timer *timer);
void ath_gen_timer_isr(struct ath_hw *hw);
u32 ath9k_hw_gettsf32(struct ath_hw *ah);

+#define ATH_PCIE_CAP_LINK_CTRL 0x70
+#define ATH_PCIE_CAP_LINK_L0S 1
+#define ATH_PCIE_CAP_LINK_L1 2
+
+void ath_pcie_aspm_disable(struct ath_softc *sc);
#endif
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index a69fda8..ce011ab 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -2010,6 +2010,7 @@ static int ath9k_start(struct ieee80211_hw *hw)
AR_STOMP_LOW_WLAN_WGHT);
ath9k_hw_btcoex_enable(sc->sc_ah);

+ ath_pcie_aspm_disable(sc);
if (sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_3WIRE)
ath_btcoex_timer_resume(sc, &sc->btcoex_info);
}
--
1.5.5.1



Subject: [PATCH] ath9k: Remove unnecessary casting to u8 in pci_read_config_byte() call

Signed-off-by: Vasanthakumar Thiagarajan <[email protected]>
---
drivers/net/wireless/ath/ath9k/pci.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c
index 8bb286d..8b28814 100644
--- a/drivers/net/wireless/ath/ath9k/pci.c
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -35,8 +35,7 @@ static void ath_pci_read_cachesize(struct ath_softc *sc, int *csz)
{
u8 u8tmp;

- pci_read_config_byte(to_pci_dev(sc->dev), PCI_CACHE_LINE_SIZE,
- (u8 *)&u8tmp);
+ pci_read_config_byte(to_pci_dev(sc->dev), PCI_CACHE_LINE_SIZE, &u8tmp);
*csz = (int)u8tmp;

/*
--
1.5.5.1