diff options
| author | Vivek Natarajan <vnatarajan@atheros.com> | 2010-10-30 22:05:13 +0530 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-11-08 16:53:46 -0500 |
| commit | 10598c124ecabbbfd7522f74de19b8f7d52a1bee (patch) | |
| tree | 6cc409c018b6ee401e3fb3d4196fcc1e03b0e866 /drivers/net/wireless/ath/ath9k/init.c | |
| parent | 5f841b4130a639e5f0fbcf4a9b26045d734e4ee6 (diff) | |
| download | lwn-10598c124ecabbbfd7522f74de19b8f7d52a1bee.tar.gz lwn-10598c124ecabbbfd7522f74de19b8f7d52a1bee.zip | |
ath9k: Fix a DMA latency issue for Intel Pinetrail platforms.
Throughput was severely affected in Intel Pinetrail platforms
because of a DMA problem in C3 state. This patch fixes this
issue.
Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
CC: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/init.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/init.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c index 95b41db0d86b..6a0d99eff404 100644 --- a/drivers/net/wireless/ath/ath9k/init.c +++ b/drivers/net/wireless/ath/ath9k/init.c @@ -15,6 +15,7 @@ */ #include <linux/slab.h> +#include <linux/pm_qos_params.h> #include "ath9k.h" @@ -179,6 +180,8 @@ static const struct ath_ops ath9k_common_ops = { .write = ath9k_iowrite32, }; +struct pm_qos_request_list ath9k_pm_qos_req; + /**************************/ /* Initialization */ /**************************/ @@ -756,6 +759,9 @@ int ath9k_init_device(u16 devid, struct ath_softc *sc, u16 subsysid, ath_init_leds(sc); ath_start_rfkill_poll(sc); + pm_qos_add_request(&ath9k_pm_qos_req, PM_QOS_CPU_DMA_LATENCY, + PM_QOS_DEFAULT_VALUE); + return 0; error_world: @@ -811,6 +817,8 @@ void ath9k_deinit_device(struct ath_softc *sc) ath9k_ps_wakeup(sc); + pm_qos_remove_request(&ath9k_pm_qos_req); + wiphy_rfkill_stop_polling(sc->hw->wiphy); ath_deinit_leds(sc); |