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ath9k: use per-device struct for pm_qos_* operations

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The ath9k driver uses a shared pm_qos_request_list structure for all
devices. This causes the following warning if more than one device is
present in the system:

WARNING: at kernel/pm_qos_params.c:234 ath9k_init_device+0x5e8/0x6b0()
pm_qos_add_request() called for already added request
Modules linked in:
Call Trace:
[<802b1cdc>] dump_stack+0x8/0x34
[<8007dd90>] warn_slowpath_common+0x78/0xa4
[<8007de44>] warn_slowpath_fmt+0x2c/0x38
[<801b0828>] ath9k_init_device+0x5e8/0x6b0
[<801bc508>] ath_pci_probe+0x2dc/0x39c
[<80176254>] pci_device_probe+0x64/0xa4
[<8019471c>] driver_probe_device+0xbc/0x188
[<80194854>] __driver_attach+0x6c/0xa4
[<80193e20>] bus_for_each_dev+0x60/0xb0
[<80193580>] bus_add_driver+0xcc/0x268
[<80194c08>] driver_register+0xe0/0x198
[<801764e0>] __pci_register_driver+0x50/0xe0
[<80365f48>] ath9k_init+0x3c/0x6c
[<8006050c>] do_one_initcall+0xfc/0x1d8
[<80355340>] kernel_init+0xd4/0x174
[<800639a4>] kernel_thread_helper+0x10/0x18

---[ end trace 5345fc6f870564a6 ]---

This patch fixes that warning by using a separate pm_qos_request_list
sructure for each device.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Gabor Juhos 2010-11-25 18:26:07 +01:00 committed by John W. Linville
parent 16ccdf0dbc
commit 98c316e348
3 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/wireless/ath/ath9k/ath9k.h
View File

@ -21,6 +21,7 @@
#include <linux/device.h>
#include <linux/leds.h>
#include <linux/completion.h>
#include <linux/pm_qos_params.h>
#include "debug.h"
#include "common.h"
@ -646,6 +647,8 @@ struct ath_softc {
struct ath_descdma txsdma;
struct ath_ant_comb ant_comb;
struct pm_qos_request_list pm_qos_req;
};
struct ath_wiphy {
@ -675,7 +678,6 @@ static inline void ath_read_cachesize(struct ath_common *common, int *csz)
}
extern struct ieee80211_ops ath9k_ops;
extern struct pm_qos_request_list ath9k_pm_qos_req;
extern int modparam_nohwcrypt;
extern int led_blink;

7
drivers/net/wireless/ath/ath9k/init.c
View File

@ -15,7 +15,6 @@
*/
#include <linux/slab.h>
#include <linux/pm_qos_params.h>
#include "ath9k.h"
@ -180,8 +179,6 @@ static const struct ath_ops ath9k_common_ops = {
.write = ath9k_iowrite32,
};
struct pm_qos_request_list ath9k_pm_qos_req;
/**************************/
/* Initialization */
/**************************/
@ -759,7 +756,7 @@ 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_add_request(&sc->pm_qos_req, PM_QOS_CPU_DMA_LATENCY,
PM_QOS_DEFAULT_VALUE);
return 0;
@ -830,7 +827,7 @@ void ath9k_deinit_device(struct ath_softc *sc)
}
ieee80211_unregister_hw(hw);
pm_qos_remove_request(&ath9k_pm_qos_req);
pm_qos_remove_request(&sc->pm_qos_req);
ath_rx_cleanup(sc);
ath_tx_cleanup(sc);
ath9k_deinit_softc(sc);

5
drivers/net/wireless/ath/ath9k/main.c
View File

@ -15,7 +15,6 @@
*/
#include <linux/nl80211.h>
#include <linux/pm_qos_params.h>
#include "ath9k.h"
#include "btcoex.h"
@ -1244,7 +1243,7 @@ static int ath9k_start(struct ieee80211_hw *hw)
ath9k_btcoex_timer_resume(sc);
}
pm_qos_update_request(&ath9k_pm_qos_req, 55);
pm_qos_update_request(&sc->pm_qos_req, 55);
mutex_unlock:
mutex_unlock(&sc->mutex);
@ -1423,7 +1422,7 @@ static void ath9k_stop(struct ieee80211_hw *hw)
sc->sc_flags |= SC_OP_INVALID;
pm_qos_update_request(&ath9k_pm_qos_req, PM_QOS_DEFAULT_VALUE);
pm_qos_update_request(&sc->pm_qos_req, PM_QOS_DEFAULT_VALUE);
mutex_unlock(&sc->mutex);