diff options
| author | San Mehat <san@android.com> | 2009-03-23 12:20:37 -0700 |
|---|---|---|
| committer | Arve Hjønnevåg <arve@android.com> | 2013-07-01 13:40:23 -0700 |
| commit | 57fa81bd6751fab71d83e9a8ea987d5f0e1a7e90 (patch) | |
| tree | b2a5935850c37716c0c61db3739ef15573e48000 /drivers/mmc | |
| parent | 9abeb46f016b75e0c821dd45a89feb4947fb083a (diff) | |
mmc: core: Hold a wake lock accross delayed work + mmc rescan
Signed-off-by: San Mehat <san@android.com>
mmc: core: Rework mmc_delayed_work wakelock so that the wakelock is only extended if a card is added or removed.
Signed-off-by: San Mehat <san@google.com>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/core.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index c57a28311df..5db69d8849d 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -27,6 +27,7 @@ #include <linux/fault-inject.h> #include <linux/random.h> #include <linux/slab.h> +#include <linux/wakelock.h> #include <linux/mmc/card.h> #include <linux/mmc/host.h> @@ -52,6 +53,7 @@ #define MMC_BKOPS_MAX_TIMEOUT (4 * 60 * 1000) /* max time to wait in ms */ static struct workqueue_struct *workqueue; +static struct wake_lock mmc_delayed_work_wake_lock; static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; /* @@ -85,6 +87,7 @@ MODULE_PARM_DESC( static int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay) { + wake_lock(&mmc_delayed_work_wake_lock); return queue_delayed_work(workqueue, work, delay); } @@ -2351,6 +2354,7 @@ void mmc_rescan(struct work_struct *work) struct mmc_host *host = container_of(work, struct mmc_host, detect.work); int i; + bool extend_wakelock = false; if (host->rescan_disable) return; @@ -2400,14 +2404,20 @@ void mmc_rescan(struct work_struct *work) mmc_claim_host(host); for (i = 0; i < ARRAY_SIZE(freqs); i++) { - if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) + if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) { + extend_wakelock = true; break; + } if (freqs[i] <= host->f_min) break; } mmc_release_host(host); out: + if (extend_wakelock) + wake_lock_timeout(&mmc_delayed_work_wake_lock, HZ / 2); + else + wake_unlock(&mmc_delayed_work_wake_lock); if (host->caps & MMC_CAP_NEEDS_POLL) mmc_schedule_delayed_work(&host->detect, HZ); } @@ -2813,6 +2823,9 @@ static int __init mmc_init(void) if (!workqueue) return -ENOMEM; + wake_lock_init(&mmc_delayed_work_wake_lock, WAKE_LOCK_SUSPEND, + "mmc_delayed_work"); + ret = mmc_register_bus(); if (ret) goto destroy_workqueue; @@ -2833,6 +2846,7 @@ unregister_bus: mmc_unregister_bus(); destroy_workqueue: destroy_workqueue(workqueue); + wake_lock_destroy(&mmc_delayed_work_wake_lock); return ret; } @@ -2843,6 +2857,7 @@ static void __exit mmc_exit(void) mmc_unregister_host_class(); mmc_unregister_bus(); destroy_workqueue(workqueue); + wake_lock_destroy(&mmc_delayed_work_wake_lock); } subsys_initcall(mmc_init); |