From b2afee5fd851ed883ebc36ce3498ed285553c109 Mon Sep 17 00:00:00 2001 From: San Mehat Date: Mon, 23 Mar 2009 12:20:37 -0700 Subject: [PATCH 063/696] mmc: core: Hold a wake lock accross delayed work + mmc rescan Signed-off-by: San Mehat 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 --- 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 ce93bf6..e01daef 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include @@ -39,6 +40,7 @@ #include "sdio_ops.h" static struct workqueue_struct *workqueue; +static struct wake_lock mmc_delayed_work_wake_lock; /* * Enabling software CRCs on the data blocks can be a significant (30%) @@ -71,6 +73,7 @@ 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); } @@ -1568,6 +1571,7 @@ 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; @@ -1606,14 +1610,20 @@ 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); } @@ -1899,6 +1909,9 @@ 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; @@ -1919,6 +1932,7 @@ unregister_bus: mmc_unregister_bus(); destroy_workqueue: destroy_workqueue(workqueue); + wake_lock_destroy(&mmc_delayed_work_wake_lock); return ret; } @@ -1929,6 +1943,7 @@ 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); -- 1.7.1