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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-17 01:36:47 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-17 01:36:47 (GMT) |
| commit | 477de0de446210eb5c87e2a54c9ba4c8844fb98b (patch) | |
| tree | 399098973886cd595d33b375cefd022b9461c88c | |
| parent | b5e6ab589d570ac79cc939517fab05c87a23c262 (diff) | |
| parent | 86f315bbb2374f1f077500ad131dd9b71856e697 (diff) | |
| download | linux-477de0de446210eb5c87e2a54c9ba4c8844fb98b.tar.xz | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc:
Revert "mmc: fix a race between card-detect rescan and clock-gate work instances"
| -rw-r--r-- | drivers/mmc/core/host.c | 9 | ||||
| -rw-r--r-- | include/linux/mmc/host.h | 1 |
2 files changed, 6 insertions, 4 deletions
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 2b200c1..461e6a1 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -94,7 +94,7 @@ static void mmc_host_clk_gate_delayed(struct mmc_host *host) spin_unlock_irqrestore(&host->clk_lock, flags); return; } - mmc_claim_host(host); + mutex_lock(&host->clk_gate_mutex); spin_lock_irqsave(&host->clk_lock, flags); if (!host->clk_requests) { spin_unlock_irqrestore(&host->clk_lock, flags); @@ -104,7 +104,7 @@ static void mmc_host_clk_gate_delayed(struct mmc_host *host) pr_debug("%s: gated MCI clock\n", mmc_hostname(host)); } spin_unlock_irqrestore(&host->clk_lock, flags); - mmc_release_host(host); + mutex_unlock(&host->clk_gate_mutex); } /* @@ -130,7 +130,7 @@ void mmc_host_clk_ungate(struct mmc_host *host) { unsigned long flags; - mmc_claim_host(host); + mutex_lock(&host->clk_gate_mutex); spin_lock_irqsave(&host->clk_lock, flags); if (host->clk_gated) { spin_unlock_irqrestore(&host->clk_lock, flags); @@ -140,7 +140,7 @@ void mmc_host_clk_ungate(struct mmc_host *host) } host->clk_requests++; spin_unlock_irqrestore(&host->clk_lock, flags); - mmc_release_host(host); + mutex_unlock(&host->clk_gate_mutex); } /** @@ -215,6 +215,7 @@ static inline void mmc_host_clk_init(struct mmc_host *host) host->clk_gated = false; INIT_WORK(&host->clk_gate_work, mmc_host_clk_gate_work); spin_lock_init(&host->clk_lock); + mutex_init(&host->clk_gate_mutex); } /** diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index eb792cb..bcb793e 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -183,6 +183,7 @@ struct mmc_host { struct work_struct clk_gate_work; /* delayed clock gate */ unsigned int clk_old; /* old clock value cache */ spinlock_t clk_lock; /* lock for clk fields */ + struct mutex clk_gate_mutex; /* mutex for clock gating */ #endif /* host specific block data */ |