diff options
| author | Takashi Iwai <tiwai@suse.de> | 2012-10-30 11:08:25 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2012-10-30 11:08:25 +0100 |
| commit | a5d00dc3a4b65ed38249f3225e453944c633747b (patch) | |
| tree | 6249ca5a5f13059f42890525a9ea7133778f3891 /arch/arm/mach-omap2/clockdomain.c | |
| parent | 1a8506d4402b6e96c2ed778dc7ccbb48d1e02fce (diff) | |
| parent | 0914f7961babbf28aaa2f19b453951fb4841c03f (diff) | |
Merge branch 'for-linus' into for-next
... for migrating the core changes for USB-audio disconnection fixes
Diffstat (limited to 'arch/arm/mach-omap2/clockdomain.c')
| -rw-r--r-- | arch/arm/mach-omap2/clockdomain.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c index cbb879139c51..512e79a842cb 100644 --- a/arch/arm/mach-omap2/clockdomain.c +++ b/arch/arm/mach-omap2/clockdomain.c @@ -925,15 +925,18 @@ static int _clkdm_clk_hwmod_enable(struct clockdomain *clkdm) if (!clkdm || !arch_clkdm || !arch_clkdm->clkdm_clk_enable) return -EINVAL; + spin_lock_irqsave(&clkdm->lock, flags); + /* * For arch's with no autodeps, clkcm_clk_enable * should be called for every clock instance or hwmod that is * enabled, so the clkdm can be force woken up. */ - if ((atomic_inc_return(&clkdm->usecount) > 1) && autodeps) + if ((atomic_inc_return(&clkdm->usecount) > 1) && autodeps) { + spin_unlock_irqrestore(&clkdm->lock, flags); return 0; + } - spin_lock_irqsave(&clkdm->lock, flags); arch_clkdm->clkdm_clk_enable(clkdm); pwrdm_state_switch(clkdm->pwrdm.ptr); spin_unlock_irqrestore(&clkdm->lock, flags); @@ -950,15 +953,19 @@ static int _clkdm_clk_hwmod_disable(struct clockdomain *clkdm) if (!clkdm || !arch_clkdm || !arch_clkdm->clkdm_clk_disable) return -EINVAL; + spin_lock_irqsave(&clkdm->lock, flags); + if (atomic_read(&clkdm->usecount) == 0) { + spin_unlock_irqrestore(&clkdm->lock, flags); WARN_ON(1); /* underflow */ return -ERANGE; } - if (atomic_dec_return(&clkdm->usecount) > 0) + if (atomic_dec_return(&clkdm->usecount) > 0) { + spin_unlock_irqrestore(&clkdm->lock, flags); return 0; + } - spin_lock_irqsave(&clkdm->lock, flags); arch_clkdm->clkdm_clk_disable(clkdm); pwrdm_state_switch(clkdm->pwrdm.ptr); spin_unlock_irqrestore(&clkdm->lock, flags); |