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OpenCloudOS-Kernel
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32 

Pull AVR32 fix from Hans-Christian Egtvedt.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32:
  avr32: handle NULL as a valid clock object
This commit is contained in:
Linus Torvalds 2015-07-28 10:29:23 -07:00
parent 02ff371afd 5c02a42065
commit 67eb890e5e
1 changed files with 19 additions and 1 deletions
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20
arch/avr32/mach-at32ap/clock.c
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@ -80,6 +80,9 @@ int clk_enable(struct clk *clk)
{
unsigned long flags;
if (!clk)
return 0;
spin_lock_irqsave(&clk_lock, flags);
__clk_enable(clk);
spin_unlock_irqrestore(&clk_lock, flags);
@ -106,6 +109,9 @@ void clk_disable(struct clk *clk)
{
unsigned long flags;
if (IS_ERR_OR_NULL(clk))
return;
spin_lock_irqsave(&clk_lock, flags);
__clk_disable(clk);
spin_unlock_irqrestore(&clk_lock, flags);
@ -117,6 +123,9 @@ unsigned long clk_get_rate(struct clk *clk)
unsigned long flags;
unsigned long rate;
if (!clk)
return 0;
spin_lock_irqsave(&clk_lock, flags);
rate = clk->get_rate(clk);
spin_unlock_irqrestore(&clk_lock, flags);
@ -129,6 +138,9 @@ long clk_round_rate(struct clk *clk, unsigned long rate)
{
unsigned long flags, actual_rate;
if (!clk)
return 0;
if (!clk->set_rate)
return -ENOSYS;
@ -145,6 +157,9 @@ int clk_set_rate(struct clk *clk, unsigned long rate)
unsigned long flags;
long ret;
if (!clk)
return 0;
if (!clk->set_rate)
return -ENOSYS;
@ -161,6 +176,9 @@ int clk_set_parent(struct clk *clk, struct clk *parent)
unsigned long flags;
int ret;
if (!clk)
return 0;
if (!clk->set_parent)
return -ENOSYS;
@ -174,7 +192,7 @@ EXPORT_SYMBOL(clk_set_parent);
struct clk *clk_get_parent(struct clk *clk)
{
return clk->parent;
return !clk ? NULL : clk->parent;
}
EXPORT_SYMBOL(clk_get_parent);