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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2015-07-24 13:49:48 +0300
committerHans-Christian Egtvedt <egtvedt@samfundet.no>2015-07-27 09:14:07 +0200
commit5c02a4206538da12c040b51778d310df84c6bf6c (patch)
treef67b6b9c2da70b2dcca153aa5f3c0d7b0a14f6b1 /arch/avr32
parentcbfe8fa6cd672011c755c3cd85c9ffd4e2d10a6f (diff)
downloadlinux-5c02a4206538da12c040b51778d310df84c6bf6c.tar.gz
avr32: handle NULL as a valid clock object
Since NULL is used as valid clock object on optional clocks we have to handle this case in avr32 implementation as well. Fixes: e1824dfe0d8e (net: macb: Adjust tx_clk when link speed changes) Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Diffstat (limited to 'arch/avr32')
-rw-r--r--arch/avr32/mach-at32ap/clock.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/avr32/mach-at32ap/clock.c b/arch/avr32/mach-at32ap/clock.c
index 23b1a97fae7a..52c179bec0cc 100644
--- a/arch/avr32/mach-at32ap/clock.c
+++ b/arch/avr32/mach-at32ap/clock.c
@@ -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);