Commit 4eb4e05f authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Kamal Mostafa

avr32: handle NULL as a valid clock object

commit 5c02a420 upstream.

Since NULL is used as valid clock object on optional clocks we have to handle
this case in avr32 implementation as well.

Fixes: e1824dfe (net: macb: Adjust tx_clk when link speed changes)
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: default avatarHans-Christian Egtvedt <egtvedt@samfundet.no>
Signed-off-by: default avatarKamal Mostafa <kamal@canonical.com>
parent 5f251f77
......@@ -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);
......
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