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MFD: mcp-core: fix complaints from the genirq layer

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The genirq layer complains if an interrupt handler returns with
interrupts enabled.  The UCB1x00 handler does just this, because
ucb1x00_enable() calls mcp_enable(), which uses spin_lock_irq()
rather than spin_lock_irqsave().  Convert this, and the divisor
setting functions to use spin_lock_irqsave().

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2012-01-14 08:49:46 +00:00
parent 65f2e753f1
commit 9825022169
1 changed files with 11 additions and 6 deletions
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17
drivers/mfd/mcp-core.c
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@ -93,9 +93,11 @@ static struct bus_type mcp_bus_type = {
*/
void mcp_set_telecom_divisor(struct mcp *mcp, unsigned int div)
{
spin_lock_irq(&mcp->lock);
unsigned long flags;
spin_lock_irqsave(&mcp->lock, flags);
mcp->ops->set_telecom_divisor(mcp, div);
spin_unlock_irq(&mcp->lock);
spin_unlock_irqrestore(&mcp->lock, flags);
}
EXPORT_SYMBOL(mcp_set_telecom_divisor);
@ -108,9 +110,11 @@ EXPORT_SYMBOL(mcp_set_telecom_divisor);
*/
void mcp_set_audio_divisor(struct mcp *mcp, unsigned int div)
{
spin_lock_irq(&mcp->lock);
unsigned long flags;
spin_lock_irqsave(&mcp->lock, flags);
mcp->ops->set_audio_divisor(mcp, div);
spin_unlock_irq(&mcp->lock);
spin_unlock_irqrestore(&mcp->lock, flags);
}
EXPORT_SYMBOL(mcp_set_audio_divisor);
@ -163,10 +167,11 @@ EXPORT_SYMBOL(mcp_reg_read);
*/
void mcp_enable(struct mcp *mcp)
{
spin_lock_irq(&mcp->lock);
unsigned long flags;
spin_lock_irqsave(&mcp->lock, flags);
if (mcp->use_count++ == 0)
mcp->ops->enable(mcp);
spin_unlock_irq(&mcp->lock);
spin_unlock_irqrestore(&mcp->lock, flags);
}
EXPORT_SYMBOL(mcp_enable);