UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

mfd: htc-i2cpld: Cleanup interrupt handling 

Remove the pointless irq_desc check in set_type. This function is
called with that irq descriptor locked. Also remove the write back of
the flow type as the core code does this already when the return value
is 0.

Also store the flow type in the chip data structure, so there is no
need to fiddle in the irq descriptor.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Thomas Gleixner 2011-03-25 11:12:29 +00:00 committed by Samuel Ortiz
parent 77eda96691
commit 9eaee99e5a
1 changed files with 7 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/mfd/htc-i2cpld.c
View File

@ -58,6 +58,7 @@ struct htcpld_chip {
uint irq_start;
int nirqs;
unsigned int flow_type;
/*
* Work structure to allow for setting values outside of any
* possible interrupt context
@ -97,12 +98,7 @@ static void htcpld_unmask(struct irq_data *data)
static int htcpld_set_type(struct irq_data *data, unsigned int flags)
{
struct irq_desc *d = irq_to_desc(data->irq);
if (!d) {
pr_err("HTCPLD invalid IRQ: %d\n", data->irq);
return -EINVAL;
}
struct htcpld_chip *chip = irq_data_get_irq_chip_data(data);
if (flags & ~IRQ_TYPE_SENSE_MASK)
return -EINVAL;
@ -111,9 +107,7 @@ static int htcpld_set_type(struct irq_data *data, unsigned int flags)
if (flags & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH))
return -EINVAL;
d->status &= ~IRQ_TYPE_SENSE_MASK;
d->status |= flags;
chip->flow_type = flags;
return 0;
}
@ -135,7 +129,6 @@ static irqreturn_t htcpld_handler(int irq, void *dev)
unsigned int i;
unsigned long flags;
int irqpin;
struct irq_desc *desc;
if (!htcpld) {
pr_debug("htcpld is null in ISR\n");
@ -195,23 +188,19 @@ static irqreturn_t htcpld_handler(int irq, void *dev)
* associated interrupts.
*/
for (irqpin = 0; irqpin < chip->nirqs; irqpin++) {
unsigned oldb, newb;
int flags;
unsigned oldb, newb, type = chip->flow_type;
irq = chip->irq_start + irqpin;
desc = irq_to_desc(irq);
flags = desc->status;
/* Run the IRQ handler, but only if the bit value
* changed, and the proper flags are set */
oldb = (old_val >> irqpin) & 1;
newb = (uval >> irqpin) & 1;
if ((!oldb && newb && (flags & IRQ_TYPE_EDGE_RISING)) ||
(oldb && !newb &&
(flags & IRQ_TYPE_EDGE_FALLING))) {
if ((!oldb && newb && (type & IRQ_TYPE_EDGE_RISING)) ||
(oldb && !newb && (type & IRQ_TYPE_EDGE_FALLING))) {
pr_debug("fire IRQ %d\n", irqpin);
desc->handle_irq(irq, desc);
generic_handle_irq(irq);
}
}
}