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Staging: ipack/bridges/tpci200: Cleanup in tpci200_slot_irq() and tpci200_interrupt()

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Minor cleanup.  No functional changes.

Signed-off-by: Jens Taprogge <jens.taprogge@taprogge.org>
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jens Taprogge 2012-09-12 14:55:35 +02:00 committed by Greg Kroah-Hartman
parent 88ff8480d3
commit ab0deffcb9
1 changed files with 31 additions and 27 deletions
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58
drivers/staging/ipack/bridges/tpci200.c
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@ -102,9 +102,13 @@ static void tpci200_unregister(struct tpci200_board *tpci200)
static irqreturn_t tpci200_slot_irq(struct slot_irq *slot_irq)
{
irqreturn_t ret = slot_irq->handler(slot_irq->arg);
irqreturn_t ret;
/* Dummy reads */
if (!slot_irq)
return -ENODEV;
ret = slot_irq->handler(slot_irq->arg);
/* Clear the IPack device interrupt */
readw(slot_irq->holder->io_space.address + 0xC0);
readw(slot_irq->holder->io_space.address + 0xC2);
@ -114,37 +118,37 @@ static irqreturn_t tpci200_slot_irq(struct slot_irq *slot_irq)
static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
{
struct tpci200_board *tpci200 = (struct tpci200_board *) dev_id;
int i;
unsigned short status_reg;
struct slot_irq *slot_irq;
irqreturn_t ret;
u16 status_reg;
int i;
/* Read status register */
status_reg = readw(&tpci200->info->interface_regs->status);
status_reg = ioread16(&tpci200->info->interface_regs->status);
if (status_reg & TPCI200_SLOT_INT_MASK) {
/* callback to the IRQ handler for the corresponding slot */
rcu_read_lock();
for (i = 0; i < TPCI200_NB_SLOT; i++) {
if (!(status_reg & ((TPCI200_A_INT0 | TPCI200_A_INT1) << (2*i))))
continue;
slot_irq = rcu_dereference(tpci200->slots[i].irq);
if (slot_irq) {
tpci200_slot_irq(slot_irq);
} else {
dev_info(&tpci200->info->pdev->dev,
"No registered ISR for slot [%d:%d]!. IRQ will be disabled.\n",
tpci200->number, i);
tpci200_clear_mask(tpci200,
&tpci200->info->interface_regs->control[i],
TPCI200_INT0_EN | TPCI200_INT1_EN);
}
}
rcu_read_unlock();
return IRQ_HANDLED;
} else {
/* Did we cause the interrupt? */
if (!(status_reg & TPCI200_SLOT_INT_MASK))
return IRQ_NONE;
/* callback to the IRQ handler for the corresponding slot */
rcu_read_lock();
for (i = 0; i < TPCI200_NB_SLOT; i++) {
if (!(status_reg & ((TPCI200_A_INT0 | TPCI200_A_INT1) << (2 * i))))
continue;
slot_irq = rcu_dereference(tpci200->slots[i].irq);
ret = tpci200_slot_irq(slot_irq);
if (ret == -ENODEV) {
dev_info(&tpci200->info->pdev->dev,
"No registered ISR for slot [%d:%d]!. IRQ will be disabled.\n",
tpci200->number, i);
tpci200_clear_mask(tpci200,
&tpci200->info->interface_regs->control[i],
TPCI200_INT0_EN | TPCI200_INT1_EN);
}
}
rcu_read_unlock();
return IRQ_HANDLED;
}
static int tpci200_register(struct tpci200_board *tpci200)