diff options
| author | Jens Taprogge <jens.taprogge@taprogge.org> | 2012-09-12 14:55:25 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-09-12 09:54:15 -0700 |
| commit | af2140ce288fcb12a3c30a69b6ba93fd64d0a861 (patch) | |
| tree | 1aca7bb8c6a35f583068ee4db097dd81aebe8a87 /drivers | |
| parent | 9b27adbced2455bfd7e5d1b76a7f151de3d25dec (diff) | |
Staging: ipack/bridges/tpci200: Clean up interrupt handler.
This also removes a possible bug in the unhandles_ints part when
slots[i] is not set.
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/ipack/bridges/tpci200.c | 42 |
1 files changed, 17 insertions, 25 deletions
diff --git a/drivers/staging/ipack/bridges/tpci200.c b/drivers/staging/ipack/bridges/tpci200.c index 3285dade2dd8..24e2a119dd16 100644 --- a/drivers/staging/ipack/bridges/tpci200.c +++ b/drivers/staging/ipack/bridges/tpci200.c @@ -108,12 +108,22 @@ 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); + + /* Dummy reads */ + readw(slot_irq->holder->io_space.address + 0xC0); + readw(slot_irq->holder->io_space.address + 0xC2); + + return ret; +} + 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; - unsigned short unhandled_ints = 0; irqreturn_t ret = IRQ_NONE; struct slot_irq *slot_irq; @@ -121,33 +131,15 @@ static irqreturn_t tpci200_interrupt(int irq, void *dev_id) status_reg = readw(&tpci200->info->interface_regs->status); if (status_reg & TPCI200_SLOT_INT_MASK) { - unhandled_ints = status_reg & TPCI200_SLOT_INT_MASK; /* callback to the IRQ handler for the corresponding slot */ for (i = 0; i < TPCI200_NB_SLOT; i++) { + if (!(status_reg & ((TPCI200_A_INT0 | TPCI200_A_INT1) << (2*i)))) + continue; slot_irq = tpci200->slots[i].irq; - - if ((slot_irq != NULL) && - (status_reg & ((TPCI200_A_INT0 | TPCI200_A_INT1) << (2*i)))) { - - ret = slot_irq->handler(slot_irq->arg); - - /* Dummy reads */ - readw(slot_irq->holder->io_space.address + - 0xC0); - readw(slot_irq->holder->io_space.address + - 0xC2); - - unhandled_ints &= ~(((TPCI200_A_INT0 | TPCI200_A_INT1) << (2*i))); - } - } - } - /* Interrupts not handled are disabled */ - if (unhandled_ints) { - for (i = 0; i < TPCI200_NB_SLOT; i++) { - slot_irq = tpci200->slots[i].irq; - - if (unhandled_ints & ((TPCI200_INT0_EN | TPCI200_INT1_EN) << (2*i))) { - dev_info(&slot_irq->holder->dev, + if (slot_irq) { + ret = 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( |