From: Jens Taprogge Date: Wed, 12 Sep 2012 12:55:34 +0000 (+0200) Subject: Staging: ipack/bridges/tpci200: Clean up interrupt handling. X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=88ff8480d39da6b2961444f0c28b5b0d194d2de6;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git Staging: ipack/bridges/tpci200: Clean up interrupt handling. Previously the return value from tpci200_interrupt was not quite correct if a slot had caused an interrupt but no handler was instellalled: IRQ_NONE was returned. However in this case we react to the interrupt by disabling the IPack device interrupt. Basically there are two cases the code now distinguishes: - The tpci200 has raised an interrupt. We handle it and return IRQ_HANDLED. - Our device did not raise an interrupt. We return IRQ_NONE. Signed-off-by: Jens Taprogge Signed-off-by: Samuel Iglesias Gonsalvez Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/ipack/bridges/tpci200.c b/drivers/staging/ipack/bridges/tpci200.c index b1ddbe3ec33..0cbaf3ab53c 100644 --- a/drivers/staging/ipack/bridges/tpci200.c +++ b/drivers/staging/ipack/bridges/tpci200.c @@ -116,7 +116,6 @@ 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; - irqreturn_t ret = IRQ_NONE; struct slot_irq *slot_irq; /* Read status register */ @@ -130,7 +129,7 @@ static irqreturn_t tpci200_interrupt(int irq, void *dev_id) continue; slot_irq = rcu_dereference(tpci200->slots[i].irq); if (slot_irq) { - ret = tpci200_slot_irq(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", @@ -141,9 +140,11 @@ static irqreturn_t tpci200_interrupt(int irq, void *dev_id) } } rcu_read_unlock(); - } - return ret; + return IRQ_HANDLED; + } else { + return IRQ_NONE; + } } static int tpci200_register(struct tpci200_board *tpci200)