diff options
Diffstat (limited to 'drivers/net/can/kvaser_pciefd.c')
| -rw-r--r-- | drivers/net/can/kvaser_pciefd.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c index a60d9efd5f8d..9ffc3ffb4e8f 100644 --- a/drivers/net/can/kvaser_pciefd.c +++ b/drivers/net/can/kvaser_pciefd.c @@ -1686,6 +1686,7 @@ static irqreturn_t kvaser_pciefd_irq_handler(int irq, void *dev) const struct kvaser_pciefd_irq_mask *irq_mask = pcie->driver_data->irq_mask; u32 pci_irq = ioread32(KVASER_PCIEFD_PCI_IRQ_ADDR(pcie)); u32 srb_irq = 0; + u32 srb_release = 0; int i; if (!(pci_irq & irq_mask->all)) @@ -1699,17 +1700,14 @@ static irqreturn_t kvaser_pciefd_irq_handler(int irq, void *dev) kvaser_pciefd_transmit_irq(pcie->can[i]); } - if (srb_irq & KVASER_PCIEFD_SRB_IRQ_DPD0) { - /* Reset DMA buffer 0, may trigger new interrupt */ - iowrite32(KVASER_PCIEFD_SRB_CMD_RDB0, - KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_CMD_REG); - } + if (srb_irq & KVASER_PCIEFD_SRB_IRQ_DPD0) + srb_release |= KVASER_PCIEFD_SRB_CMD_RDB0; - if (srb_irq & KVASER_PCIEFD_SRB_IRQ_DPD1) { - /* Reset DMA buffer 1, may trigger new interrupt */ - iowrite32(KVASER_PCIEFD_SRB_CMD_RDB1, - KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_CMD_REG); - } + if (srb_irq & KVASER_PCIEFD_SRB_IRQ_DPD1) + srb_release |= KVASER_PCIEFD_SRB_CMD_RDB1; + + if (srb_release) + iowrite32(srb_release, KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_CMD_REG); return IRQ_HANDLED; } |