From: Jimmy Assarsson <extja@xxxxxxxxxx>
The PCI interrupt register, KVASER_PCIEFD_IRQ_REG, is level triggered.
Writing to the register doesn't affect it.
Fixes: 26ad340e582d ("can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices")
Signed-off-by: Jimmy Assarsson <extja@xxxxxxxxxx>
Reviewed-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx>
Link: https://lore.kernel.org/all/20230529134248.752036-2-extja@xxxxxxxxxx
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
drivers/net/can/kvaser_pciefd.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c
index be189edb256c..d60d17199a1b 100644
--- a/drivers/net/can/kvaser_pciefd.c
+++ b/drivers/net/can/kvaser_pciefd.c
@@ -1768,7 +1768,6 @@ static irqreturn_t kvaser_pciefd_irq_handler(int irq, void *dev)
kvaser_pciefd_transmit_irq(pcie->can[i]);
}
- iowrite32(board_irq, pcie->reg_base + KVASER_PCIEFD_IRQ_REG);
return IRQ_HANDLED;
}
@@ -1842,9 +1841,7 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
KVASER_PCIEFD_SRB_IRQ_DUF0 | KVASER_PCIEFD_SRB_IRQ_DUF1,
pcie->reg_base + KVASER_PCIEFD_SRB_IEN_REG);
- /* Reset IRQ handling, expected to be off before */
- iowrite32(KVASER_PCIEFD_IRQ_ALL_MSK,
- pcie->reg_base + KVASER_PCIEFD_IRQ_REG);
+ /* Enable PCI interrupts */
iowrite32(KVASER_PCIEFD_IRQ_ALL_MSK,
pcie->reg_base + KVASER_PCIEFD_IEN_REG);
@@ -1906,10 +1903,8 @@ static void kvaser_pciefd_remove(struct pci_dev *pdev)
kvaser_pciefd_remove_all_ctrls(pcie);
- /* Turn off IRQ generation */
+ /* Disable interrupts */
iowrite32(0, pcie->reg_base + KVASER_PCIEFD_SRB_CTRL_REG);
- iowrite32(KVASER_PCIEFD_IRQ_ALL_MSK,
- pcie->reg_base + KVASER_PCIEFD_IRQ_REG);
iowrite32(0, pcie->reg_base + KVASER_PCIEFD_IEN_REG);
free_irq(pcie->pci->irq, pcie);
--
2.40.1
