The request for an IRQ handler must be done after whole configuration. This was not the case for this driver which request the IRQ in the middle of the configuration. Sometimes, it happens that something is not completely configured, we recieve an interrupt thus we stumble into troubles in the IRQ handler.
Signed-off-by: Federico Vaga <federico.v...@cern.ch> --- drivers/ipack/devices/ipoctal.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c index a7ec6f9..72fd761 100644 --- a/drivers/ipack/devices/ipoctal.c +++ b/drivers/ipack/devices/ipoctal.c @@ -344,13 +344,6 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr, &block_regs[i].w.imr); } - /* - * IP-OCTAL has different addresses to copy its IRQ vector. - * Depending of the carrier these addresses are accesible or not. - * More info in the datasheet. - */ - ipoctal->dev->bus->ops->request_irq(ipoctal->dev, - ipoctal_irq_handler, ipoctal); /* Dummy write */ iowrite8(1, ipoctal->mem8_space + 1); @@ -411,6 +404,14 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr, dev_set_drvdata(tty_dev, channel); } + /* + * IP-OCTAL has different addresses to copy its IRQ vector. + * Depending of the carrier these addresses are accesible or not. + * More info in the datasheet. + */ + ipoctal->dev->bus->ops->request_irq(ipoctal->dev, + ipoctal_irq_handler, ipoctal); + return 0; } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/