diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index be31d85a50e..4604153b795 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1052,9 +1052,17 @@ static int sci_request_irq(struct sci_port *port) if (SCIx_IRQ_IS_MUXED(port)) { i = SCIx_MUX_IRQ; irq = up->irq; - } else + } else { irq = port->cfg->irqs[i]; + /* + * Certain port types won't support all of the + * available interrupt sources. + */ + if (unlikely(!irq)) + continue; + } + desc = sci_irq_desc + i; port->irqstr[j] = kasprintf(GFP_KERNEL, "%s:%s", dev_name(up->dev), desc->desc); @@ -1094,6 +1102,15 @@ static void sci_free_irq(struct sci_port *port) * IRQ first. */ for (i = 0; i < SCIx_NR_IRQS; i++) { + unsigned int irq = port->cfg->irqs[i]; + + /* + * Certain port types won't support all of the available + * interrupt sources. + */ + if (unlikely(!irq)) + continue; + free_irq(port->cfg->irqs[i], port); kfree(port->irqstr[i]); |