diff options
| -rw-r--r-- | bsps/arm/lpc32xx/irq/irq.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/bsps/arm/lpc32xx/irq/irq.c b/bsps/arm/lpc32xx/irq/irq.c index a62eee6dd5..2b047be559 100644 --- a/bsps/arm/lpc32xx/irq/irq.c +++ b/bsps/arm/lpc32xx/irq/irq.c @@ -334,8 +334,12 @@ rtems_status_code bsp_interrupt_vector_enable(rtems_vector_number vector) bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector)); rtems_interrupt_disable(level); - lpc32xx_irq_set_bit_in_register(vector, LPC32XX_IRQ_OFFSET_ER); - lpc32xx_irq_set_bit_in_field(vector, &lpc32xx_irq_enable); + + if (!lpc32xx_irq_is_bit_set_in_field(vector, &lpc32xx_irq_enable)) { + lpc32xx_irq_set_bit_in_field(vector, &lpc32xx_irq_enable); + lpc32xx_irq_set_bit_in_register(vector, LPC32XX_IRQ_OFFSET_ER); + } + rtems_interrupt_enable(level); return RTEMS_SUCCESSFUL; |