diff options
Diffstat (limited to 'arch/arc/plat-arcfpga/irq.c')
| -rw-r--r-- | arch/arc/plat-arcfpga/irq.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arc/plat-arcfpga/irq.c b/arch/arc/plat-arcfpga/irq.c index ed726360b9f6..590edd174c47 100644 --- a/arch/arc/plat-arcfpga/irq.c +++ b/arch/arc/plat-arcfpga/irq.c @@ -9,7 +9,17 @@ */ #include <linux/interrupt.h> +#include <asm/irq.h> void __init plat_init_IRQ(void) { + /* + * SMP Hack because UART IRQ hardwired to cpu0 (boot-cpu) but if the + * request_irq() comes from any other CPU, the low level IRQ unamsking + * essential for getting Interrupts won't be enabled on cpu0, locking + * up the UART state machine. + */ +#ifdef CONFIG_SMP + arch_unmask_irq(UART0_IRQ); +#endif } |