diff options
| -rw-r--r-- | arch/ia64/kernel/irq.c | 11 | ||||
| -rw-r--r-- | include/asm-ia64/irq.h | 6 | ||||
| -rw-r--r-- | kernel/irq/proc.c | 7 |
3 files changed, 24 insertions, 0 deletions
diff --git a/arch/ia64/kernel/irq.c b/arch/ia64/kernel/irq.c index ce49c85c928..b4c239685d2 100644 --- a/arch/ia64/kernel/irq.c +++ b/arch/ia64/kernel/irq.c @@ -104,6 +104,17 @@ void set_irq_affinity_info (unsigned int irq, int hwid, int redir) irq_redir[irq] = (char) (redir & 0xff); } } + +bool is_affinity_mask_valid(cpumask_t cpumask) +{ + if (ia64_platform_is("sn2")) { + /* Only allow one CPU to be specified in the smp_affinity mask */ + if (cpus_weight(cpumask) != 1) + return false; + } + return true; +} + #endif /* CONFIG_SMP */ #ifdef CONFIG_HOTPLUG_CPU diff --git a/include/asm-ia64/irq.h b/include/asm-ia64/irq.h index 79479e2c696..67221615e31 100644 --- a/include/asm-ia64/irq.h +++ b/include/asm-ia64/irq.h @@ -11,6 +11,9 @@ * 02/29/00 D.Mosberger moved most things into hw_irq.h */ +#include <linux/types.h> +#include <linux/cpumask.h> + #define NR_IRQS 256 #define NR_IRQ_VECTORS NR_IRQS @@ -29,5 +32,8 @@ extern void disable_irq (unsigned int); extern void disable_irq_nosync (unsigned int); extern void enable_irq (unsigned int); extern void set_irq_affinity_info (unsigned int irq, int dest, int redir); +bool is_affinity_mask_valid(cpumask_t cpumask); + +#define is_affinity_mask_valid is_affinity_mask_valid #endif /* _ASM_IA64_IRQ_H */ diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index ddde0ef9ccd..b4f1674fca7 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -27,6 +27,10 @@ static int irq_affinity_read_proc(char *page, char **start, off_t off, return len; } +#ifndef is_affinity_mask_valid +#define is_affinity_mask_valid(val) 1 +#endif + int no_irq_affinity; static int irq_affinity_write_proc(struct file *file, const char __user *buffer, unsigned long count, void *data) @@ -42,6 +46,9 @@ static int irq_affinity_write_proc(struct file *file, const char __user *buffer, if (err) return err; + if (!is_affinity_mask_valid(new_value)) + return -EINVAL; + /* * Do not allow disabling IRQs completely - it's a too easy * way to make the system unusable accidentally :-) At least |