irq: remove >= nr_irqs checking with config_have_sparse_irq

remove irq limit checks - nr_irqs is dynamic and we expand anytime.

v2: fix checking about result irq_cfg_without_new, so could use msi again
v3: use irq_desc_without_new to check irq is valid

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 9 deletions

diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c
index 60d60061659c..1b8cccb5ba25 100644
--- a/arch/x86/kernel/io_apic_64.c
+++ b/arch/x86/kernel/io_apic_64.c
@@ -400,7 +400,6 @@ static inline void io_apic_sync(unsigned int apic)
         struct irq_cfg *cfg;                                            \
         struct irq_pin_list *entry;                                     \
                                                                         \
-        BUG_ON(irq >= nr_irqs);                                         \
         cfg = irq_cfg(irq);                                             \
         entry = cfg->irq_2_pin;                                         \
         for (;;) {                                                      \
@@ -480,7 +479,6 @@ static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, u8 vector)
         struct irq_cfg *cfg;
         struct irq_pin_list *entry;
 
-        BUG_ON(irq >= nr_irqs);
         cfg = irq_cfg(irq);
         entry = cfg->irq_2_pin;
         for (;;) {
@@ -549,7 +547,6 @@ static void add_pin_to_irq(unsigned int irq, int apic, int pin)
         struct irq_cfg *cfg;
         struct irq_pin_list *entry;
 
-        BUG_ON(irq >= nr_irqs);
         /* first time to refer irq_cfg, so with new */
         cfg = irq_cfg_alloc(irq);
         entry = cfg->irq_2_pin;
@@ -841,7 +838,6 @@ int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin)
                                 best_guess = irq;
                 }
         }
-        BUG_ON(best_guess >= nr_irqs);
         return best_guess;
 }
 
@@ -973,7 +969,6 @@ static int pin_2_irq(int idx, int apic, int pin)
                         irq += nr_ioapic_registers[i++];
                 irq += pin;
         }
-        BUG_ON(irq >= nr_irqs);
         return irq;
 }
 
@@ -1008,7 +1003,6 @@ static int __assign_irq_vector(int irq, cpumask_t mask)
         int cpu;
         struct irq_cfg *cfg;
 
-        BUG_ON((unsigned)irq >= nr_irqs);
         cfg = irq_cfg(irq);
 
         /* Only try and allocate irqs on cpus that are present */
@@ -1082,7 +1076,6 @@ static void __clear_irq_vector(int irq)
         cpumask_t mask;
         int cpu, vector;
 
-        BUG_ON((unsigned)irq >= nr_irqs);
         cfg = irq_cfg(irq);
         BUG_ON(!cfg->vector);
 
@@ -1924,8 +1917,6 @@ asmlinkage void smp_irq_move_cleanup_interrupt(void)
                 struct irq_desc *desc;
                 struct irq_cfg *cfg;
                 irq = __get_cpu_var(vector_irq)[vector];
-                if (irq >= nr_irqs)
-                        continue;
 
                 desc = irq_to_desc(irq);
                 cfg = irq_cfg(irq);