irq: change ->set_affinity() to return status

according to Ingo, change set_affinity() in irq_chip should return int,
because that way we can handle failure cases in a much cleaner way, in
the genirq layer.

v2: fix two typos

[ Impact: extend API ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: linux-arch@vger.kernel.org
LKML-Reference: <49F654E9.4070809@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/alpha/kernel/sys_dp264.c b/arch/alpha/kernel/sys_dp264.c
index 9c9d1fd..5bd5259 100644 (file)
--- a/arch/alpha/kernel/sys_dp264.c
+++ b/arch/alpha/kernel/sys_dp264.c
@@ -176,22 +176,26 @@ cpu_set_irq_affinity(unsigned int irq, cpumask_t affinity)
        }
 }
 
-static void
+static int
 dp264_set_affinity(unsigned int irq, const struct cpumask *affinity)
 { 
        spin_lock(&dp264_irq_lock);
        cpu_set_irq_affinity(irq, *affinity);
        tsunami_update_irq_hw(cached_irq_mask);
        spin_unlock(&dp264_irq_lock);
+
+       return 0;
 }
 
-static void
+static int
 clipper_set_affinity(unsigned int irq, const struct cpumask *affinity)
 { 
        spin_lock(&dp264_irq_lock);
        cpu_set_irq_affinity(irq - 16, *affinity);
        tsunami_update_irq_hw(cached_irq_mask);
        spin_unlock(&dp264_irq_lock);
+
+       return 0;
 }
 
 static struct hw_interrupt_type dp264_irq_type = {

diff --git a/arch/alpha/kernel/sys_titan.c b/arch/alpha/kernel/sys_titan.c
index 27f840a..8dd239e 100644 (file)
--- a/arch/alpha/kernel/sys_titan.c
+++ b/arch/alpha/kernel/sys_titan.c
@@ -157,13 +157,15 @@ titan_cpu_set_irq_affinity(unsigned int irq, cpumask_t affinity)
 
 }
 
-static void
+static int
 titan_set_irq_affinity(unsigned int irq, const struct cpumask *affinity)
 { 
        spin_lock(&titan_irq_lock);
        titan_cpu_set_irq_affinity(irq - 16, *affinity);
        titan_update_irq_hw(titan_cached_irq_mask);
        spin_unlock(&titan_irq_lock);
+
+       return 0;
 }
 
 static void

diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index c6884ba..90f6b7f 100644 (file)
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -109,7 +109,7 @@ static void gic_unmask_irq(unsigned int irq)
 }
 
 #ifdef CONFIG_SMP
-static void gic_set_cpu(unsigned int irq, const struct cpumask *mask_val)
+static int gic_set_cpu(unsigned int irq, const struct cpumask *mask_val)
 {
        void __iomem *reg = gic_dist_base(irq) + GIC_DIST_TARGET + (gic_irq(irq) & ~3);
        unsigned int shift = (irq % 4) * 8;
@@ -122,6 +122,8 @@ static void gic_set_cpu(unsigned int irq, const struct cpumask *mask_val)
        val |= 1 << (cpu + shift);
        writel(val, reg);
        spin_unlock(&irq_controller_lock);
+
+       return 0;
 }
 #endif
 

diff --git a/arch/cris/arch-v32/kernel/irq.c b/arch/cris/arch-v32/kernel/irq.c
index df3925c..d70b445 100644 (file)
--- a/arch/cris/arch-v32/kernel/irq.c
+++ b/arch/cris/arch-v32/kernel/irq.c
@@ -325,12 +325,14 @@ static void end_crisv32_irq(unsigned int irq)
 {
 }
 
-void set_affinity_crisv32_irq(unsigned int irq, const struct cpumask *dest)
+int set_affinity_crisv32_irq(unsigned int irq, const struct cpumask *dest)
 {
        unsigned long flags;
        spin_lock_irqsave(&irq_lock, flags);
        irq_allocations[irq - FIRST_IRQ].mask = *dest;
        spin_unlock_irqrestore(&irq_lock, flags);
+
+       return 0;
 }
 
 static struct irq_chip crisv32_irq_type = {

diff --git a/arch/ia64/hp/sim/hpsim_irq.c b/arch/ia64/hp/sim/hpsim_irq.c
index cc0a318..acb5047 100644 (file)
--- a/arch/ia64/hp/sim/hpsim_irq.c
+++ b/arch/ia64/hp/sim/hpsim_irq.c
@@ -21,9 +21,10 @@ hpsim_irq_noop (unsigned int irq)
 {
 }
 
-static void
+static int
 hpsim_set_affinity_noop(unsigned int a, const struct cpumask *b)
 {
+       return 0;
 }
 
 static struct hw_interrupt_type irq_type_hp_sim = {

diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c
index 166e0d8..f92cef4 100644 (file)
--- a/arch/ia64/kernel/iosapic.c
+++ b/arch/ia64/kernel/iosapic.c
@@ -329,7 +329,7 @@ unmask_irq (unsigned int irq)
 }
 
 
-static void
+static int
 iosapic_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
 #ifdef CONFIG_SMP
@@ -343,15 +343,15 @@ iosapic_set_affinity(unsigned int irq, const struct cpumask *mask)
 
        cpu = cpumask_first_and(cpu_online_mask, mask);
        if (cpu >= nr_cpu_ids)
-               return;
+               return -1;
 
        if (irq_prepare_move(irq, cpu))
-               return;
+               return -1;
 
        dest = cpu_physical_id(cpu);
 
        if (!iosapic_intr_info[irq].count)
-               return;                 /* not an IOSAPIC interrupt */
+               return -1;                      /* not an IOSAPIC interrupt */
 
        set_irq_affinity_info(irq, dest, redir);
 
@@ -376,7 +376,9 @@ iosapic_set_affinity(unsigned int irq, const struct cpumask *mask)
                iosapic_write(iosapic, IOSAPIC_RTE_HIGH(rte_index), high32);
                iosapic_write(iosapic, IOSAPIC_RTE_LOW(rte_index), low32);
        }
+
 #endif
+       return 0;
 }
 
 /*

diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c
index 2b15e23..0f8ade9 100644 (file)
--- a/arch/ia64/kernel/msi_ia64.c
+++ b/arch/ia64/kernel/msi_ia64.c
@@ -12,7 +12,7 @@
 static struct irq_chip ia64_msi_chip;
 
 #ifdef CONFIG_SMP
-static void ia64_set_msi_irq_affinity(unsigned int irq,
+static int ia64_set_msi_irq_affinity(unsigned int irq,
                                      const cpumask_t *cpu_mask)
 {
        struct msi_msg msg;
@@ -20,10 +20,10 @@ static void ia64_set_msi_irq_affinity(unsigned int irq,
        int cpu = first_cpu(*cpu_mask);
 
        if (!cpu_online(cpu))
-               return;
+               return -1;
 
        if (irq_prepare_move(irq, cpu))
-               return;
+               return -1;
 
        read_msi_msg(irq, &msg);
 
@@ -39,6 +39,8 @@ static void ia64_set_msi_irq_affinity(unsigned int irq,
 
        write_msi_msg(irq, &msg);
        cpumask_copy(irq_desc[irq].affinity, cpumask_of(cpu));
+
+       return 0;
 }
 #endif /* CONFIG_SMP */
 
@@ -130,17 +132,17 @@ void arch_teardown_msi_irq(unsigned int irq)
 
 #ifdef CONFIG_DMAR
 #ifdef CONFIG_SMP
-static void dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
+static int dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
        struct irq_cfg *cfg = irq_cfg + irq;
        struct msi_msg msg;
        int cpu = cpumask_first(mask);
 
        if (!cpu_online(cpu))
-               return;
+               return -1;
 
        if (irq_prepare_move(irq, cpu))
-               return;
+               return -1;
 
        dmar_msi_read(irq, &msg);
 
@@ -151,6 +153,8 @@ static void dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
 
        dmar_msi_write(irq, &msg);
        cpumask_copy(irq_desc[irq].affinity, mask);
+
+       return 0;
 }
 #endif /* CONFIG_SMP */
 

diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c
index 66fd705..764f26a 100644 (file)
--- a/arch/ia64/sn/kernel/irq.c
+++ b/arch/ia64/sn/kernel/irq.c
@@ -227,7 +227,7 @@ finish_up:
        return new_irq_info;
 }
 
-static void sn_set_affinity_irq(unsigned int irq, const struct cpumask *mask)
+static int sn_set_affinity_irq(unsigned int irq, const struct cpumask *mask)
 {
        struct sn_irq_info *sn_irq_info, *sn_irq_info_safe;
        nasid_t nasid;
@@ -239,6 +239,8 @@ static void sn_set_affinity_irq(unsigned int irq, const struct cpumask *mask)
        list_for_each_entry_safe(sn_irq_info, sn_irq_info_safe,
                                 sn_irq_lh[irq], list)
                (void)sn_retarget_vector(sn_irq_info, nasid, slice);
+
+       return 0;
 }
 
 #ifdef CONFIG_SMP

diff --git a/arch/ia64/sn/kernel/msi_sn.c b/arch/ia64/sn/kernel/msi_sn.c
index 81e4289..fbbfb97 100644 (file)
--- a/arch/ia64/sn/kernel/msi_sn.c
+++ b/arch/ia64/sn/kernel/msi_sn.c
@@ -151,7 +151,7 @@ int sn_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *entry)
 }
 
 #ifdef CONFIG_SMP
-static void sn_set_msi_irq_affinity(unsigned int irq,
+static int sn_set_msi_irq_affinity(unsigned int irq,
                                    const struct cpumask *cpu_mask)
 {
        struct msi_msg msg;
@@ -168,7 +168,7 @@ static void sn_set_msi_irq_affinity(unsigned int irq,
        cpu = cpumask_first(cpu_mask);
        sn_irq_info = sn_msi_info[irq].sn_irq_info;
        if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0)
-               return;
+               return -1;
 
        /*
         * Release XIO resources for the old MSI PCI address
@@ -189,7 +189,7 @@ static void sn_set_msi_irq_affinity(unsigned int irq,
        new_irq_info = sn_retarget_vector(sn_irq_info, nasid, slice);
        sn_msi_info[irq].sn_irq_info = new_irq_info;
        if (new_irq_info == NULL)
-               return;
+               return -1;
 
        /*
         * Map the xio address into bus space
@@ -206,6 +206,8 @@ static void sn_set_msi_irq_affinity(unsigned int irq,
 
        write_msi_msg(irq, &msg);
        cpumask_copy(irq_desc[irq].affinity, cpu_mask);
+
+       return 0;
 }
 #endif /* CONFIG_SMP */
 

diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c
index 1c19af8..d3a0c81 100644 (file)
--- a/arch/mips/cavium-octeon/octeon-irq.c
+++ b/arch/mips/cavium-octeon/octeon-irq.c
@@ -177,7 +177,7 @@ static void octeon_irq_ciu0_disable(unsigned int irq)
 }
 
 #ifdef CONFIG_SMP
-static void octeon_irq_ciu0_set_affinity(unsigned int irq, const struct cpumask *dest)
+static int octeon_irq_ciu0_set_affinity(unsigned int irq, const struct cpumask *dest)
 {
        int cpu;
        int bit = irq - OCTEON_IRQ_WORKQ0;      /* Bit 0-63 of EN0 */
@@ -199,6 +199,8 @@ static void octeon_irq_ciu0_set_affinity(unsigned int irq, const struct cpumask
         */
        cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2));
        write_unlock(&octeon_irq_ciu0_rwlock);
+
+       return 0;
 }
 #endif
 
@@ -292,7 +294,7 @@ static void octeon_irq_ciu1_disable(unsigned int irq)
 }
 
 #ifdef CONFIG_SMP
-static void octeon_irq_ciu1_set_affinity(unsigned int irq, const struct cpumask *dest)
+static int octeon_irq_ciu1_set_affinity(unsigned int irq, const struct cpumask *dest)
 {
        int cpu;
        int bit = irq - OCTEON_IRQ_WDOG0;       /* Bit 0-63 of EN1 */
@@ -315,6 +317,8 @@ static void octeon_irq_ciu1_set_affinity(unsigned int irq, const struct cpumask
         */
        cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1));
        write_unlock(&octeon_irq_ciu1_rwlock);
+
+       return 0;
 }
 #endif
 

diff --git a/arch/mips/include/asm/irq.h b/arch/mips/include/asm/irq.h
index 3214ade..4f1eed1 100644 (file)
--- a/arch/mips/include/asm/irq.h
+++ b/arch/mips/include/asm/irq.h
@@ -49,7 +49,7 @@ static inline void smtc_im_ack_irq(unsigned int irq)
 #ifdef CONFIG_MIPS_MT_SMTC_IRQAFF
 #include <linux/cpumask.h>
 
-extern void plat_set_irq_affinity(unsigned int irq,
+extern int plat_set_irq_affinity(unsigned int irq,
                                  const struct cpumask *affinity);
 extern void smtc_forward_irq(unsigned int irq);
 

diff --git a/arch/mips/kernel/irq-gic.c b/arch/mips/kernel/irq-gic.c
index 87deb8f..3f43c2e 100644 (file)
--- a/arch/mips/kernel/irq-gic.c
+++ b/arch/mips/kernel/irq-gic.c
@@ -155,7 +155,7 @@ static void gic_unmask_irq(unsigned int irq)
 
 static DEFINE_SPINLOCK(gic_lock);
 
-static void gic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
+static int gic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
 {
        cpumask_t       tmp = CPU_MASK_NONE;
        unsigned long   flags;
@@ -166,7 +166,7 @@ static void gic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
 
        cpumask_and(&tmp, cpumask, cpu_online_mask);
        if (cpus_empty(tmp))
-               return;
+               return -1;
 
        /* Assumption : cpumask refers to a single CPU */
        spin_lock_irqsave(&gic_lock, flags);
@@ -190,6 +190,7 @@ static void gic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
        cpumask_copy(irq_desc[irq].affinity, cpumask);
        spin_unlock_irqrestore(&gic_lock, flags);
 
+       return 0;
 }
 #endif
 

diff --git a/arch/mips/mti-malta/malta-smtc.c b/arch/mips/mti-malta/malta-smtc.c
index 5ba3188..499ffe5 100644 (file)
--- a/arch/mips/mti-malta/malta-smtc.c
+++ b/arch/mips/mti-malta/malta-smtc.c
@@ -114,7 +114,7 @@ struct plat_smp_ops msmtc_smp_ops = {
  */
 
 
-void plat_set_irq_affinity(unsigned int irq, const struct cpumask *affinity)
+int plat_set_irq_affinity(unsigned int irq, const struct cpumask *affinity)
 {
        cpumask_t tmask;
        int cpu = 0;
@@ -156,5 +156,7 @@ void plat_set_irq_affinity(unsigned int irq, const struct cpumask *affinity)
 
        /* Do any generic SMTC IRQ affinity setup */
        smtc_set_irq_affinity(irq, tmask);
+
+       return 0;
 }
 #endif /* CONFIG_MIPS_MT_SMTC_IRQAFF */

diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c
index 352352b..4f256a1 100644 (file)
--- a/arch/mips/sibyte/bcm1480/irq.c
+++ b/arch/mips/sibyte/bcm1480/irq.c
@@ -50,7 +50,7 @@ static void enable_bcm1480_irq(unsigned int irq);
 static void disable_bcm1480_irq(unsigned int irq);
 static void ack_bcm1480_irq(unsigned int irq);
 #ifdef CONFIG_SMP
-static void bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask);
+static int bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask);
 #endif
 
 #ifdef CONFIG_PCI
@@ -109,7 +109,7 @@ void bcm1480_unmask_irq(int cpu, int irq)
 }
 
 #ifdef CONFIG_SMP
-static void bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask)
+static int bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
        int i = 0, old_cpu, cpu, int_on, k;
        u64 cur_ints;
@@ -119,7 +119,7 @@ static void bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask)
 
        if (cpumask_weight(mask) != 1) {
                printk("attempted to set irq affinity for irq %d to multiple CPUs\n", irq);
-               return;
+               return -1;
        }
        i = cpumask_first(mask);
 
@@ -155,6 +155,8 @@ static void bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask)
        }
        spin_unlock(&bcm1480_imr_lock);
        spin_unlock_irqrestore(&desc->lock, flags);
+
+       return 0;
 }
 #endif
 

diff --git a/arch/mips/sibyte/sb1250/irq.c b/arch/mips/sibyte/sb1250/irq.c
index c08ff58..e389507 100644 (file)
--- a/arch/mips/sibyte/sb1250/irq.c
+++ b/arch/mips/sibyte/sb1250/irq.c
@@ -50,7 +50,7 @@ static void enable_sb1250_irq(unsigned int irq);
 static void disable_sb1250_irq(unsigned int irq);
 static void ack_sb1250_irq(unsigned int irq);
 #ifdef CONFIG_SMP
-static void sb1250_set_affinity(unsigned int irq, const struct cpumask *mask);
+static int sb1250_set_affinity(unsigned int irq, const struct cpumask *mask);
 #endif
 
 #ifdef CONFIG_SIBYTE_HAS_LDT
@@ -103,7 +103,7 @@ void sb1250_unmask_irq(int cpu, int irq)
 }
 
 #ifdef CONFIG_SMP
-static void sb1250_set_affinity(unsigned int irq, const struct cpumask *mask)
+static int sb1250_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
        int i = 0, old_cpu, cpu, int_on;
        u64 cur_ints;
@@ -114,7 +114,7 @@ static void sb1250_set_affinity(unsigned int irq, const struct cpumask *mask)
 
        if (cpumask_weight(mask) > 1) {
                printk("attempted to set irq affinity for irq %d to multiple CPUs\n", irq);
-               return;
+               return -1;
        }
 
        /* Convert logical CPU to physical CPU */
@@ -146,6 +146,8 @@ static void sb1250_set_affinity(unsigned int irq, const struct cpumask *mask)
        }
        spin_unlock(&sb1250_imr_lock);
        spin_unlock_irqrestore(&desc->lock, flags);
+
+       return 0;
 }
 #endif
 

diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 4ea4229..8007f1e 100644 (file)
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -130,15 +130,17 @@ int cpu_check_affinity(unsigned int irq, const struct cpumask *dest)
        return cpu_dest;
 }
 
-static void cpu_set_affinity_irq(unsigned int irq, const struct cpumask *dest)
+static int cpu_set_affinity_irq(unsigned int irq, const struct cpumask *dest)
 {
        int cpu_dest;
 
        cpu_dest = cpu_check_affinity(irq, dest);
        if (cpu_dest < 0)
-               return;
+               return -1;
 
        cpumask_copy(&irq_desc[irq].affinity, dest);
+
+       return 0;
 }
 #endif
 

diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index 80b5134..be3581a 100644 (file)
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -333,7 +333,7 @@ static void xics_eoi_lpar(unsigned int virq)
        lpar_xirr_info_set((0xff << 24) | irq);
 }
 
-static void xics_set_affinity(unsigned int virq, const struct cpumask *cpumask)
+static int xics_set_affinity(unsigned int virq, const struct cpumask *cpumask)
 {
        unsigned int irq;
        int status;
@@ -342,14 +342,14 @@ static void xics_set_affinity(unsigned int virq, const struct cpumask *cpumask)
 
        irq = (unsigned int)irq_map[virq].hwirq;
        if (irq == XICS_IPI || irq == XICS_IRQ_SPURIOUS)
-               return;
+               return -1;
 
        status = rtas_call(ibm_get_xive, 1, 3, xics_status, irq);
 
        if (status) {
                printk(KERN_ERR "%s: ibm,get-xive irq=%u returns %d\n",
                        __func__, irq, status);
-               return;
+               return -1;
        }
 
        /*
@@ -363,7 +363,7 @@ static void xics_set_affinity(unsigned int virq, const struct cpumask *cpumask)
                printk(KERN_WARNING
                        "%s: No online cpus in the mask %s for irq %d\n",
                        __func__, cpulist, virq);
-               return;
+               return -1;
        }
 
        status = rtas_call(ibm_set_xive, 3, 1, NULL,
@@ -372,8 +372,10 @@ static void xics_set_affinity(unsigned int virq, const struct cpumask *cpumask)
        if (status) {
                printk(KERN_ERR "%s: ibm,set-xive irq=%u returns %d\n",
                        __func__, irq, status);
-               return;
+               return -1;
        }
+
+       return 0;
 }
 
 static struct irq_chip xics_pic_direct = {

diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 21b9567..f4cbd15 100644 (file)
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -807,7 +807,7 @@ static void mpic_end_ipi(unsigned int irq)
 
 #endif /* CONFIG_SMP */
 
-void mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
+int mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
 {
        struct mpic *mpic = mpic_from_irq(irq);
        unsigned int src = mpic_irq_to_hw(irq);
@@ -824,6 +824,8 @@ void mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
                mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION),
                               mpic_physmask(cpus_addr(tmp)[0]));
        }
+
+       return 0;
 }
 
 static unsigned int mpic_type_to_vecpri(struct mpic *mpic, unsigned int type)

diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c
index 5deabe9..e5e78f9 100644 (file)
--- a/arch/sparc/kernel/irq_64.c
+++ b/arch/sparc/kernel/irq_64.c
@@ -318,10 +318,12 @@ static void sun4u_irq_enable(unsigned int virt_irq)
        }
 }
 
-static void sun4u_set_affinity(unsigned int virt_irq,
+static int sun4u_set_affinity(unsigned int virt_irq,
                               const struct cpumask *mask)
 {
        sun4u_irq_enable(virt_irq);
+
+       return 0;
 }
 
 /* Don't do anything.  The desc->status check for IRQ_DISABLED in
@@ -377,7 +379,7 @@ static void sun4v_irq_enable(unsigned int virt_irq)
                       ino, err);
 }
 
-static void sun4v_set_affinity(unsigned int virt_irq,
+static int sun4v_set_affinity(unsigned int virt_irq,
                               const struct cpumask *mask)
 {
        unsigned int ino = virt_irq_table[virt_irq].dev_ino;
@@ -388,6 +390,8 @@ static void sun4v_set_affinity(unsigned int virt_irq,
        if (err != HV_EOK)
                printk(KERN_ERR "sun4v_intr_settarget(%x,%lu): "
                       "err(%d)\n", ino, cpuid, err);
+
+       return 0;
 }
 
 static void sun4v_irq_disable(unsigned int virt_irq)
@@ -445,7 +449,7 @@ static void sun4v_virq_enable(unsigned int virt_irq)
                       dev_handle, dev_ino, err);
 }
 
-static void sun4v_virt_set_affinity(unsigned int virt_irq,
+static int sun4v_virt_set_affinity(unsigned int virt_irq,
                                    const struct cpumask *mask)
 {
        unsigned long cpuid, dev_handle, dev_ino;
@@ -461,6 +465,8 @@ static void sun4v_virt_set_affinity(unsigned int virt_irq,
                printk(KERN_ERR "sun4v_vintr_set_target(%lx,%lx,%lu): "
                       "err(%d)\n",
                       dev_handle, dev_ino, cpuid, err);
+
+       return 0;
 }
 
 static void sun4v_virq_disable(unsigned int virt_irq)

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 9fbf0f7..5c7630b 100644 (file)
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -574,13 +574,14 @@ set_desc_affinity(struct irq_desc *desc, const struct cpumask *mask)
        return apic->cpu_mask_to_apicid_and(desc->affinity, cfg->domain);
 }
 
-static void
+static int
 set_ioapic_affinity_irq_desc(struct irq_desc *desc, const struct cpumask *mask)
 {
        struct irq_cfg *cfg;
        unsigned long flags;
        unsigned int dest;
        unsigned int irq;
+       int ret = -1;
 
        irq = desc->irq;
        cfg = desc->chip_data;
@@ -591,18 +592,21 @@ set_ioapic_affinity_irq_desc(struct irq_desc *desc, const struct cpumask *mask)
                /* Only the high 8 bits are valid. */
                dest = SET_APIC_LOGICAL_ID(dest);
                __target_IO_APIC_irq(irq, dest, cfg);
+               ret = 0;
        }
        spin_unlock_irqrestore(&ioapic_lock, flags);
+
+       return ret;
 }
 
-static void
+static int
 set_ioapic_affinity_irq(unsigned int irq, const struct cpumask *mask)
 {
        struct irq_desc *desc;
 
        desc = irq_to_desc(irq);
 
-       set_ioapic_affinity_irq_desc(desc, mask);
+       return set_ioapic_affinity_irq_desc(desc, mask);
 }
 #endif /* CONFIG_SMP */
 
@@ -2348,24 +2352,25 @@ static int ioapic_retrigger_irq(unsigned int irq)
  * Real vector that is used for interrupting cpu will be coming from
  * the interrupt-remapping table entry.
  */
-static void
+static int
 migrate_ioapic_irq_desc(struct irq_desc *desc, const struct cpumask *mask)
 {
        struct irq_cfg *cfg;
        struct irte irte;
        unsigned int dest;
        unsigned int irq;
+       int ret = -1;
 
        if (!cpumask_intersects(mask, cpu_online_mask))
-               return;
+               return ret;
 
        irq = desc->irq;
        if (get_irte(irq, &irte))
-               return;
+               return ret;
 
        cfg = desc->chip_data;
        if (assign_irq_vector(irq, cfg, mask))
-               return;
+               return ret;
 
        dest = apic->cpu_mask_to_apicid_and(cfg->domain, mask);
 
@@ -2381,27 +2386,30 @@ migrate_ioapic_irq_desc(struct irq_desc *desc, const struct cpumask *mask)
                send_cleanup_vector(cfg);
 
        cpumask_copy(desc->affinity, mask);
+
+       return 0;
 }
 
 /*
  * Migrates the IRQ destination in the process context.
  */
-static void set_ir_ioapic_affinity_irq_desc(struct irq_desc *desc,
+static int set_ir_ioapic_affinity_irq_desc(struct irq_desc *desc,
                                            const struct cpumask *mask)
 {
-       migrate_ioapic_irq_desc(desc, mask);
+       return migrate_ioapic_irq_desc(desc, mask);
 }
-static void set_ir_ioapic_affinity_irq(unsigned int irq,
+static int set_ir_ioapic_affinity_irq(unsigned int irq,
                                       const struct cpumask *mask)
 {
        struct irq_desc *desc = irq_to_desc(irq);
 
-       set_ir_ioapic_affinity_irq_desc(desc, mask);
+       return set_ir_ioapic_affinity_irq_desc(desc, mask);
 }
 #else
-static inline void set_ir_ioapic_affinity_irq_desc(struct irq_desc *desc,
+static inline int set_ir_ioapic_affinity_irq_desc(struct irq_desc *desc,
                                                   const struct cpumask *mask)
 {
+       return 0;
 }
 #endif
 
@@ -3318,7 +3326,7 @@ static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_ms
 }
 
 #ifdef CONFIG_SMP
-static void set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
+static int set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
 {
        struct irq_desc *desc = irq_to_desc(irq);
        struct irq_cfg *cfg;
@@ -3327,7 +3335,7 @@ static void set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
 
        dest = set_desc_affinity(desc, mask);
        if (dest == BAD_APICID)
-               return;
+               return -1;
 
        cfg = desc->chip_data;
 
@@ -3339,13 +3347,15 @@ static void set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
        msg.address_lo |= MSI_ADDR_DEST_ID(dest);
 
        write_msi_msg_desc(desc, &msg);
+
+       return 0;
 }
 #ifdef CONFIG_INTR_REMAP
 /*
  * Migrate the MSI irq to another cpumask. This migration is
  * done in the process context using interrupt-remapping hardware.
  */
-static void
+static int
 ir_set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
 {
        struct irq_desc *desc = irq_to_desc(irq);
@@ -3354,11 +3364,11 @@ ir_set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
        struct irte irte;
 
        if (get_irte(irq, &irte))
-               return;
+               return -1;
 
        dest = set_desc_affinity(desc, mask);
        if (dest == BAD_APICID)
-               return;
+               return -1;
 
        irte.vector = cfg->vector;
        irte.dest_id = IRTE_DEST(dest);
@@ -3375,6 +3385,8 @@ ir_set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
         */
        if (cfg->move_in_progress)
                send_cleanup_vector(cfg);
+
+       return 0;
 }
 
 #endif
@@ -3528,7 +3540,7 @@ void arch_teardown_msi_irq(unsigned int irq)
 
 #if defined (CONFIG_DMAR) || defined (CONFIG_INTR_REMAP)
 #ifdef CONFIG_SMP
-static void dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
+static int dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
        struct irq_desc *desc = irq_to_desc(irq);
        struct irq_cfg *cfg;
@@ -3537,7 +3549,7 @@ static void dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
 
        dest = set_desc_affinity(desc, mask);
        if (dest == BAD_APICID)
-               return;
+               return -1;
 
        cfg = desc->chip_data;
 
@@ -3549,6 +3561,8 @@ static void dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
        msg.address_lo |= MSI_ADDR_DEST_ID(dest);
 
        dmar_msi_write(irq, &msg);
+
+       return 0;
 }
 
 #endif /* CONFIG_SMP */
@@ -3582,7 +3596,7 @@ int arch_setup_dmar_msi(unsigned int irq)
 #ifdef CONFIG_HPET_TIMER
 
 #ifdef CONFIG_SMP
-static void hpet_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
+static int hpet_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
        struct irq_desc *desc = irq_to_desc(irq);
        struct irq_cfg *cfg;
@@ -3591,7 +3605,7 @@ static void hpet_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
 
        dest = set_desc_affinity(desc, mask);
        if (dest == BAD_APICID)
-               return;
+               return -1;
 
        cfg = desc->chip_data;
 
@@ -3603,6 +3617,8 @@ static void hpet_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
        msg.address_lo |= MSI_ADDR_DEST_ID(dest);
 
        hpet_msi_write(irq, &msg);
+
+       return 0;
 }
 
 #endif /* CONFIG_SMP */
@@ -3659,7 +3675,7 @@ static void target_ht_irq(unsigned int irq, unsigned int dest, u8 vector)
        write_ht_irq_msg(irq, &msg);
 }
 
-static void set_ht_irq_affinity(unsigned int irq, const struct cpumask *mask)
+static int set_ht_irq_affinity(unsigned int irq, const struct cpumask *mask)
 {
        struct irq_desc *desc = irq_to_desc(irq);
        struct irq_cfg *cfg;
@@ -3667,11 +3683,13 @@ static void set_ht_irq_affinity(unsigned int irq, const struct cpumask *mask)
 
        dest = set_desc_affinity(desc, mask);
        if (dest == BAD_APICID)
-               return;
+               return -1;
 
        cfg = desc->chip_data;
 
        target_ht_irq(irq, dest, cfg->vector);
+
+       return 0;
 }
 
 #endif

diff --git a/drivers/parisc/iosapic.c b/drivers/parisc/iosapic.c
index 73348c4..4a9cc92 100644 (file)
--- a/drivers/parisc/iosapic.c
+++ b/drivers/parisc/iosapic.c
@@ -702,7 +702,7 @@ static unsigned int iosapic_startup_irq(unsigned int irq)
 }
 
 #ifdef CONFIG_SMP
-static void iosapic_set_affinity_irq(unsigned int irq,
+static int iosapic_set_affinity_irq(unsigned int irq,
                                     const struct cpumask *dest)
 {
        struct vector_info *vi = iosapic_get_vector(irq);
@@ -712,7 +712,7 @@ static void iosapic_set_affinity_irq(unsigned int irq,
 
        dest_cpu = cpu_check_affinity(irq, dest);
        if (dest_cpu < 0)
-               return;
+               return -1;
 
        cpumask_copy(irq_desc[irq].affinity, cpumask_of(dest_cpu));
        vi->txn_addr = txn_affinity_addr(irq, dest_cpu);
@@ -724,6 +724,8 @@ static void iosapic_set_affinity_irq(unsigned int irq,
        iosapic_set_irt_data(vi, &dummy_d0, &d1);
        iosapic_wr_irt_entry(vi, d0, d1);
        spin_unlock_irqrestore(&iosapic_lock, flags);
+
+       return 0;
 }
 #endif
 

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 30963af..3338988 100644 (file)
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -688,13 +688,13 @@ void rebind_evtchn_irq(int evtchn, int irq)
 }
 
 /* Rebind an evtchn so that it gets delivered to a specific cpu */
-static void rebind_irq_to_cpu(unsigned irq, unsigned tcpu)
+static int rebind_irq_to_cpu(unsigned irq, unsigned tcpu)
 {
        struct evtchn_bind_vcpu bind_vcpu;
        int evtchn = evtchn_from_irq(irq);
 
        if (!VALID_EVTCHN(evtchn))
-               return;
+               return -1;
 
        /* Send future instances of this interrupt to other vcpu. */
        bind_vcpu.port = evtchn;
@@ -707,13 +707,15 @@ static void rebind_irq_to_cpu(unsigned irq, unsigned tcpu)
         */
        if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_vcpu, &bind_vcpu) >= 0)
                bind_evtchn_to_cpu(evtchn, tcpu);
-}
 
+       return 0;
+}
 
-static void set_affinity_irq(unsigned irq, const struct cpumask *dest)
+static int set_affinity_irq(unsigned irq, const struct cpumask *dest)
 {
        unsigned tcpu = cpumask_first(dest);
-       rebind_irq_to_cpu(irq, tcpu);
+
+       return rebind_irq_to_cpu(irq, tcpu);
 }
 
 int resend_irq_on_evtchn(unsigned int irq)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 2a34cd6..8e4c18b 100644 (file)
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -117,7 +117,7 @@ struct irq_chip {
        void            (*eoi)(unsigned int irq);
 
        void            (*end)(unsigned int irq);
-       void            (*set_affinity)(unsigned int irq,
+       int             (*set_affinity)(unsigned int irq,
                                        const struct cpumask *dest);
        int             (*retrigger)(unsigned int irq);
        int             (*set_type)(unsigned int irq, unsigned int flow_type);