From 1146fe30504a1edd8a434f500e1be139492570c9 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Fri, 21 Sep 2007 17:13:55 +0100 Subject: [MIPS] SMTC: Make ack_bad_irq() safe with no IM backstop. Issue reported and original patch by Kevin Kissel, cleaner (imho) implementation by me. Signed-off-by: Ralf Baechle --- arch/mips/kernel/i8259.c | 5 +---- arch/mips/kernel/irq-msc01.c | 10 ++-------- arch/mips/kernel/irq.c | 10 +--------- arch/mips/kernel/smtc.c | 5 ++++- 4 files changed, 8 insertions(+), 22 deletions(-) (limited to 'arch') diff --git a/arch/mips/kernel/i8259.c b/arch/mips/kernel/i8259.c index b6c3080..3a2d255 100644 --- a/arch/mips/kernel/i8259.c +++ b/arch/mips/kernel/i8259.c @@ -177,10 +177,7 @@ handle_real_irq: outb(cached_master_mask, PIC_MASTER_IMR); outb(0x60+irq,PIC_MASTER_CMD); /* 'Specific EOI to master */ } -#ifdef CONFIG_MIPS_MT_SMTC - if (irq_hwmask[irq] & ST0_IM) - set_c0_status(irq_hwmask[irq] & ST0_IM); -#endif /* CONFIG_MIPS_MT_SMTC */ + smtc_im_ack_irq(irq); spin_unlock_irqrestore(&i8259A_lock, flags); return; diff --git a/arch/mips/kernel/irq-msc01.c b/arch/mips/kernel/irq-msc01.c index 410868b..1ecdd50 100644 --- a/arch/mips/kernel/irq-msc01.c +++ b/arch/mips/kernel/irq-msc01.c @@ -52,11 +52,8 @@ static void level_mask_and_ack_msc_irq(unsigned int irq) mask_msc_irq(irq); if (!cpu_has_veic) MSCIC_WRITE(MSC01_IC_EOI, 0); -#ifdef CONFIG_MIPS_MT_SMTC /* This actually needs to be a call into platform code */ - if (irq_hwmask[irq] & ST0_IM) - set_c0_status(irq_hwmask[irq] & ST0_IM); -#endif /* CONFIG_MIPS_MT_SMTC */ + smtc_im_ack_irq(irq); } /* @@ -73,10 +70,7 @@ static void edge_mask_and_ack_msc_irq(unsigned int irq) MSCIC_WRITE(MSC01_IC_SUP+irq*8, r | ~MSC01_IC_SUP_EDGE_BIT); MSCIC_WRITE(MSC01_IC_SUP+irq*8, r); } -#ifdef CONFIG_MIPS_MT_SMTC - if (irq_hwmask[irq] & ST0_IM) - set_c0_status(irq_hwmask[irq] & ST0_IM); -#endif /* CONFIG_MIPS_MT_SMTC */ + smtc_im_ack_irq(irq); } /* diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c index aeded6c..a990aad 100644 --- a/arch/mips/kernel/irq.c +++ b/arch/mips/kernel/irq.c @@ -74,20 +74,12 @@ EXPORT_SYMBOL_GPL(free_irqno); */ void ack_bad_irq(unsigned int irq) { + smtc_im_ack_irq(irq); printk("unexpected IRQ # %d\n", irq); } atomic_t irq_err_count; -#ifdef CONFIG_MIPS_MT_SMTC -/* - * SMTC Kernel needs to manipulate low-level CPU interrupt mask - * in do_IRQ. These are passed in setup_irq_smtc() and stored - * in this table. - */ -unsigned long irq_hwmask[NR_IRQS]; -#endif /* CONFIG_MIPS_MT_SMTC */ - /* * Generic, controller-independent functions: */ diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c index 43826c1..f094043 100644 --- a/arch/mips/kernel/smtc.c +++ b/arch/mips/kernel/smtc.c @@ -25,8 +25,11 @@ #include /* - * This file should be built into the kernel only if CONFIG_MIPS_MT_SMTC is set. + * SMTC Kernel needs to manipulate low-level CPU interrupt mask + * in do_IRQ. These are passed in setup_irq_smtc() and stored + * in this table. */ +unsigned long irq_hwmask[NR_IRQS]; #define LOCK_MT_PRA() \ local_irq_save(flags); \ -- cgit v1.1