diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2010-04-26 16:08:27 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-04-26 16:08:27 +0900 |
| commit | e19553427c2e8fdb04fdd98e407164bb59a840ba (patch) | |
| tree | 5332234b2dad07c03c27e4608afb16f297f41e61 /arch/mips/pci/ops-loongson2.c | |
| parent | 35f6cd4a06432034665a1499ca4b022437423aac (diff) | |
| parent | 83515bc7df812555e20cda48614674e2f346f9f5 (diff) | |
Merge branch 'sh/stable-updates'
Conflicts:
arch/sh/kernel/dwarf.c
drivers/dma/shdma.c
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/mips/pci/ops-loongson2.c')
| -rw-r--r-- | arch/mips/pci/ops-loongson2.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/mips/pci/ops-loongson2.c b/arch/mips/pci/ops-loongson2.c index 2bb4057bf6c..d657ee0bc13 100644 --- a/arch/mips/pci/ops-loongson2.c +++ b/arch/mips/pci/ops-loongson2.c @@ -180,15 +180,21 @@ struct pci_ops loongson_pci_ops = { }; #ifdef CONFIG_CS5536 +DEFINE_RAW_SPINLOCK(msr_lock); + void _rdmsr(u32 msr, u32 *hi, u32 *lo) { struct pci_bus bus = { .number = PCI_BUS_CS5536 }; u32 devfn = PCI_DEVFN(PCI_IDSEL_CS5536, 0); + unsigned long flags; + + raw_spin_lock_irqsave(&msr_lock, flags); loongson_pcibios_write(&bus, devfn, PCI_MSR_ADDR, 4, msr); loongson_pcibios_read(&bus, devfn, PCI_MSR_DATA_LO, 4, lo); loongson_pcibios_read(&bus, devfn, PCI_MSR_DATA_HI, 4, hi); + raw_spin_unlock_irqrestore(&msr_lock, flags); } EXPORT_SYMBOL(_rdmsr); @@ -198,9 +204,13 @@ void _wrmsr(u32 msr, u32 hi, u32 lo) .number = PCI_BUS_CS5536 }; u32 devfn = PCI_DEVFN(PCI_IDSEL_CS5536, 0); + unsigned long flags; + + raw_spin_lock_irqsave(&msr_lock, flags); loongson_pcibios_write(&bus, devfn, PCI_MSR_ADDR, 4, msr); loongson_pcibios_write(&bus, devfn, PCI_MSR_DATA_LO, 4, lo); loongson_pcibios_write(&bus, devfn, PCI_MSR_DATA_HI, 4, hi); + raw_spin_unlock_irqrestore(&msr_lock, flags); } EXPORT_SYMBOL(_wrmsr); #endif |