diff options
Diffstat (limited to 'drivers/char/hpet.c')
| -rw-r--r-- | drivers/char/hpet.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index 448ce5e29c56..5d9c31dfc905 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -367,12 +367,29 @@ static unsigned int hpet_poll(struct file *file, poll_table * wait) return 0; } +#ifdef CONFIG_HPET_MMAP +#ifdef CONFIG_HPET_MMAP_DEFAULT +static int hpet_mmap_enabled = 1; +#else +static int hpet_mmap_enabled = 0; +#endif + +static __init int hpet_mmap_enable(char *str) +{ + get_option(&str, &hpet_mmap_enabled); + pr_info("HPET mmap %s\n", hpet_mmap_enabled ? "enabled" : "disabled"); + return 1; +} +__setup("hpet_mmap", hpet_mmap_enable); + static int hpet_mmap(struct file *file, struct vm_area_struct *vma) { -#ifdef CONFIG_HPET_MMAP struct hpet_dev *devp; unsigned long addr; + if (!hpet_mmap_enabled) + return -EACCES; + devp = file->private_data; addr = devp->hd_hpets->hp_hpet_phys; @@ -381,10 +398,13 @@ static int hpet_mmap(struct file *file, struct vm_area_struct *vma) vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); return vm_iomap_memory(vma, addr, PAGE_SIZE); +} #else +static int hpet_mmap(struct file *file, struct vm_area_struct *vma) +{ return -ENOSYS; -#endif } +#endif static int hpet_fasync(int fd, struct file *file, int on) { @@ -486,8 +506,7 @@ static int hpet_ioctl_ieon(struct hpet_dev *devp) } sprintf(devp->hd_name, "hpet%d", (int)(devp - hpetp->hp_dev)); - irq_flags = devp->hd_flags & HPET_SHARED_IRQ - ? IRQF_SHARED : IRQF_DISABLED; + irq_flags = devp->hd_flags & HPET_SHARED_IRQ ? IRQF_SHARED : 0; if (request_irq(irq, hpet_interrupt, irq_flags, devp->hd_name, (void *)devp)) { printk(KERN_ERR "hpet: IRQ %d is not free\n", irq); @@ -971,8 +990,6 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data) struct acpi_resource_fixed_memory32 *fixmem32; fixmem32 = &res->data.fixed_memory32; - if (!fixmem32) - return AE_NO_MEMORY; hdp->hd_phys_address = fixmem32->address; hdp->hd_address = ioremap(fixmem32->address, |