diff options
Diffstat (limited to 'drivers/pnp')
| -rw-r--r-- | drivers/pnp/system.c | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/drivers/pnp/system.c b/drivers/pnp/system.c index 49c1720df59a..515f33882ab8 100644 --- a/drivers/pnp/system.c +++ b/drivers/pnp/system.c @@ -7,6 +7,7 @@ * Bjorn Helgaas <bjorn.helgaas@hp.com> */ +#include <linux/acpi.h> #include <linux/pnp.h> #include <linux/device.h> #include <linux/init.h> @@ -22,25 +23,41 @@ static const struct pnp_device_id pnp_dev_table[] = { {"", 0} }; +#ifdef CONFIG_ACPI +static bool __reserve_range(u64 start, unsigned int length, bool io, char *desc) +{ + u8 space_id = io ? ACPI_ADR_SPACE_SYSTEM_IO : ACPI_ADR_SPACE_SYSTEM_MEMORY; + return !acpi_reserve_region(start, length, space_id, IORESOURCE_BUSY, desc); +} +#else +static bool __reserve_range(u64 start, unsigned int length, bool io, char *desc) +{ + struct resource *res; + + res = io ? request_region(start, length, desc) : + request_mem_region(start, length, desc); + if (res) { + res->flags &= ~IORESOURCE_BUSY; + return true; + } + return false; +} +#endif + static void reserve_range(struct pnp_dev *dev, struct resource *r, int port) { char *regionid; const char *pnpid = dev_name(&dev->dev); resource_size_t start = r->start, end = r->end; - struct resource *res; + bool reserved; regionid = kmalloc(16, GFP_KERNEL); if (!regionid) return; snprintf(regionid, 16, "pnp %s", pnpid); - if (port) - res = request_region(start, end - start + 1, regionid); - else - res = request_mem_region(start, end - start + 1, regionid); - if (res) - res->flags &= ~IORESOURCE_BUSY; - else + reserved = __reserve_range(start, end - start + 1, !!port, regionid); + if (!reserved) kfree(regionid); /* @@ -49,7 +66,7 @@ static void reserve_range(struct pnp_dev *dev, struct resource *r, int port) * have double reservations. */ dev_info(&dev->dev, "%pR %s reserved\n", r, - res ? "has been" : "could not be"); + reserved ? "has been" : "could not be"); } static void reserve_resources_of_dev(struct pnp_dev *dev) |