diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/acconfig.h | 4 | ||||
| -rw-r--r-- | drivers/acpi/acpica/exregion.c | 35 | ||||
| -rw-r--r-- | drivers/acpi/power_meter.c | 6 | ||||
| -rw-r--r-- | drivers/acpi/proc.c | 2 | ||||
| -rw-r--r-- | drivers/acpi/processor_core.c | 2 | ||||
| -rw-r--r-- | drivers/acpi/processor_throttling.c | 6 | ||||
| -rw-r--r-- | drivers/acpi/video.c | 8 |
7 files changed, 41 insertions, 22 deletions
diff --git a/drivers/acpi/acpica/acconfig.h b/drivers/acpi/acpica/acconfig.h index 8e679ef5b23..a4471e3d385 100644 --- a/drivers/acpi/acpica/acconfig.h +++ b/drivers/acpi/acpica/acconfig.h @@ -103,9 +103,9 @@ #define ACPI_MAX_REFERENCE_COUNT 0x1000 -/* Size of cached memory mapping for system memory operation region */ +/* Default page size for use in mapping memory for operation regions */ -#define ACPI_SYSMEM_REGION_WINDOW_SIZE 4096 +#define ACPI_DEFAULT_PAGE_SIZE 4096 /* Must be power of 2 */ /* owner_id tracking. 8 entries allows for 255 owner_ids */ diff --git a/drivers/acpi/acpica/exregion.c b/drivers/acpi/acpica/exregion.c index 3a54b737d2d..2bd83ac57c3 100644 --- a/drivers/acpi/acpica/exregion.c +++ b/drivers/acpi/acpica/exregion.c @@ -77,7 +77,8 @@ acpi_ex_system_memory_space_handler(u32 function, void *logical_addr_ptr = NULL; struct acpi_mem_space_context *mem_info = region_context; u32 length; - acpi_size window_size; + acpi_size map_length; + acpi_size page_boundary_map_length; #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED u32 remainder; #endif @@ -144,25 +145,39 @@ acpi_ex_system_memory_space_handler(u32 function, } /* - * Don't attempt to map memory beyond the end of the region, and - * constrain the maximum mapping size to something reasonable. + * Attempt to map from the requested address to the end of the region. + * However, we will never map more than one page, nor will we cross + * a page boundary. */ - window_size = (acpi_size) + map_length = (acpi_size) ((mem_info->address + mem_info->length) - address); - if (window_size > ACPI_SYSMEM_REGION_WINDOW_SIZE) { - window_size = ACPI_SYSMEM_REGION_WINDOW_SIZE; + /* + * If mapping the entire remaining portion of the region will cross + * a page boundary, just map up to the page boundary, do not cross. + * On some systems, crossing a page boundary while mapping regions + * can cause warnings if the pages have different attributes + * due to resource management + */ + page_boundary_map_length = + ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address; + + if (!page_boundary_map_length) { + page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE; + } + + if (map_length > page_boundary_map_length) { + map_length = page_boundary_map_length; } /* Create a new mapping starting at the address given */ - mem_info->mapped_logical_address = - acpi_os_map_memory((acpi_physical_address) address, window_size); + mem_info->mapped_logical_address = acpi_os_map_memory((acpi_physical_address) address, map_length); if (!mem_info->mapped_logical_address) { ACPI_ERROR((AE_INFO, "Could not map memory at %8.8X%8.8X, size %X", ACPI_FORMAT_NATIVE_UINT(address), - (u32) window_size)); + (u32) map_length)); mem_info->mapped_length = 0; return_ACPI_STATUS(AE_NO_MEMORY); } @@ -170,7 +185,7 @@ acpi_ex_system_memory_space_handler(u32 function, /* Save the physical address and mapping size */ mem_info->mapped_physical_address = address; - mem_info->mapped_length = window_size; + mem_info->mapped_length = map_length; } /* diff --git a/drivers/acpi/power_meter.c b/drivers/acpi/power_meter.c index e6bfd77986b..2ef7030a0c2 100644 --- a/drivers/acpi/power_meter.c +++ b/drivers/acpi/power_meter.c @@ -294,7 +294,11 @@ static int set_acpi_trip(struct acpi_power_meter_resource *resource) return -EINVAL; } - return data; + /* _PTP returns 0 on success, nonzero otherwise */ + if (data) + return -EINVAL; + + return 0; } static ssize_t set_trip(struct device *dev, struct device_attribute *devattr, diff --git a/drivers/acpi/proc.c b/drivers/acpi/proc.c index f8b6f555ba5..d0d25e2e1ce 100644 --- a/drivers/acpi/proc.c +++ b/drivers/acpi/proc.c @@ -393,7 +393,7 @@ acpi_system_write_wakeup_device(struct file *file, struct list_head *node, *next; char strbuf[5]; char str[5] = ""; - int len = count; + unsigned int len = count; struct acpi_device *found_dev = NULL; if (len > 4) diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c index c567b46dfa0..ec742a4e563 100644 --- a/drivers/acpi/processor_core.c +++ b/drivers/acpi/processor_core.c @@ -770,7 +770,7 @@ static struct notifier_block acpi_cpu_notifier = .notifier_call = acpi_cpu_soft_notify, }; -static int acpi_processor_add(struct acpi_device *device) +static int __cpuinit acpi_processor_add(struct acpi_device *device) { struct acpi_processor *pr = NULL; int result = 0; diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c index 4c6c14c1e30..1c5d7a8b2fd 100644 --- a/drivers/acpi/processor_throttling.c +++ b/drivers/acpi/processor_throttling.c @@ -1133,15 +1133,15 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr) int result = 0; struct acpi_processor_throttling *pthrottling; + if (!pr) + return -EINVAL; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n", pr->throttling.address, pr->throttling.duty_offset, pr->throttling.duty_width)); - if (!pr) - return -EINVAL; - /* * Evaluate _PTC, _TSS and _TPC * They must all be present or none of them can be used. diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 64e3c581b7a..05dff631591 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -1223,7 +1223,7 @@ acpi_video_device_write_state(struct file *file, u32 state = 0; - if (!dev || count + 1 > sizeof str) + if (!dev || count >= sizeof(str)) return -EINVAL; if (copy_from_user(str, buffer, count)) @@ -1280,7 +1280,7 @@ acpi_video_device_write_brightness(struct file *file, int i; - if (!dev || !dev->brightness || count + 1 > sizeof str) + if (!dev || !dev->brightness || count >= sizeof(str)) return -EINVAL; if (copy_from_user(str, buffer, count)) @@ -1562,7 +1562,7 @@ acpi_video_bus_write_POST(struct file *file, unsigned long long opt, options; - if (!video || count + 1 > sizeof str) + if (!video || count >= sizeof(str)) return -EINVAL; status = acpi_video_bus_POST_options(video, &options); @@ -1602,7 +1602,7 @@ acpi_video_bus_write_DOS(struct file *file, unsigned long opt; - if (!video || count + 1 > sizeof str) + if (!video || count >= sizeof(str)) return -EINVAL; if (copy_from_user(str, buffer, count)) |