diff options
Diffstat (limited to 'drivers/firewire/fw-device.h')
| -rw-r--r-- | drivers/firewire/fw-device.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/firewire/fw-device.h b/drivers/firewire/fw-device.h index 0d771fda86de..5f131f5129da 100644 --- a/drivers/firewire/fw-device.h +++ b/drivers/firewire/fw-device.h @@ -21,6 +21,7 @@ #include <linux/fs.h> #include <linux/cdev.h> +#include <linux/rwsem.h> #include <asm/atomic.h> enum fw_device_state { @@ -46,6 +47,11 @@ struct fw_attribute_group { * fw_device.node_id is guaranteed to be current too. * * The same applies to fw_device.card->node_id vs. fw_device.generation. + * + * fw_device.config_rom and fw_device.config_rom_length may be accessed during + * the lifetime of any fw_unit belonging to the fw_device, before device_del() + * was called on the last fw_unit. Alternatively, they may be accessed while + * holding fw_device_rwsem. */ struct fw_device { atomic_t state; @@ -53,6 +59,7 @@ struct fw_device { int node_id; int generation; unsigned max_speed; + bool cmc; struct fw_card *card; struct device device; struct list_head link; @@ -92,8 +99,12 @@ int fw_device_enable_phys_dma(struct fw_device *device); void fw_device_cdev_update(struct fw_device *device); void fw_device_cdev_remove(struct fw_device *device); +extern struct rw_semaphore fw_device_rwsem; extern int fw_cdev_major; +/* + * fw_unit.directory must not be accessed after device_del(&fw_unit.device). + */ struct fw_unit { struct device device; u32 *directory; |