diff options
Diffstat (limited to 'include/linux/firewire.h')
| -rw-r--r-- | include/linux/firewire.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/include/linux/firewire.h b/include/linux/firewire.h index b632eec3ab52..d38c6e538e5c 100644 --- a/include/linux/firewire.h +++ b/include/linux/firewire.h @@ -136,6 +136,7 @@ struct fw_card { __be32 maint_utility_register; struct workqueue_struct *isoc_wq; + struct workqueue_struct *async_wq; }; static inline struct fw_card *fw_card_get(struct fw_card *card) @@ -307,8 +308,7 @@ struct fw_packet { * For successful transmission, the status code is the ack received * from the destination. Otherwise it is one of the juju-specific * rcodes: RCODE_SEND_ERROR, _CANCELLED, _BUSY, _GENERATION, _NO_ACK. - * The callback can be called from tasklet context and thus - * must never block. + * The callback can be called from workqueue and thus must never block. */ fw_packet_callback_t callback; int ack; @@ -341,7 +341,11 @@ struct fw_address_handler { u64 length; fw_address_callback_t address_callback; void *callback_data; + + // Only for core functions. struct list_head link; + struct kref kref; + struct completion done; }; struct fw_address_region { @@ -381,6 +385,10 @@ void __fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode * * A variation of __fw_send_request() to generate callback for response subaction without time * stamp. + * + * The callback is invoked in the workqueue context in most cases. However, if an error is detected + * before queueing or the destination address refers to the local node, it is invoked in the + * current context instead. */ static inline void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode, int destination_id, int generation, int speed, @@ -410,6 +418,10 @@ static inline void fw_send_request(struct fw_card *card, struct fw_transaction * * @callback_data: data to be passed to the transaction completion callback * * A variation of __fw_send_request() to generate callback for response subaction with time stamp. + * + * The callback is invoked in the workqueue context in most cases. However, if an error is detected + * before queueing or the destination address refers to the local node, it is invoked in the current + * context instead. */ static inline void fw_send_request_with_tstamp(struct fw_card *card, struct fw_transaction *t, int tcode, int destination_id, int generation, int speed, unsigned long long offset, |