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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2025-06-15 16:32:53 +0300 |
|---|---|---|
| committer | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2025-06-15 16:40:29 +0300 |
| commit | aef6bcc0f278eba408751f8b3e0beae992e9faec (patch) | |
| tree | 4a4d2b6dea3c39b3b19c75acd3bc67f9393d3659 /include | |
| parent | 57e6d9f85fff3a71e667628474063c1bbb2fad20 (diff) | |
| download | linux-aef6bcc0f278eba408751f8b3e0beae992e9faec.tar.xz | |
firewire: ohci: use workqueue to handle events of AT request/response contexts
This commit adds a work item to handle events of 1394 OHCI AT
request/response contexts, and queues the item to the specific
workqueue. The call of struct fw_packet.callbaqck() is done in the
workqueue when receiving acknowledgement to the asynchronous packet
transferred to remote node.
Link: https://lore.kernel.org/r/20250615133253.433057-4-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/firewire.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/firewire.h b/include/linux/firewire.h index c55b8e30e700..cceb70415ed2 100644 --- a/include/linux/firewire.h +++ b/include/linux/firewire.h @@ -308,8 +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; @@ -382,6 +381,10 @@ 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, @@ -411,6 +414,10 @@ 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, |