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firewire: Implement proper transaction cancelation.

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Drivers such as fw-sbp2 had no way to properly cancel in-progress
transactions, which could leave a pending transaction or an unset
packet in the low-level queues after kfree'ing the containing
structure. fw_cancel_transaction() lets drivers cancel a submitted
transaction.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Kristian Høgsberg
2007-02-06 14:49:32 -05:00
committed by Stefan Richter
parent 72e318e07e
commit 730c32f58b
5 changed files with 95 additions and 7 deletions
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5
drivers/firewire/fw-transaction.h
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@@ -391,6 +391,8 @@ struct fw_card_driver {
void (*send_request) (struct fw_card *card, struct fw_packet *packet);
void (*send_response) (struct fw_card *card, struct fw_packet *packet);
/* Calling cancel is valid once a packet has been submitted. */
int (*cancel_packet) (struct fw_card *card, struct fw_packet *packet);
/* Allow the specified node ID to do direct DMA out and in of
* host memory. The card will disable this for all node when
@@ -421,6 +423,9 @@ fw_send_request(struct fw_card *card, struct fw_transaction *t,
void *data, size_t length,
fw_transaction_callback_t callback, void *callback_data);
int fw_cancel_transaction(struct fw_card *card,
struct fw_transaction *transaction);
void fw_flush_transactions(struct fw_card *card);
void fw_send_phy_config(struct fw_card *card,