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authorStefan Richter <stefanr@s5r6.in-berlin.de>2007-07-17 02:15:36 +0200
committerStefan Richter <stefanr@s5r6.in-berlin.de>2007-07-18 23:53:28 +0200
commit9c9bdf4d50730fd04b06077e22d7a83b585f26b5 (patch)
treea7d78a732aa2502a4e43d5a5c56966b17b51a4c8
parent5d59a6f1ba90f15132d55d9d4d5a632f15a43d84 (diff)
firewire: fix memory leak of fw_request instances
Found and debugged by Jay Fenlason <fenlason@redhat.com>. The bug was especially noticeable with direct I/O over fw-sbp2. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
-rw-r--r--drivers/firewire/fw-transaction.c4
-rw-r--r--drivers/firewire/fw-transaction.h4
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index c4b3417a5da..3ce8e2fbe15 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -605,8 +605,10 @@ fw_send_response(struct fw_card *card, struct fw_request *request, int rcode)
* check is sufficient to ensure we don't send response to
* broadcast packets or posted writes.
*/
- if (request->ack != ACK_PENDING)
+ if (request->ack != ACK_PENDING) {
+ kfree(request);
return;
+ }
if (rcode == RCODE_COMPLETE)
fw_fill_response(&request->response, request->request_header,
diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h
index 5abed193f4a..5ceaccd1056 100644
--- a/drivers/firewire/fw-transaction.h
+++ b/drivers/firewire/fw-transaction.h
@@ -123,6 +123,10 @@ typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode,
size_t length,
void *callback_data);
+/*
+ * Important note: The callback must guarantee that either fw_send_response()
+ * or kfree() is called on the @request.
+ */
typedef void (*fw_address_callback_t)(struct fw_card *card,
struct fw_request *request,
int tcode, int destination, int source,