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authorJiSheng Zhang <jszhang3@mail.ustc.edu.cn>2008-07-19 03:35:41 -0400
committerStefan Richter <stefanr@s5r6.in-berlin.de>2008-07-20 09:25:03 -0400
commitf9543d0ab6392a9a5bff0034622688dc10d9d225 (patch)
tree44587aa693b3fe444cab25aaad2c6c5e95f5f4ee /drivers/firewire
parent1e8afea124added6409d5209f90d9949f5a13b32 (diff)
firewire: queue the right number of data
There will be 4 padding bytes in struct fw_cdev_event_response on some platforms The member:__u32 data will point to these padding bytes. While queue the response and data in complete_transaction in fw-cdev.c, it will queue like this: |response(excluding padding bytes)|4 padding bytes|4 padding bytes|data. It queue 4 extra bytes. That is to say it use "&response + sizeof(response)" while other place of kernel and userspace library use "&response + offsetof (typeof(response), data)". So it will lost the last 4 bytes of data. This patch can fix it while not changing the struct definition. Signed-off-by: JiSheng Zhang <jszhang3@mail.ustc.edu.cn> This fixes responses to outbound block read requests on 64bit architectures. Tested on i686, x86-64, and x86-64 with i686 userland, using firecontrol and gscanbus. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/fw-cdev.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c
index c639915fc3cb..bc81d6fcd2fd 100644
--- a/drivers/firewire/fw-cdev.c
+++ b/drivers/firewire/fw-cdev.c
@@ -382,9 +382,9 @@ complete_transaction(struct fw_card *card, int rcode,
382 382
383 response->response.type = FW_CDEV_EVENT_RESPONSE; 383 response->response.type = FW_CDEV_EVENT_RESPONSE;
384 response->response.rcode = rcode; 384 response->response.rcode = rcode;
385 queue_event(client, &response->event, 385 queue_event(client, &response->event, &response->response,
386 &response->response, sizeof(response->response), 386 sizeof(response->response) + response->response.length,
387 response->response.data, response->response.length); 387 NULL, 0);
388} 388}
389 389
390static int ioctl_send_request(struct client *client, void *buffer) 390static int ioctl_send_request(struct client *client, void *buffer)