firewire: prevent dropping of completed iso packet header data
authorClemens Ladisch <clemens@ladisch.de>
Sun, 18 Mar 2012 18:05:29 +0000 (19:05 +0100)
committerStefan Richter <stefanr@s5r6.in-berlin.de>
Sun, 18 Mar 2012 21:15:39 +0000 (22:15 +0100)
commit18d627113b830cda80792e96b28341bcd41cf40c
tree44281ec110668e9f7a583303b28ba2ca47012a20
parent910e76c607546ead218de8b11c32597d6b8fe7e4
firewire: prevent dropping of completed iso packet header data

The buffer for the header data of completed iso packets has a fixed
size, so it is possible to configure a stream with a big interval
between interrupt packets or with big headers so that this buffer would
overflow.  Previously, ohci.c would drop any data that would not fit,
but this could make unsuspecting applications believe that fewer than
the actual number of packets have completed.

Instead of dropping data, add calls to flush_iso_completion() so that
there are as many events as needed to report all of the data.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
drivers/firewire/core-cdev.c
drivers/firewire/ohci.c
include/linux/firewire-cdev.h