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authorClemens Ladisch <clemens@ladisch.de>2011-02-23 09:27:40 +0100
committerStefan Richter <stefanr@s5r6.in-berlin.de>2011-02-26 15:11:04 +0100
commit44b74d909dc943fd9384930a141450cb17133511 (patch)
tree19861b5b1213d6f0e9571f6c640095f7d74b642c /drivers/vlynq
parente81cbebdfc384f9c2ae91225f16ef994118e5e2c (diff)
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firewire: ohci: prevent starting of iso contexts with empty queue
If a misguided program tried to start an isochronous context before it has queued any packets, the call would appear to succeed, but the context would not actually go into the running state, and the OHCI controller would then raise an unrecoverableError interrupt because the first Z value is zero and thus invalid. The driver logs such errors, but there is no mechanism to report this back to the program. Add an explicit check so that this error can be returned synchronously. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/vlynq')
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