On Thu, 03 Aug 2017 13:20:39 +0200, Takashi Sakamoto wrote: > > Hi, > > In a design of ALSA control core, each set of elements have data of > Type-Length-Value shape. This is called as TLV data. In ALSA control > interface, applications can three types of requests to elements about > TLV data; read, write and command. > > In current implementation of ALSA control core, these three requests > are handled with read lock of a counting semaphore. However, this has an > issue of concurrent access because in theory write/command requests have > sub-effects to change state of the set of elements in a point of TLV data. > Read requests and write/command requests are handled exclusively as well > as each write/command requests. > > This patchset is for this purpose. Additionally, this applies code > refactoring to TLV ioctl handler and TLV handler for user-defined element > set so that they get better shape for readers. Taking the rw mutex outside snd_ctl_tlv_ioctl() is a good idea. It simplified things a lot, indeed. Now applied all patches. Thanks! Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
