After upgrading kernel from 2.6.25-gentoo-r8 to 2.6.27-gentoo-r7 my stir4200 based adapter does not work with ircomm-tty layer (discovery works but no actual data can be sent/received). Same results with ks959-sir adapter and Ubuntu Intrepid stock kernel (also 2.6.27-something). Bug already documented here: http://bugzilla.kernel.org/show_bug.cgi?id=11795 I've applied recommended patch http://git.kernel.org/?p=linux/kernel/git/davem/net-2.6.git;a=commit;h=69c30e1e7492192f882a3fc11888b320fde5206a and it solved this issue for me. Probably this fix should be included in gentoo-sources. Reproducible: Always
fixed in gentoo-sources-2.6.27-r8