This patch corrects the following: - This patch is an upgrade/replacement for the OTTO/OPPO ATM driver and fixes a number of flow control and signalling problems. If you are seeing "No Buffer Space" messages, experiencing pauses or hangs when receiving data on signalling/ilmi pvc's, or have any problems with FLOWMASTER flow control with CLIP or LANE over ATM, you should install this patch. - Fixes two problems with the ATM 350 driver. On reboot, a panic could be encountered before getting into single user mode. The panic would occur inside the ltaintr routine and this routine would be noted in the dump stack trace. This problem was seen on Personal Workstation 500ua (MIATA) and the ATM 350 card. The second problem is a panic: thread_block: interrupt level call when rt_preempt_opt (REALTIME preemption) is enabled. A typical stack trace would look like this for the top of the stack: panic thread_block() thread_preempt() panic thread_block() unix_release_force() unix_release() schedtransmit() softclock_scan() or this: panic thread_block() thread_preempt() panic thread_block() unix_release_force() unix_release() ottooutput() atm_cmm_send() - Fixes two problems with the ATM 350 driver. - On reboot, a panic could be encountered before getting into single user mode. The panic would occur inside the ltaintr routine and this routine would be noted in the dump stack trace. This problem was seen on Personal Workstation 500ua (MIATA) and the ATM 350 card. - The second problem is a panic: thread_block: interrupt level call when rt_preempt_opt (REALTIME preemption) is enabled. A typical stack trace would look like this for the top of the stack: panic thread_block() thread_preempt() panic thread_block() unix_release_force() unix_release() schedtransmit() softclock_scan() or this: panic thread_block() thread_preempt() panic thread_block() unix_release_force() unix_release() ottooutput() atm_cmm_send() - An upgrade enhancement to the ATM350 driver. This patch prevents panics in driver routines that can be called from different interrupt levels. - Fixes a panic from the ATM OTTO/OPPO driver.