The peripheral registrations are stored in a table
on apps processor. During SSR, these need to be deleted
and fresh ones are recorded after SSR completes. Currently
this clean up function is called from interrupt context.
This cleanup function works on a shared table, which is
protected by mutexes. Using this mutex in interrupt function
causes bug with spinlocks and generates warnings. Moving this
cleanup to work queue resolves the issue.
However, there might be race condition with this move. A new
registration might come in, while the clean up is still going on
OR yet to begin. Adding a bit mask which tracks the peripheral
undergoing SSR. if new registration is received from this processor
before clean up is completed, the registration packet is dropped.
Also, an error message is printed in kernel to notify of the drop.
Change-Id: I95e143220a3960d4e9459bb9874bab2911be0937
CRs-Fixed: 371866
Signed-off-by: Shalabh Jain <shalabhj@codeaurora.org>
6939fb2435