tree be7debaaf18eff5ebc4a1ae6ba6d1d585bad85c3
parent 7cbcd008e104d16849e5054e69f0a3d55eaeb664
author Davidlohr Bueso <dave@stgolabs.net> 1610507737 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1611682597 +0100

usb/c67x00: Replace tasklet with work

Tasklets have long been deprecated as being too heavy on the system
by running in irq context - and this is not a performance critical
path. If a higher priority process wants to run, it must wait for
the tasklet to finish before doing so.

c67x00_do_work() will now run in process context and have further
concurrency (tasklets being serialized among themselves), but this
is done holding the c67x00->lock, so it should be fine. Furthermore,
this patch fixes the usage of the lock in the callback as otherwise
it would need to be irq-safe.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Link: https://lore.kernel.org/r/20210113031537.79859-1-dave@stgolabs.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>