commit 26d79b272d388e2180d93d01b4085208c028f79a
author Jeremy Kerr <jk@ozlabs.org> Thu May 24 11:29:56 2018 +0800
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> Tue Jun 12 14:05:28 2018 +1000
tree c055875bb46f3adc9c788049aa2fc5a9ab94e2f1
parent c49e34401a32acc05bafec2b3d28d8e58410724c

fsi/master-gpio: Replace bit_bit lock with IRQ disable/enable

We currently use a spinlock (bit_lock) around operations that clock bits
out of the FSI bus, and a mutex to protect against simultaneous access
to the master.

This means that bit_lock isn't needed for mutual exlusion, only to
prevent timing issues when clocking bits out.

To reflect this, this change converts bit_lock to just the
local_irq_save/restore operation.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: Joel Stanley <joel@jms.id.au>