soundwire: bus: use sdw_write_no_pm when setting the bus scale registers
authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Fri, 22 Jan 2021 07:06:27 +0000 (15:06 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 4 Mar 2021 10:38:14 +0000 (11:38 +0100)
commitdfdec5eda3304080d67f04d0e5f44d067a0a5060
tree6a820d0697ff3f2356d7267f6c2e8eb3f1137cfd
parent519a514807c7dc69f40ffcf2b0dca4598b4624b5
soundwire: bus: use sdw_write_no_pm when setting the bus scale registers

[ Upstream commit 299e9780b9196bcb15b26dfdccd3244eb072d560 ]

When a Slave device is resumed, it may resume the bus and restart the
enumeration. During that process, we absolutely don't want to call
regular read/write routines which will wait for the resume to
complete, otherwise a deadlock occurs.

This patch fixes the same problem as the previous one, but is split to
make the life of linux-stable maintainers less painful.

Fixes: 29d158f90690 ('soundwire: bus: initialize bus clock base and scale registers')
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20210122070634.12825-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/soundwire/bus.c