kernel_optimize_test/drivers/soundwire
Richard Fitzgerald a4b7c0af61 soundwire: stream: Fix test for DP prepare complete
[ Upstream commit 3d3e88e336338834086278236d42039f3cde50e1 ]

In sdw_prep_deprep_slave_ports(), after the wait_for_completion()
the DP prepare status register is read. If this indicates that the
port is now prepared, the code should continue with the port setup.
It is irrelevant whether the wait_for_completion() timed out if the
port is now ready.

The previous implementation would always fail if the
wait_for_completion() timed out, even if the port was reporting
successful prepare.

This patch also fixes a minor bug where the return from sdw_read()
was not checked for error - any error code with LSBits clear could
be misinterpreted as a successful port prepare.

Fixes: 79df15b7d3 ("soundwire: Add helpers for ports operations")
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210618144745.30629-1-rf@opensource.cirrus.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-07-14 16:56:47 +02:00
..
bus_type.c
bus.c
bus.h
cadence_master.c
cadence_master.h
debugfs.c
generic_bandwidth_allocation.c
intel_init.c
intel.c
intel.h
Kconfig
Makefile
master.c
mipi_disco.c
qcom.c
slave.c
stream.c
sysfs_local.h
sysfs_slave_dpn.c
sysfs_slave.c