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| author |   Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2021-01-22 15:06:27 +0800 |
|---|---|---|
| committer |   Vinod Koul <vkoul@kernel.org> | 2021-02-06 15:54:53 +0530 |
| commit | 299e9780b9196bcb15b26dfdccd3244eb072d560 (patch) | |
| tree | 3c8f16fa29315f14ff524b84d8c40905eb7fa919 /drivers/soundwire | |
| parent | soundwire: bus: use sdw_update_no_pm when initializing a device (diff) | |
| download | linux-dev-299e9780b9196bcb15b26dfdccd3244eb072d560.tar.xz linux-dev-299e9780b9196bcb15b26dfdccd3244eb072d560.zip | |
soundwire: bus: use sdw_write_no_pm when setting the bus scale registers
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>
Diffstat (limited to 'drivers/soundwire')
| -rw-r--r-- | drivers/soundwire/bus.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index 6933edbbeff6..b8b578191a3b 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -1220,7 +1220,7 @@ static int sdw_slave_set_frequency(struct sdw_slave *slave) } scale_index++; - ret = sdw_write(slave, SDW_SCP_BUS_CLOCK_BASE, base); + ret = sdw_write_no_pm(slave, SDW_SCP_BUS_CLOCK_BASE, base); if (ret < 0) { dev_err(&slave->dev, "SDW_SCP_BUS_CLOCK_BASE write failed:%d\n", ret); @@ -1228,13 +1228,13 @@ static int sdw_slave_set_frequency(struct sdw_slave *slave) } /* initialize scale for both banks */ - ret = sdw_write(slave, SDW_SCP_BUSCLOCK_SCALE_B0, scale_index); + ret = sdw_write_no_pm(slave, SDW_SCP_BUSCLOCK_SCALE_B0, scale_index); if (ret < 0) { dev_err(&slave->dev, "SDW_SCP_BUSCLOCK_SCALE_B0 write failed:%d\n", ret); return ret; } - ret = sdw_write(slave, SDW_SCP_BUSCLOCK_SCALE_B1, scale_index); + ret = sdw_write_no_pm(slave, SDW_SCP_BUSCLOCK_SCALE_B1, scale_index); if (ret < 0) dev_err(&slave->dev, "SDW_SCP_BUSCLOCK_SCALE_B1 write failed:%d\n", ret); |