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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: 29d158f906 ('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>
This commit is contained in:
Pierre-Louis Bossart 2021-01-22 15:06:27 +08:00 committed by Vinod Koul
parent b04c975e65
commit 299e9780b9
1 changed files with 3 additions and 3 deletions
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6
drivers/soundwire/bus.c
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@ -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);