Hi Pierre,
I might be wrong but this doesn't seem right to me. (Supposedly) all RT-PM functions check for "enabled" internally. The only thing that can happen is that if RT-PM isn't enabled some of those functions will return an error. So, in those cases where the return value of RT-PM functions isn't checked, I don't think you need to do anything. Where it is checked maybe do
+ if (ret < 0 && pm_runtime_enabled(slave->bus->dev))
Thanks Guennadi
On Thu, Jul 25, 2019 at 06:40:09PM -0500, Pierre-Louis Bossart wrote:
Not all platforms support runtime_pm for now, let's use runtime_pm only when enabled.
Suggested-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
drivers/soundwire/bus.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-)
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index 5ad4109dc72f..0a45dc5713df 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -332,12 +332,16 @@ int sdw_nread(struct sdw_slave *slave, u32 addr, size_t count, u8 *val) if (ret < 0) return ret;
- ret = pm_runtime_get_sync(slave->bus->dev);
- if (ret < 0)
return ret;
if (pm_runtime_enabled(slave->bus->dev)) {
ret = pm_runtime_get_sync(slave->bus->dev);if (ret < 0)return ret;}
ret = sdw_transfer(slave->bus, &msg);
- pm_runtime_put(slave->bus->dev);
if (pm_runtime_enabled(slave->bus->dev))
pm_runtime_put(slave->bus->dev);return ret;
} @@ -359,13 +363,16 @@ int sdw_nwrite(struct sdw_slave *slave, u32 addr, size_t count, u8 *val) slave->dev_num, SDW_MSG_FLAG_WRITE, val); if (ret < 0) return ret;
- ret = pm_runtime_get_sync(slave->bus->dev);
- if (ret < 0)
return ret;
if (pm_runtime_enabled(slave->bus->dev)) {
ret = pm_runtime_get_sync(slave->bus->dev);if (ret < 0)return ret;}
ret = sdw_transfer(slave->bus, &msg);
- pm_runtime_put(slave->bus->dev);
if (pm_runtime_enabled(slave->bus->dev))
pm_runtime_put(slave->bus->dev);return ret;
}
2.20.1
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