On 25-07-19, 18:40, Pierre-Louis Bossart wrote:
Not all platforms support runtime_pm for now, let's use runtime_pm only when enabled.
We discussed this with Ulf sometime back and it was a consensus the core should handle it, but that may take a while.
So that led me to explore what others do notably ASoC, based on this I feel we should not check the error code. We handle the non streaming case here but streaming is handled in ASoC which doesnt check the return
Pierre, can you verify the below patch and let me know if that is fine for Intel platforms
--- >8 ---
From: Vinod Koul vkoul@kernel.org Date: Fri, 2 Aug 2019 22:15:11 +0530 Subject: [PATCH] soundwire: dont check return of pm_runtime_get_sync()
Soundwire core checks pm_runtime_get_sync() return. But in case the driver has not enabled runtime pm we get an error.
To fix this, dont check the return. We handle the non streaming case in framework but streaming case has similar handling in ASoC so make it same across use cases
Signed-off-by: Vinod Koul vkoul@kernel.org --- drivers/soundwire/bus.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index fe745830a261..9cdf7e9e0852 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -326,9 +326,7 @@ 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; + pm_runtime_get_sync(slave->bus->dev);
ret = sdw_transfer(slave->bus, &msg); pm_runtime_put(slave->bus->dev); @@ -354,9 +352,7 @@ int sdw_nwrite(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; + pm_runtime_get_sync(slave->bus->dev);
ret = sdw_transfer(slave->bus, &msg); pm_runtime_put(slave->bus->dev);