On 8/2/19 11:58 AM, Vinod Koul wrote:
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
So if for some reason we cannot resume, then we'd still initiate a
transaction and have even more issues to sort out.
Fail big and fail early would really be my preference.
Also the user of this function is largely the Slave driver, which
typically doesn't do any streaming operation but controls the imp-def
registers. The bus driver will only use this routine for standard
registers and that's a very small part of the total traffic.
--- >8 ---
From: Vinod Koul <vkoul@xxxxxxxxxx>
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@xxxxxxxxxx>
---
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);
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
