From 6ada5c1e1b077ab98fc144d7ac132b4dcc0148ec Mon Sep 17 00:00:00 2001 From: Charles Keepax Date: Thu, 16 Apr 2015 13:05:19 +0100 Subject: [PATCH] i2c: Mark adapter devices with pm_runtime_no_callbacks Commit 523c5b89640e ("i2c: Remove support for legacy PM") removed the PM ops from the bus type, which causes the pm operations on the s3c2410 adapter device to fail (-ENOSUPP in rpm_callback). The adapter device doesn't get bound to a driver and as such can't have its own pm_runtime callbacks. Previously this was fine as the bus callbacks would have been used, but now this can cause devices which use PM runtime and are attached over I2C to fail to resume. This commit fixes this issue by marking all adapter devices with pm_runtime_no_callbacks, since they can't have any. Signed-off-by: Charles Keepax Acked-by: Beata Michalska Signed-off-by: Wolfram Sang Fixes: 523c5b89640e Cc: stable@kernel.org --- drivers/i2c/i2c-core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 098f698fe8f4..987c124432c5 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -1413,6 +1413,8 @@ static int i2c_register_adapter(struct i2c_adapter *adap) dev_dbg(&adap->dev, "adapter [%s] registered\n", adap->name); + pm_runtime_no_callbacks(&adap->dev); + #ifdef CONFIG_I2C_COMPAT res = class_compat_create_link(i2c_adapter_compat_class, &adap->dev, adap->dev.parent); -- 2.20.1